This file was created by the TYPO3 extension bib --- Timezone: CEST Creation date: 2023-06-08 Creation time: 17-43-38 --- Number of references 95 inproceedings 2023_bodenbenner_fairsensor 2023 7 The long-term utility and reusability of measurement data from production processes depend on the appropriate contextualization of the measured values. These requirements further mandate that modifications to the context need to be recorded. To be (re-)used at all, the data must be easily findable in the first place, which requires arbitrary filtering and searching routines. Following the FAIR guiding principles, fostering findable, accessible, interoperable and reusable (FAIR) data, in this paper, the FAIR Sensor Ecosystem is proposed, which provides a contextualization middleware based on a unified data metamodel. All information and relations which might change over time are versioned and associated with temporal validity intervals to enable full reconstruction of a system's state at any point in time. A technical validation demonstrates the correctness of the FAIR Sensor Ecosystem, including its contextualization model and filtering techniques. State-of-the-art FAIRness assessment frameworks rate the proposed FAIR Sensor Ecosystem with an average FAIRness of 71%. The obtained rating can be considered remarkable, as deductions mainly result from the lack of fully appropriate FAIRness metrics and the absence of relevant community standards for the domain of the manufacturing industry. FAIR Data; Cyber-Physical Systems; Data Management; Data Contextualization; Internet of Production internet-of-production https://www.comsys.rwth-aachen.de/fileadmin/papers/2023/2023-bodenbenner-fair-ecosystem.pdf IEEE Proceedings of the 21th IEEE International Conference on Industrial Informatics (INDIN '23), July 17-20, 2023, Lemgo, Germany Lemgo, Germany July 17-20, 2023 accepted 1 MatthiasBodenbenner JanPennekamp BenjaminMontavon KlausWehrle Robert H.Schmitt incollection 2023_rueppel_crd-b2.ii 2023 2 8 The main objectives in production technology are quality assurance, cost reduction, and guaranteed process safety and stability. Digital shadows enable a more comprehensive understanding and monitoring of processes on shop floor level. Thus, process information becomes available between decision levels, and the aforementioned criteria regarding quality, cost, or safety can be included in control decisions for production processes. The contextual data for digital shadows typically arises from heterogeneous sources. At shop floor level, the proximity to the process requires usage of available data as well as domain knowledge. Data sources need to be selected, synchronized, and processed. Especially high-frequency data requires algorithms for intelligent distribution and efficient filtering of the main information using real-time devices and in-network computing. Real-time data is enriched by simulations, metadata from product planning, and information across the whole process chain. Well-established analytical and empirical models serve as the base for new hybrid, gray box approaches. These models are then applied to optimize production process control by maximizing the productivity under given quality and safety constraints. To store and reuse the developed models, ontologies are developed and a data lake infrastructure is utilized and constantly enlarged laying the basis for a World Wide Lab (WWL). Finally, closing the control loop requires efficient quality assessment, immediately after the process and directly on the machine. This chapter addresses works in a connected job shop to acquire data, identify and optimize models, and automate systems and their deployment in the Internet of Production (IoP). Process control; Model-based control; Data aggregation; Model identification; Model optimization internet-of-production https://www.comsys.rwth-aachen.de/fileadmin/papers/2023/2023-rueppel-iop-b2.i.pdf Springer Internet of Production: Fundamentals, Applications and Proceedings 978-3-030-98062-7 10.1007/978-3-030-98062-7_7-1 1 Adrian KarlRüppel MuzafferAy BenediktBiernat IkeKunze MarkusLandwehr SamuelMann JanPennekamp PascalRabe Mark P.Sanders DominikScheurenberg SvenSchiller TiandongXi DirkAbel ThomasBergs ChristianBrecher UweReisgen Robert H.Schmitt KlausWehrle incollection 2023_pennekamp_crd-a.i 2023 2 8 The Internet of Production (IoP) leverages concepts such as digital shadows, data lakes, and a World Wide Lab (WWL) to advance today’s production. Consequently, it requires a technical infrastructure that can support the agile deployment of these concepts and corresponding high-level applications, which, e.g., demand the processing of massive data in motion and at rest. As such, key research aspects are the support for low-latency control loops, concepts on scalable data stream processing, deployable information security, and semantically rich and efficient long-term storage. In particular, such an infrastructure cannot continue to be limited to machines and sensors, but additionally needs to encompass networked environments: production cells, edge computing, and location-independent cloud infrastructures. Finally, in light of the envisioned WWL, i.e., the interconnection of production sites, the technical infrastructure must be advanced to support secure and privacy-preserving industrial collaboration. To evolve today’s production sites and lay the infrastructural foundation for the IoP, we identify five broad streams of research: (1) adapting data and stream processing to heterogeneous data from distributed sources, (2) ensuring data interoperability between systems and production sites, (3) exchanging and sharing data with different stakeholders, (4) network security approaches addressing the risks of increasing interconnectivity, and (5) security architectures to enable secure and privacy-preserving industrial collaboration. With our research, we evolve the underlying infrastructure from isolated, sparsely networked production sites toward an architecture that supports high-level applications and sophisticated digital shadows while facilitating the transition toward a WWL. Cyber-physical production systems; Data streams; Industrial data processing; Industrial network security; Industrial data security; Secure industrial collaboration internet-of-production https://www.comsys.rwth-aachen.de/fileadmin/papers/2023/2023-pennekamp-iop-a.i.pdf Springer Internet of Production: Fundamentals, Applications and Proceedings 978-3-030-98062-7 10.1007/978-3-030-98062-7_2-1 1 JanPennekamp AnastasiiaBelova ThomasBergs MatthiasBodenbenner AndreasBührig-Polaczek MarkusDahlmanns IkeKunze MoritzKröger SandraGeisler MartinHenze DanielLütticke BenjaminMontavon PhilippNiemietz LuciaOrtjohann MaximilianRudack Robert H.Schmitt UweVroomen KlausWehrle MichaelZeng incollection 2023_klugewilkes_crd-b2.iv 2023 2 8 The increasing product variability and lack of skilled workers demand for autonomous, flexible production. Since assembly is considered a main cost driver and accounts for a major part of production time, research focuses on new technologies in assembly. The paradigm of Line-less Mobile Assembly Systems (LMAS) provides a solution for the future of assembly by mobilizing all resources. Thus, dynamic product routes through spatiotemporally configured assembly stations on a shop floor free of fixed obstacles are enabled. In this chapter, we present research focal points on different levels of LMAS, starting with the macroscopic level of formation planning, followed by the mesoscopic level of mobile robot control and multipurpose input devices and the microscopic level of services, such as interpreting autonomous decisions and in-network computing. We provide cross-level data and knowledge transfer through a novel ontology-based knowledge management. Overall, our work contributes to future safe and predictable human-robot collaboration in dynamic LMAS stations based on accurate online formation and motion planning of mobile robots, novel human-machine interfaces and networking technologies, as well as trustworthy AI-based decisions. Lineless mobile assembly systems (LMAS); Formation planning; Online motion planning; In-network computing; Interpretable AI; Human-machine collaboration; Ontology-based knowledge management internet-of-production https://www.comsys.rwth-aachen.de/fileadmin/papers/2023/2023-klugewilkes-iop-b2.iv.pdf Springer Internet of Production: Fundamentals, Applications and Proceedings 978-3-030-98062-7 10.1007/978-3-030-98062-7_13-1 1 AlineKluge-Wilkes RalphBaier DanielGossen IkeKunze AleksandraMüller AmirShahidi DominikWolfschläger ChristianBrecher BurkhardCorves MathiasHüsing VerenaNitsch Robert H.Schmitt KlausWehrle inproceedings 2022-rechenberg-cim 2022 10 Maritime Cybersecurity, Intrusion Detection System, Integrated Bridge System, IEC 61162-450, NMEA 0183 https://www.comsys.rwth-aachen.de/fileadmin/papers/2022/2022-rechenberg-guiding.pdf https://zenodo.org/record/7148794 Zenodo European Workshop on Maritime Systems Resilience and Security (MARESEC 2022) Bremerhaven, Germany 10.5281/zenodo.7148794 1 Merlinvon Rechenberg NinaRößler MariSchmidt KonradWolsing FlorianMotz MichaelBergmann ElmarPadilla JanBauer inproceedings 2022_lohmoeller_sovereignty 2022 9 5 3306 51-63 Data ecosystems are the foundation of emerging data-driven business models as they (i) enable an automated exchange between their participants and (ii) provide them with access to huge and heterogeneous data sources. However, the corresponding benefits come with unforeseen risks as also sensitive information is potentially exposed. Consequently, data security is of utmost importance and, thus, a central requirement for the successful implementation of these ecosystems. Current initiatives, such as IDS and GAIA-X, hence foster sovereign participation via a federated infrastructure where participants retain local control. However, these designs place significant trust in remote infrastructure by mostly implementing organizational security measures such as certification processes prior to admission of a participant. At the same time, due to the sensitive nature of involved data, participants are incentivized to bypass security measures to maximize their own benefit: In practice, this issue significantly weakens sovereignty guarantees. In this paper, we hence claim that data ecosystems must be extended with technical means to reestablish such guarantees. To underpin our position, we analyze promising building blocks and identify three core research directions toward stronger data sovereignty, namely trusted remote policy enforcement, verifiable data tracking, and integration of resource-constrained participants. We conclude that these directions are critical to securely implement data ecosystems in data-sensitive contexts. internet-of-production https://www.comsys.rwth-aachen.de/fileadmin/papers/2022/2022-lohmoeller-deco.pdf CEUR Workshop Proceedings Proceedings of the 1st International Workshop on Data Ecosystems (DEco '22), co-located with the 48th International Conference on Very Large Databases (VLDB '22), September 5-9, 2022, Sydney, Australia, Sydney, Australia International Workshop on Data Ecosystems (DEco '22) September 5, 2022 1613-0073 1 JohannesLohmöller JanPennekamp RomanMatzutt KlausWehrle article 2022-henze-tii-prada IEEE Transactions on Cloud Computing 2022 9 10 3 1661-1674 In past years, cloud storage systems saw an enormous rise in usage. However, despite their popularity and importance as underlying infrastructure for more complex cloud services, today’s cloud storage systems do not account for compliance with regulatory, organizational, or contractual data handling requirements by design. Since legislation increasingly responds to rising data protection and privacy concerns, complying with data handling requirements becomes a crucial property for cloud storage systems. We present Prada , a practical approach to account for compliance with data handling requirements in key-value based cloud storage systems. To achieve this goal, Prada introduces a transparent data handling layer, which empowers clients to request specific data handling requirements and enables operators of cloud storage systems to comply with them. We implement Prada on top of the distributed database Cassandra and show in our evaluation that complying with data handling requirements in cloud storage systems is practical in real-world cloud deployments as used for microblogging, data sharing in the Internet of Things, and distributed email storage. https://www.comsys.rwth-aachen.de/fileadmin/papers/2022/2022-henze-tii-prada.pdf Online en 2168-7161 10.1109/TCC.2020.3000336 1 MartinHenze RomanMatzutt JensHiller ErikMühmer Jan HenrikZiegeldorf Johannesvan der Giet KlausWehrle inproceedings 2022_wagner_ccchain 2022 5 4 Blockchain technology promises to overcome trust and privacy concerns inherent to centralized information sharing. However, current decentralized supply chain management systems do either not meet privacy and scalability requirements or require a trustworthy consortium, which is challenging for increasingly dynamic supply chains with constantly changing participants. In this paper, we propose CCChain, a scalable and privacy-aware supply chain management system that stores all information locally to give companies complete sovereignty over who accesses their data. Still, tamper protection of all data through a permissionless blockchain enables on-demand tracking and tracing of products as well as reliable information sharing while affording the detection of data inconsistencies. Our evaluation confirms that CCChain offers superior scalability in comparison to alternatives while also enabling near real-time tracking and tracing for many, less complex products. supply chain management; blockchain; permissionless; deployment; tracing and tracking; privacy internet-of-production https://www.comsys.rwth-aachen.de/fileadmin/papers/2022/2022-wagner-ccchain.pdf IEEE Proceedings of the 2022 IEEE International Conference on Blockchain and Cryptocurrency (ICBC '22), May 2-5, 2022, Shanghai, China Shanghai, China May 2-5, 2022 978-1-6654-9538-7/22 10.1109/ICBC54727.2022.9805503 1 EricWagner RomanMatzutt JanPennekamp LennartBader IrakliBajelidze KlausWehrle MartinHenze inproceedings 2022_matzutt_redactchain 2022 5 3 Blockchains gained tremendous attention for their capability to provide immutable and decentralized event ledgers that can facilitate interactions between mutually distrusting parties. However, precisely this immutability and the openness of permissionless blockchains raised concerns about the consequences of illicit content being irreversibly stored on them. Related work coined the notion of redactable blockchains, which allow for removing illicit content from their history without affecting the blockchain's integrity. While honest users can safely prune identified content, current approaches either create trust issues by empowering fixed third parties to rewrite history, cannot react quickly to reported content due to using lengthy public votings, or create large per-redaction overheads. In this paper, we instead propose to outsource redactions to small and periodically exchanged juries, whose members can only jointly redact transactions using chameleon hash functions and threshold cryptography. Multiple juries are active at the same time to swiftly redact reported content. They oversee their activities via a global redaction log, which provides transparency and allows for appealing and reversing a rogue jury's decisions. Hence, our approach establishes a framework for the swift and transparent moderation of blockchain content. Our evaluation shows that our moderation scheme can be realized with feasible per-block and per-redaction overheads, i.e., the redaction capabilities do not impede the blockchain's normal operation. redactable blockchain; illicit content; chameleon hash functions; threshold cryptography mynedata; impact-digital; digital-campus https://www.comsys.rwth-aachen.de/fileadmin/papers/2022/2022-matzutt-redactchain.pdf IEEE Proceedings of the 2022 IEEE International Conference on Blockchain and Cryptocurrency (ICBC '22), May 2-5, 2022, Shanghai, China Shanghai, China May 2-5, 2022 978-1-6654-9538-7/22 10.1109/ICBC54727.2022.9805508 1 RomanMatzutt VincentAhlrichs JanPennekamp RomanKarwacik KlausWehrle article 2022_brauner_iop ACM Transactions on Internet of Things 2022 5 1 3 2 The Industrial Internet-of-Things (IIoT) promises significant improvements for the manufacturing industry by facilitating the integration of manufacturing systems by Digital Twins. However, ecological and economic demands also require a cross-domain linkage of multiple scientific perspectives from material sciences, engineering, operations, business, and ergonomics, as optimization opportunities can be derived from any of these perspectives. To extend the IIoT to a true Internet of Production, two concepts are required: first, a complex, interrelated network of Digital Shadows which combine domain-specific models with data-driven AI methods; and second, the integration of a large number of research labs, engineering, and production sites as a World Wide Lab which offers controlled exchange of selected, innovation-relevant data even across company boundaries. In this article, we define the underlying Computer Science challenges implied by these novel concepts in four layers: Smart human interfaces provide access to information that has been generated by model-integrated AI. Given the large variety of manufacturing data, new data modeling techniques should enable efficient management of Digital Shadows, which is supported by an interconnected infrastructure. Based on a detailed analysis of these challenges, we derive a systematized research roadmap to make the vision of the Internet of Production a reality. Internet of Production; World Wide Lab; Digital Shadows; Industrial Internet of Things internet-of-production https://www.comsys.rwth-aachen.de/fileadmin/papers/2022/2022-brauner-digital-transformation.pdf ACM 2691-1914 10.1145/3502265 1 PhilippBrauner ManuelaDalibor MatthiasJarke IkeKunze IstvánKoren GerhardLakemeyer MartinLiebenberg JudithMichael JanPennekamp ChristophQuix BernhardRumpe Wilvan der Aalst KlausWehrle AndreasWortmann MartinaZiefle techreport draft-irtf-coinrg-use-cases-02 2022 3 draft-irtf-coinrg-use-cases-02 expires: 8 September 2022 (work in progress) https://www.comsys.rwth-aachen.de/fileadmin/papers/2022/draft-irtf-coinrg-use-cases-02.pdf https://datatracker.ietf.org/doc/draft-irtf-coinrg-use-cases/ Online IETF Trust Internet Drafts Internet Engineering Task Force Internet Engineering Task Force IkeKunze KlausWehrle DirkTrossen Marie-JoséMontpetit Xavierde Foy DavidGriffin MiguelRio inproceedings 2021_mitseva_sequences 2021 11 17 2411-2413 Website fingerprinting (WFP) is a special case of traffic analysis, where a passive attacker infers information about the content of encrypted and anonymized connections by observing patterns of data flows. Although modern WFP attacks pose a serious threat to online privacy of users, including Tor users, they usually aim to detect single pages only. By ignoring the browsing behavior of users, the attacker excludes valuable information: users visit multiple pages of a single website consecutively, e.g., by following links. In this paper, we propose two novel methods that can take advantage of the consecutive visits of multiple pages to detect websites. We show that two up to three clicks within a site allow attackers to boost the accuracy by more than 20% and to dramatically increase the threat to users' privacy. We argue that WFP defenses have to consider this new dimension of the attack surface. Traffic Analysis; Website Fingerprinting; Web Privacy https://www.comsys.rwth-aachen.de/fileadmin/papers/2021/2021-mitseva-fingerprinting-sequences.pdf ACM Proceedings of the 28th ACM SIGSAC Conference on Computer and Communications Security (CCS '21), November 15-19, 2021, Seoul, Korea Seoul, Korea November 15-19, 2021 978-1-4503-8454-4/21/11 10.1145/3460120.3485347 1 AsyaMitseva JanPennekamp JohannesLohmöller TorstenZiemann CarlHoerchner KlausWehrle AndriyPanchenko article 2021_pennekamp_accountable_manufacturing Automation 2021 9 13 2 3 202-219 The Internet of Things provides manufacturing with rich data for increased automation. Beyond company-internal data exploitation, the sharing of product and manufacturing process data along and across supply chains enables more efficient production flows and product lifecycle management. Even more, data-based automation facilitates short-lived ad hoc collaborations, realizing highly dynamic business relationships for sustainable exploitation of production resources and capacities. However, the sharing and use of business data across manufacturers and with end customers add requirements on data accountability, verifiability, and reliability and needs to consider security and privacy demands. While research has already identified blockchain technology as a key technology to address these challenges, current solutions mainly evolve around logistics or focus on established business relationships instead of automated but highly dynamic collaborations that cannot draw upon long-term trust relationships. We identify three open research areas on the road to such a truly accountable and dependable manufacturing enabled by blockchain technology: blockchain-inherent challenges, scenario-driven challenges, and socio-economic challenges. Especially tackling the scenario-driven challenges, we discuss requirements and options for realizing a blockchain-based trustworthy information store and outline its use for automation to achieve a reliable sharing of product information, efficient and dependable collaboration, and dynamic distributed markets without requiring established long-term trust. blockchain; supply chain management; Industry 4.0; manufacturing; secure industrial collaboration; scalability; Industrial Internet of Things; Internet of Production internet-of-production https://www.comsys.rwth-aachen.de/fileadmin/papers/2021/2021-pennekamp-manufacturing.pdf MDPI 2673-4052 10.3390/automation2030013 1 JanPennekamp RomanMatzutt Salil S.Kanhere JensHiller KlausWehrle article 2021_matzutt_coinprune_v2 IEEE Transactions on Network and Service Management 2021 9 10 18 3 3064-3078 Popular cryptocurrencies continue to face serious scalability issues due to their ever-growing blockchains. Thus, modern blockchain designs began to prune old blocks and rely on recent snapshots for their bootstrapping processes instead. Unfortunately, established systems are often considered incapable of adopting these improvements. In this work, we present CoinPrune, our block-pruning scheme with full Bitcoin compatibility, to revise this popular belief. CoinPrune bootstraps joining nodes via snapshots that are periodically created from Bitcoin's set of unspent transaction outputs (UTXO set). Our scheme establishes trust in these snapshots by relying on CoinPrune-supporting miners to mutually reaffirm a snapshot's correctness on the blockchain. This way, snapshots remain trustworthy even if adversaries attempt to tamper with them. Our scheme maintains its retrospective deployability by relying on positive feedback only, i.e., blocks containing invalid reaffirmations are not rejected, but invalid reaffirmations are outpaced by the benign ones created by an honest majority among CoinPrune-supporting miners. Already today, CoinPrune reduces the storage requirements for Bitcoin nodes by two orders of magnitude, as joining nodes need to fetch and process only 6 GiB instead of 271 GiB of data in our evaluation, reducing the synchronization time of powerful devices from currently 7 h to 51 min, with even larger potential drops for less powerful devices. CoinPrune is further aware of higher-level application data, i.e., it conserves otherwise pruned application data and allows nodes to obfuscate objectionable and potentially illegal blockchain content from their UTXO set and the snapshots they distribute. blockchain; block pruning; synchronization; bootstrapping; scalability; velvet fork; Bitcoin mynedata; impact_digital; digital_campus https://www.comsys.rwth-aachen.de/fileadmin/papers/2021/2021-matzutt-coinprune-v2.pdf English 1932-4537 10.1109/TNSM.2021.3073270 1 RomanMatzutt BenediktKalde JanPennekamp ArthurDrichel MartinHenze KlausWehrle inproceedings 2021_mangel_reshare 2021 6 8 12731 265-283 As decision-making is increasingly data-driven, trustworthiness and reliability of the underlying data, e.g., maintained in knowledge graphs or on the Web, are essential requirements for their usability in the industry. However, neither traditional solutions, such as paper-based data curation processes, nor state-of-the-art approaches, such as distributed ledger technologies, adequately scale to the complex requirements and high throughput of continuously evolving industrial data. Motivated by a practical use case with high demands towards data trustworthiness and reliability, we identify the need for digitally-verifiable data immutability as a still insufficiently addressed dimension of data quality. Based on our discussion of shortcomings in related work, we thus propose ReShare, our novel concept of digital transmission contracts with bilateral signatures, to address this open issue for both RDF knowledge graphs and arbitrary data on the Web. Our quantitative evaluation of ReShare’s performance and scalability reveals only moderate computation and communication overhead, indicating significant potential for cost-reductions compared to today’s approaches. By cleverly integrating digital transmission contracts with existing Web-based information systems, ReShare provides a promising foundation for data sharing and reuse in Industry 4.0 and beyond, enabling digital accountability through easily-adoptable digitally-verifiable data immutability and non-repudiation. Lecture Notes in Computer Science (LNCS), Volume 12731 Digital transmission contracts; Trust; Data immutability; Non-repudiation; Accountability; Data dynamics; Linked Data; Knowledge graphs internet-of-production https://www.comsys.rwth-aachen.de/fileadmin/papers/2021/2021-mangel-eswc-reshare.pdf Springer Proceedings of the 18th Extended Semantic Web Conference (ESWC '21), June 6-10, 2021, Heraklion, Greece Heraklion, Greece June 6-10, 2021 978-3-030-77384-7 0302-9743 10.1007/978-3-030-77385-4_16 1 SimonMangel LarsGleim JanPennekamp KlausWehrle StefanDecker article 2021_buckhorst_lmas Procedia CIRP 2021 5 3 99 448-453 Assembly systems must provide maximum flexibility qualified by organization and technology to offer cost-compliant performance features to differentiate themselves from competitors in buyers' markets. By mobilization of multipurpose resources and dynamic planning, Line-less Mobile Assembly Systems (LMASs) offer organizational reconfigurability. By proposing a holarchy to combine LMASs with the concept of an Internet of Production (IoP), we enable LMASs to source valuable information from cross-level production networks, physical resources, software nodes, and data stores that are interconnected in an IoP. The presented holarchy provides a concept of how to address future challenges, meet the requirements of shorter lead times, and unique lifecycle support. The paper suggests an application of decision making, distributed sensor services, recommender-based data reduction, and in-network computing while considering safety and human usability alike. Proceedings of the 14th CIRP Conference on Intelligent Computation in Manufacturing Engineering (ICME '20), July 14-17, 2020, Gulf of Naples, Italy Internet of Production; Line-less Mobile Assembly System; Industrial Assembly; Smart Factory internet-of-production https://www.comsys.rwth-aachen.de/fileadmin/papers/2021/2021-buckhorst-holarchy.pdf Elsevier Gulf of Naples, Italy July 14-17, 2020 2212-8271 10.1016/j.procir.2021.03.064 1 Armin F.Buckhorst BenjaminMontavon DominikWolfschläger MelanieBuchsbaum AmirShahidi HenningPetruck IkeKunze JanPennekamp ChristianBrecher MathiasHüsing BurkhardCorves VerenaNitsch KlausWehrle Robert H.Schmitt article 2021_bader_privaccichain Information Processing & Management 2021 5 1 58 3 The benefits of information sharing along supply chains are well known for improving productivity and reducing costs. However, with the shift towards more dynamic and flexible supply chains, privacy concerns severely challenge the required information retrieval. A lack of trust between the different involved stakeholders inhibits advanced, multi-hop information flows, as valuable information for tracking and tracing products and parts is either unavailable or only retained locally. Our extensive literature review of previous approaches shows that these needs for cross-company information retrieval are widely acknowledged, but related work currently only addresses them insufficiently. To overcome these concerns, we present PrivAccIChain, a secure, privacy-preserving architecture for improving the multi-hop information retrieval with stakeholder accountability along supply chains. To address use case-specific needs, we particularly introduce an adaptable configuration of transparency and data privacy within our design. Hence, we enable the benefits of information sharing as well as multi-hop tracking and tracing even in supply chains that include mutually distrusting stakeholders. We evaluate the performance of PrivAccIChain and demonstrate its real-world feasibility based on the information of a purchasable automobile, the e.GO Life. We further conduct an in-depth security analysis and propose tunable mitigations against common attacks. As such, we attest PrivAccIChain's practicability for information management even in complex supply chains with flexible and dynamic business relationships. multi-hop collaboration; tracking and tracing; Internet of Production; e.GO; attribute-based encryption internet-of-production https://www.comsys.rwth-aachen.de/fileadmin/papers/2021/2021-bader-ipm-privaccichain.pdf Elsevier 0306-4573 10.1016/j.ipm.2021.102529 1 LennartBader JanPennekamp RomanMatzutt DavidHedderich MarkusKowalski VolkerLücken KlausWehrle article 2021_schomakers_insights Computer Law Review International 2021 2 15 22 1 8-15 Social media, cloud computing, and the Internet of Things connect people around the globe, offering manifold benefits. However, the technological advances and increased user participation generate novel challenges for users' privacy. From the users' perspective, the consequences of data disclosure depend on the perceived sensitivity of that data. But in light of the new technological opportunities to process and combine data, it is questionable whether users can adequately evaluate risks of data disclosures. As mediating authority, data protection laws such as the European General Data Protection Regulation try to protect user data, granting enhanced protection to "special categories" of data. This article assesses the legal, technological, and users' perspectives on information sensitivity and their interplay. Technologically, all data can be referred to as "potentially sensitive." The legal and users' perspective on information sensitivity deviate from this standpoint, as some data types are granted special protection by law but are not perceived as very sensitive by users and vice versa. The key findings here suggest the GDPR adequately protecting users' privacy but for small adjustments. Information Sensitivity, Privacy, European Data Protection Law 1610-7608 10.9785/cri-2021-220103 1 Eva-MariaSchomakers ChantalLidynia DirkMüllmann RomanMatzutt KlausWehrle IndraSpiecker gen. Döhmann MartinaZiefle inproceedings 2019_rut_schomakers_privacy 2021 1 27 857-870 Social media, cloud computing, and the Internet of Things connect people around the globe, offering manifold benefits. However, the technological advances and increased user participation generate novel challenges for users' privacy. From the users' perspective, the consequences of data disclosure depend on the perceived sensitivity of that data. But in light of the new technological opportunities to process and combine data, it is questionable whether users can adequately evaluate risks of data disclosures. As mediating authority, data protection laws such as the European General Data Protection Regulation try to protect user data, granting enhanced protection to "special categories" of data. In this paper, we assess the legal, technological, and users' perspectives on information sensitivity and their interplay. Technologically, all data can be referred to as "potentially sensitive." The legal and users' perspective on information sensitivity deviate from this standpoint, as some data types are granted special protection by law but are not perceived as very sensitive by users and vice versa. Our key findings still suggest the GDPR adequately protecting users' privacy but for small adjustments. Information Sensitivity,Privacy,European Data Protection Law mynedata https://www.comsys.rwth-aachen.de/fileadmin/papers/2021/2021-schomakers-3perspectives.pdf https://dl.gi.de/handle/20.500.12116/34788 https://arxiv.org/abs/1911.06569 Gesellschaft für Informatik

Bonn

INFORMATIK 2020 Karlsruhe, Germany INFORMATIK 2020 2020-09-28 to 2020-10-01 English 10.18420/inf2020_76 1 Eva-MariaSchomakers ChantalLidynia DirkMüllmann RomanMatzutt KlausWehrle IndraSpiecker gen. Döhmann MartinaZiefle article 2021-wehrle-energy Energy Technology 2021 9 2 10.1002/ente.202000937 1 FriedirchWiegel EdoardoDe Din AntonelloMonti KlausWehrle MarcHiller MartinaZitterbart VeitHagenmeyer inproceedings 2020_delacadena_trafficsliver 2020 11 12 1971-1985 Website fingerprinting (WFP) aims to infer information about the content of encrypted and anonymized connections by observing patterns of data flows based on the size and direction of packets. By collecting traffic traces at a malicious Tor entry node — one of the weakest adversaries in the attacker model of Tor — a passive eavesdropper can leverage the captured meta-data to reveal the websites visited by a Tor user. As recently shown, WFP is significantly more effective and realistic than assumed. Concurrently, former WFP defenses are either infeasible for deployment in real-world settings or defend against specific WFP attacks only. To limit the exposure of Tor users to WFP, we propose novel lightweight WFP defenses, TrafficSliver, which successfully counter today’s WFP classifiers with reasonable bandwidth and latency overheads and, thus, make them attractive candidates for adoption in Tor. Through user-controlled splitting of traffic over multiple Tor entry nodes, TrafficSliver limits the data a single entry node can observe and distorts repeatable traffic patterns exploited by WFP attacks. We first propose a network-layer defense, in which we apply the concept of multipathing entirely within the Tor network. We show that our network-layer defense reduces the accuracy from more than 98% to less than 16% for all state-of-the-art WFP attacks without adding any artificial delays or dummy traffic. We further suggest an elegant client-side application-layer defense, which is independent of the underlying anonymization network. By sending single HTTP requests for different web objects over distinct Tor entry nodes, our application-layer defense reduces the detection rate of WFP classifiers by almost 50 percentage points. Although it offers lower protection than our network-layer defense, it provides a security boost at the cost of a very low implementation overhead and is fully compatible with today’s Tor network. Traffic Analysis; Website Fingerprinting; Privacy; Anonymous Communication; Onion Routing; Web Privacy https://www.comsys.rwth-aachen.de/fileadmin/papers/2020/2020-delacadena-trafficsliver.pdf https://github.com/TrafficSliver ACM Proceedings of the 27th ACM SIGSAC Conference on Computer and Communications Security (CCS '20), November 9-13, 2020, Orlando, FL, USA Virtual Event, USA November 9-13, 2020 978-1-4503-7089-9/20/11 10.1145/3372297.3423351 1 WladimirDe la Cadena AsyaMitseva JensHiller JanPennekamp SebastianReuter JulianFilter KlausWehrle ThomasEngel AndriyPanchenko inproceedings 2020_matzutt_anonboot 2020 10 7 531-542 Distributed anonymity services, such as onion routing networks or cryptocurrency tumblers, promise privacy protection without trusted third parties. While the security of these services is often well-researched, security implications of their required bootstrapping processes are usually neglected: Users either jointly conduct the anonymization themselves, or they need to rely on a set of non-colluding privacy peers. However, the typically small number of privacy peers enable single adversaries to mimic distributed services. We thus present AnonBoot, a Sybil-resistant medium to securely bootstrap distributed anonymity services via public blockchains. AnonBoot enforces that peers periodically create a small proof of work to refresh their eligibility for providing secure anonymity services. A pseudo-random, locally replicable bootstrapping process using on-chain entropy then prevents biasing the election of eligible peers. Our evaluation using Bitcoin as AnonBoot's underlying blockchain shows its feasibility to maintain a trustworthy repository of 1000 peers with only a small storage footprint while supporting arbitrarily large user bases on top of most blockchains. anonymization; bootstrapping; public blockchain; Sybil attack; anonymity network; cryptocurrency tumbler; Bitcoin; Tor impact_digital; digital_campus https://www.comsys.rwth-aachen.de/fileadmin/papers/2020/2020-matzutt-anonboot.pdf ACM Proceedings of the 15th ACM ASIA Conference on Computer and Communications Security (ASIACCS '20), October 5-9, 2020, Taipei, Taiwan Taipei, Taiwan ASIACCS 2020 October 5-9, 2020 978-1-4503-6750-9/20/10 10.1145/3320269.3384729 1 RomanMatzutt JanPennekamp ErikBuchholz KlausWehrle inproceedings 2020_pennekamp_supply_chain_sensing 2020 7 1 Trust along digitalized supply chains is challenged by the aspect that monitoring equipment may not be trustworthy or unreliable as respective measurements originate from potentially untrusted parties. To allow for dynamic relationships along supply chains, we propose a blockchain-backed supply chain monitoring architecture relying on trusted hardware. Our design provides a notion of secure end-to-end sensing of interactions even when originating from untrusted surroundings. Due to attested checkpointing, we can identify misinformation early on and reliably pinpoint the origin. A blockchain enables long-term verifiability for all (now trustworthy) IoT data within our system even if issues are detected only after the fact. Our feasibility study and cost analysis further show that our design is indeed deployable in and applicable to today's supply chain settings. supply chain; trusted computing; trusted execution; blockchain; Internet of Production; condition monitoring internet-of-production https://comsys.rwth-aachen.de/fileadmin/papers/2020/2020-pennekamp-supply-chain-sensing.pdf IEEE Proceedings of the 5th International Workshop on Cyber-Physical Systems Security (CPS-Sec '20), co-located with the 8th IEEE Conference on Communications and Network Security (CNS '20), June 29-July 1, 2020, Avignon, France Avignon, France June 29-July 1, 2020 978-1-7281-4760-4 10.1109/CNS48642.2020.9162337 1 JanPennekamp FritzAlder RomanMatzutt Jan TobiasMühlberg FrankPiessens KlausWehrle inproceedings 2020_matzutt_coinprune 2020 6 24 298-306 Bitcoin was the first successful decentralized cryptocurrency and remains the most popular of its kind to this day. Despite the benefits of its blockchain, Bitcoin still faces serious scalability issues, most importantly its ever-increasing blockchain size. While alternative designs introduced schemes to periodically create snapshots and thereafter prune older blocks, already-deployed systems such as Bitcoin are often considered incapable of adopting corresponding approaches. In this work, we revise this popular belief and present CoinPrune, a snapshot-based pruning scheme that is fully compatible with Bitcoin. CoinPrune can be deployed through an opt-in velvet fork, i.e., without impeding the established Bitcoin network. By requiring miners to publicly announce and jointly reaffirm recent snapshots on the blockchain, CoinPrune establishes trust into the snapshots' correctness even in the presence of powerful adversaries. Our evaluation shows that CoinPrune reduces the storage requirements of Bitcoin already by two orders of magnitude today, with further relative savings as the blockchain grows. In our experiments, nodes only have to fetch and process 5 GiB instead of 230 GiB of data when joining the network, reducing the synchronization time on powerful devices from currently 5 h to 46 min, with even more savings for less powerful devices. blockchain; block pruning; synchronization; bootstrapping; scalability; velvet fork; Bitcoin mynedata; impact_digital; digital_campus https://comsys.rwth-aachen.de/fileadmin/papers/2020/2020-matzutt-coinprune.pdf https://coinprune.comsys.rwth-aachen.de IEEE Proceedings of the 19th IFIP Networking 2020 Conference (NETWORKING '20), June 22-26, 2020, Paris, France Paris, France NETWORKING 2020 June 22-26, 2020 978-3-903176-28-7 1 RomanMatzutt BenediktKalde JanPennekamp ArthurDrichel MartinHenze KlausWehrle inproceedings 2020_pennekamp_supply_chain_accountability 2020 6 7 Today's supply chains are becoming increasingly flexible in nature. While adaptability is vastly increased, these more dynamic associations necessitate more extensive data sharing among different stakeholders while simultaneously overturning previously established levels of trust. Hence, manufacturers' demand to track goods and to investigate root causes of issues across their supply chains becomes more challenging to satisfy within these now untrusted environments. Complementarily, suppliers need to keep any data irrelevant to such routine checks secret to remain competitive. To bridge the needs of contractors and suppliers in increasingly flexible supply chains, we thus propose to establish a privacy-preserving and distributed multi-hop accountability log among the involved stakeholders based on Attribute-based Encryption and backed by a blockchain. Our large-scale feasibility study is motivated by a real-world manufacturing process, i.e., a fine blanking line, and reveals only modest costs for multi-hop tracing and tracking of goods. supply chain; multi-hop tracking and tracing; blockchain; attribute-based encryption; Internet of Production internet-of-production https://comsys.rwth-aachen.de/fileadmin/papers/2020/2020-pennekamp-supply-chain-privacy.pdf IEEE Proceedings of the 2020 IEEE International Conference on Communications Workshops (ICC Workshops '20), 1st Workshop on Blockchain for IoT and Cyber-Physical Systems (BIoTCPS '20), June 7-11, 2020, Dublin, Ireland Dublin, Ireland June 7-11, 2020 978-1-7281-7440-2 2474-9133 10.1109/ICCWorkshops49005.2020.9145100 1 JanPennekamp LennartBader RomanMatzutt PhilippNiemietz DanielTrauth MartinHenze ThomasBergs KlausWehrle inproceedings 2020-mann-ur-weldseamstudy 2020 6 https://www.comsys.rwth-aachen.de/fileadmin/papers/2020/2020-mann-weld-seam-geometry-control.pdf Proceedings of the 2020 Internal Conference on Ubiquitous Robots Internal Conference on Ubiquitous Robots June 22-26, 2020 10.1109/UR49135.2020.9144839 1 SamuelMann RenéGlebke IkeKunze DominikScheurenberg RahulSharma UweReisgen KlausWehrle DirkAbel article 2020_mann_welding_layers Advanced Structured Materials 2020 4 1 125 101-118 A connected, digitalized welding production unlocks vast and dynamic potentials: from improving state of the art welding to new business models in production. For this reason, offering frameworks, which are capable of addressing multiple layers of applications on the one hand and providing means of data security and privacy for ubiquitous dataflows on the other hand, is an important step to enable the envisioned advances. In this context, welding production has been introduced from the perspective of interlaced process layers connecting information sources across various entities. Each layer has its own distinct challenges from both a process view and a data perspective. Besides, investigating each layer promises to reveal insight into (currently unknown) process interconnections. This approach has been substantiated by methods for data security and privacy to draw a line between secure handling of data and the need of trustworthy dealing with sensitive data among different parties and therefore partners. In conclusion, the welding production has to develop itself from an accumulation of local and isolated data sources towards a secure industrial collaboration in an Internet of Production. Proceedings of the 1st International Conference on Advanced Joining Processes (AJP '19) Welding Production; Industrie 4.0; Internet of Production; Data Security; Data Privacy Internet-of-Production https://www.comsys.rwth-aachen.de/fileadmin/papers/2020/2020-mann-welding-layers.pdf Springer Ponta Delgada, Azores, Portugal October 24-25, 2019 978-981-15-2956-6 1869-8433 10.1007/978-981-15-2957-3_8 1 SamuelMann JanPennekamp TobiasBrockhoff AnahitaFarhang MahsaPourbafrani LukasOster Merih SeranUysal RahulSharma UweReisgen KlausWehrle Wilvan der Aalst inproceedings 2020_matzutt_coralis 2020 1 7 529-534 Traditionally, the university landscape is highly federated, which hinders potentials for coordinated collaborations. While the lack of a strict hierarchy on the inter-university level is critical for ensuring free research and higher education, this concurrency limits the access to high-quality education materials. Especially regarding resources such as lecture notes or exercise tasks we observe a high susceptibility to redundant work and lacking quality assessment of material created in isolation by individual university institutes. To remedy this situation, in this paper we propose CORALIS, a decentralized marketplace for offering, acquiring, discussing, and improving education resources across university borders. Our design is based on a permissioned blockchain to (a) realize accountable access control via simple on-chain license terms, (b) trace the evolution of encrypted containers accumulating bundles of shareable education resources, and (c) record user comments and ratings for further improving the quality of offered education material. blockchain platform; permissioned blockchain; education material; quality assessment; collaborative work impact_digital https://comsys.rwth-aachen.de/fileadmin/papers/2020/2020-matzutt-coralis.pdf IEEE Proceedings of the 34th International Conference on Information Networking (ICOIN '20), January 7-10, 2020, Barcelona, Spain Barcelona, Spain January 7-10, 2020 978-1-7281-4199-2 10.1109/ICOIN48656.2020.9016478 1 RomanMatzutt JanPennekamp KlausWehrle inproceedings 2019-krude-online-reprogramming 2019 12 9 maki https://www.comsys.rwth-aachen.de/fileadmin/papers/2019/2019-krude-online-reprogramming.pdf ACM 1st ACM CoNEXT Workshop on Emerging in-Network Computing Paradigms (ENCP '19) 978-1-4503-7000-4/19/12 10.1145/3359993.3366643 1 JohannesKrude JacoHofmann MatthiasEichholz KlausWehrle AndreasKoch MiraMezini inproceedings 2019_delacadena_countermeasure 2019 11 12 2533-2535 Website fingerprinting (WFP) is a special type of traffic analysis, which aims to infer the websites visited by a user. Recent studies have shown that WFP targeting Tor users is notably more effective than previously expected. Concurrently, state-of-the-art defenses have been proven to be less effective. In response, we present a novel WFP defense that splits traffic over multiple entry nodes to limit the data a single malicious entry can use. Here, we explore several traffic-splitting strategies to distribute user traffic. We establish that our weighted random strategy dramatically reduces the accuracy from nearly 95% to less than 35% for four state-of-the-art WFP attacks without adding any artificial delays or dummy traffic. https://www.comsys.rwth-aachen.de/fileadmin/papers/2019/2019-delacadena-splitting-defense.pdf ACM Proceedings of the 26th ACM SIGSAC Conference on Computer and Communications Security (CCS '19), November 11-15, 2019, London, United Kingdom London, United Kingdom November 11-15, 2019 978-1-4503-6747-9/19/11 10.1145/3319535.3363249 1 WladimirDe la Cadena AsyaMitseva JanPennekamp JensHiller FabianLanze ThomasEngel KlausWehrle AndriyPanchenko inproceedings 2019-dahlmanns-icnp-knowledgeSystem 2019 10 7 More and more traditional services, such as malware detectors or collaboration services in industrial scenarios, move to the cloud. However, this behavior poses a risk for the privacy of clients since these services are able to generate profiles containing very sensitive information, e.g., vulnerability information or collaboration partners. Hence, a rising need for protocols that enable clients to obtain knowledge without revealing their requests exists. To address this issue, we propose a protocol that enables clients (i) to query large cloud-based knowledge systems in a privacy-preserving manner using Private Set Intersection and (ii) to subsequently obtain individual knowledge items without leaking the client’s requests via few Oblivious Transfers. With our preliminary design, we allow clients to save a significant amount of time in comparison to performing Oblivious Transfers only. Poster Session private query protocol; knowledge system; remote knowledge; private set intersection; oblivious transfer kimusin; internet-of-production https://www.comsys.rwth-aachen.de/fileadmin/papers/2019/2019-dahlmanns-knowledge-system.pdf IEEE Proceedings of the 27th IEEE International Conference on Network Protocols (ICNP '19), October 7-10, 2019, Chicago, IL, USA Chicago, IL, USA 27th IEEE International Conference on Network Protocols (ICNP 2019) 7-10. Oct. 2019 978-1-7281-2700-2 2643-3303 10.1109/ICNP.2019.8888121 1 MarkusDahlmanns ChrisDax RomanMatzutt JanPennekamp JensHiller KlausWehrle inproceedings 2019_pennekamp_multipath 2019 10 7 Users of an onion routing network, such as Tor, depend on its anonymity properties. However, especially malicious entry nodes, which know the client’s identity, can also observe the whole communication on their link to the client and, thus, conduct several de-anonymization attacks. To limit this exposure and to impede corresponding attacks, we propose to multipath traffic between the client and the middle node to reduce the information an attacker can obtain at a single vantage point. To facilitate the deployment, only clients and selected middle nodes need to implement our approach, which works transparently for the remaining legacy nodes. Furthermore, we let clients control the splitting strategy to prevent any external manipulation. Poster Session https://www.comsys.rwth-aachen.de/fileadmin/papers/2019/2019-pennekamp-multipathing.pdf IEEE Proceedings of the 27th IEEE International Conference on Network Protocols (ICNP '19), October 7-10, 2019, Chicago, IL, USA Chicago, IL, USA 27th IEEE International Conference on Network Protocols (ICNP 2019) 7-10. Oct. 2019 978-1-7281-2700-2 2643-3303 10.1109/ICNP.2019.8888029 1 JanPennekamp JensHiller SebastianReuter WladimirDe la Cadena AsyaMitseva MartinHenze ThomasEngel KlausWehrle AndriyPanchenko inproceedings 2019-krude-chain-opt 2019 8 23 With the move of Software-defined networking from fixed to programmable data planes, network functions are written with P4 or eBPF for targets such as programmable switches, CPU based flow processors and commodity CPUs. These data plane programs are, however, limited in per-packet time budget (e.g., 67.2 ns at 10GbE) and program size, making program optimization imperative. Existing approaches focus on optimizing the distribution of flow rules in fixed data planes or they are limited to a single switch. We see great potential in integrating the network topology into program optimization. maki https://www.comsys.rwth-aachen.de/fileadmin/papers/2019/2019-krude-chain-opt.pdf ACM NetPL '19: ACM SIGCOMM Workshop on Networking and Programming Languages Beijing, China 978-1-4503-6877-3/19/08 10.1145/3341561.3349590 1 JohannesKrude MatthiasEichholz MaximilianWinck KlausWehrle MiraMezini inproceedings ReelfsMHH2019 2019 5 13 919-927 Anonymous Messaging; Location Based Messaging; User Behavior and Engagement; Information Diffusion; Hashtag comtex https://www.comsys.rwth-aachen.de/fileadmin/papers/2019/2019-reelfs-jodel-hashtags.pdf ACM Companion Proceedings of the 2019 World Wide Web Conference (WWW '19 Companion), 9th International Workshop on Location and the Web (LocWeb '19), May 13–17, 2019, San Francisco, CA, USA San Francisco, California, USA International Workshop on Location and the Web May 13–17, 2019 978-1-4503-6675-5/19/05 10.1145/3308560.3316537 1 HelgeReelfs TimonMohaupt OliverHohlfeld NiklasHenckell inproceedings 2019_pennekamp_infrastructure 2019 5 8 31-37 New levels of cross-domain collaboration between manufacturing companies throughout the supply chain are anticipated to bring benefits to both suppliers and consumers of products. Enabling a fine-grained sharing and analysis of data among different stakeholders in an automated manner, such a vision of an Internet of Production (IoP) introduces demanding challenges to the communication, storage, and computation infrastructure in production environments. In this work, we present three example cases that would benefit from an IoP (a fine blanking line, a high pressure die casting process, and a connected job shop) and derive requirements that cannot be met by today’s infrastructure. In particular, we identify three orthogonal research objectives: (i) real-time control of tightly integrated production processes to offer seamless low-latency analysis and execution, (ii) storing and processing heterogeneous production data to support scalable data stream processing and storage, and (iii) secure privacy-aware collaboration in production to provide a basis for secure industrial collaboration. Based on a discussion of state-of-the-art approaches for these three objectives, we create a blueprint for an infrastructure acting as an enabler for an IoP. Internet of Production; Cyber-Physical Systems; Data Processing; Low Latency; Secure Industrial Collaboration internet-of-production https://www.comsys.rwth-aachen.de/fileadmin/papers/2019/2019-pennekamp-iop-infrastructure.pdf IEEE Proceedings of the 2nd IEEE International Conference on Industrial Cyber-Physical Systems (ICPS '19), May 6-9, 2019, Taipei, TW Taipei, TW May 6-9, 2019 978-1-5386-8500-6/19 10.1109/ICPHYS.2019.8780276 1 JanPennekamp RenéGlebke MartinHenze TobiasMeisen ChristophQuix RihanHai LarsGleim PhilippNiemietz MaximilianRudack SimonKnape AlexanderEpple DanielTrauth UweVroomen ThomasBergs ChristianBrecher AndreasBührig-Polaczek MatthiasJarke KlausWehrle inproceedings 2019_wagner_dispute_resolution 2019 5 Blockchain systems promise to mediate interactions of mutually distrusting parties without a trusted third party. However, protocols with full smart contract-based security are either limited in functionality or complex, with high costs for secured interactions. This observation leads to the development of protocol-specific schemes to avoid costly dispute resolution in case all participants remain honest. In this paper, we introduce SmartJudge, an extensible generalization of this trend for smart contract-based two-party protocols. SmartJudge relies on a protocol-independent mediator smart contract that moderates two-party interactions and only consults protocol-specific verifier smart contracts in case of a dispute. This way, SmartJudge avoids verification costs in absence of disputes and sustains interaction confidentiality among honest parties. We implement verifier smart contracts for cross-blockchain trades and exchanging digital goods and show that SmartJudge can reduce costs by 46-50% and 22% over current state of the art, respectively. Ethereum,Bitcoin,smart contracts,two-party protocols,dispute resolution,cross-blockchain trades mynedata,impact-digital https://www.comsys.rwth-aachen.de/fileadmin/papers/2019/2019-wagner-dispute.pdf IEEE IEEE International Conference on Blockchain and Cryptocurrency 2019 (ICBC 2019) Seoul, South Korea IEEE International Conference on Blockchain and Cryptocurrency 2019 English 10.1109/BLOC.2019.8751312 1 EricWagner AchimVölker FrederikFuhrmann RomanMatzutt KlausWehrle inproceedings 2019-glebke-hicss-integrated 2019 1 8 7252-7261 internet-of-production,reflexes https://www.comsys.rwth-aachen.de/fileadmin/papers/2019/2019-glebke-integrated.pdf Online University of Hawai'i at Manoa / AIS Proceedings of the 52nd Hawaii International Conference on System Sciences (HICSS), Wailea, HI, USA en 978-0-9981331-2-6 10.24251/HICSS.2019.871 1 RenéGlebke MartinHenze KlausWehrle PhilippNiemietz DanielTrauth PatrickMattfeld ThomasBergs inproceedings 2018-bader-ethereum-car-insurance 2018 12 9 mynedata,iop https://www.comsys.rwth-aachen.de/fileadmin/papers/2018/2018-bader-ethereum-car-insurance.pdf https://ieeexplore.ieee.org/document/8644136 IEEE 2018 IEEE Globecom Workshops (GC Wkshps) Abu Dhabi, United Arab Emirates 1st International Workshop on Blockchain in IoT, co-located with IEEE Globecom 2018 2018-12-09 10.1109/GLOCOMW.2018.8644136 1 LennartBader Jens ChristophBürger RomanMatzutt KlausWehrle inproceedings 2018-ziegeldorf-shield 2018 12 1-15 iop,mynedata https://www.comsys.rwth-aachen.de/fileadmin/papers/2018/2018-ziegeldorf-acsac-shield.pdf ACM

New York, NY, USA

Proceedings of the 34rd Annual Computer Security Applications Conference San Juan, Puerto Rico, USA The 34rd Annual Computer Security Applications Conference (ACSAC 2018) 2018-12-03 - 2018-12-07 English 10.1145/3274694.3274716 1 Jan HenrikZiegeldorf JanMetzke KlausWehrle inproceedings 2018-matzutt-bitcoin-content-countermeasures 2018 4 17 364-370 Since the introduction of Bitcoin in 2008, blockchain systems have seen an enormous increase in adoption. By providing a persistent, distributed, and append-only ledger, blockchains enable numerous applications such as distributed consensus, robustness against equivocation, and smart contracts. However, recent studies show that blockchain systems such as Bitcoin can be (mis)used to store arbitrary content. This has already been used to store arguably objectionable content on Bitcoin's blockchain. Already single instances of clearly objectionable or even illegal content can put the whole system at risk by making its node operators culpable. To overcome this imminent risk, we survey and discuss the design space of countermeasures against the insertion of such objectionable content. Our analysis shows a wide spectrum of potential countermeasures, which are often combinable for increased efficiency. First, we investigate special-purpose content detectors as an ad hoc mitigation. As they turn out to be easily evadable, we also investigate content-agnostic countermeasures. We find that mandatory minimum fees as well as mitigation of transaction manipulability via identifier commitments significantly raise the bar for inserting harmful content into a blockchain. Bitcoin,blockchain,security,objectionable content,countermeasure mynedata,iop https://www.comsys.rwth-aachen.de/fileadmin/papers/2018/2018-matzutt-blockchain-contents-countermeasures.pdf https://ieeexplore.ieee.org/document/8360355 IEEE Proceedings of the First IEEE Workshop on Blockchain Technologies and Applications (BTA), co-located with the IEEE International Conference on Cloud Engineering 2018 (IC2E 2018) Orlando, Florida, USA First IEEE Workshop on Blockchain Technologies and Applications (BTA) 2018-04-17 English 978-1-5386-5008-0 10.1109/IC2E.2018.00070 1 RomanMatzutt MartinHenze Jan HenrikZiegeldorf JensHiller KlausWehrle article 2018-scheitle-ccr-caa ACM SIGCOMM Computer Communications Review (CCR) 2018 4 48 10-23 https://www.net.in.tum.de/fileadmin/bibtex/publications/papers/caa17.pdf internet-measurements https://ccronline.sigcomm.org/wp-content/uploads/2018/05/sigcomm-ccr-final163.pdf https://ccronline.sigcomm.org/2018/a-first-look-at-certification-authority-authorization-caa/ 2018-06-05 10.1145/3213232.3213235 1 QuirinScheitle TaejoongChung JensHiller OliverGasser JohannesNaab Rolandvan Rijswijk-Deij OliverHohlfeld RalphHolz DaveChoffnes AlanMislove GeorgCarle article 2016-fgcs-ziegeldorf-bitcoin Future Generation Computer Systems 2018 3 80 448-466 Pseudonymity, anonymity, and untraceability https://www.comsys.rwth-aachen.de/fileadmin/papers/2018/2018-ziegeldorf-fgcs-bitcoin.pdf Online Elsevier en 0167-739X 10.1016/j.future.2016.05.018 1 Jan HenrikZiegeldorf RomanMatzutt MartinHenze FredGrossmann KlausWehrle inproceedings 2018-matzutt-bitcoin-content 2018 2 26 Blockchains primarily enable credible accounting of digital events, e.g., money transfers in cryptocurrencies. However, beyond this original purpose, blockchains also irrevocably record arbitrary data, ranging from short messages to pictures. This does not come without risk for users as each participant has to locally replicate the complete blockchain, particularly including potentially harmful content. We provide the first systematic analysis of the benefits and threats of arbitrary blockchain content. Our analysis shows that certain content, e.g., illegal pornography, can render the mere possession of a blockchain illegal. Based on these insights, we conduct a thorough quantitative and qualitative analysis of unintended content on Bitcoin's blockchain. Although most data originates from benign extensions to Bitcoin's protocol, our analysis reveals more than 1600 files on the blockchain, over 99% of which are texts or images. Among these files there is clearly objectionable content such as links to child pornography, which is distributed to all Bitcoin participants. With our analysis, we thus highlight the importance for future blockchain designs to address the possibility of unintended data insertion and protect blockchain users accordingly. mynedata https://www.comsys.rwth-aachen.de/fileadmin/papers/2018/2018_matzutt_bitcoin-contents_preproceedings-version.pdf 2018-01-07 Online Springer Proceedings of the 22nd International Conference on Financial Cryptography and Data Security (FC), Nieuwpoort, Curaçao Nieuwpoort, Curaçao Financial Cryptography and Data Security 2018 en 10.1007/978-3-662-58387-6_23 1 RomanMatzutt JensHiller MartinHenze Jan HenrikZiegeldorf DirkMüllmann OliverHohlfeld KlausWehrle inproceedings 2018-dedin-energy-packets 2018 Proceedings of the Ninth International Conference on Future Energy Systems (ACM e-Energy '18) Karlsruhe, Germany Ninth International Conference on Future Energy Systems 2018-06-15 10.1145/3208903.3208931 1 EdoardoDe Din AntonelloMonti VeitHagenmeyer KlausWehrle incollection 2017-cps-henze-network 2017 11 13 25-56 sensorcloud,ipacs Song, Houbing and Fink, Glenn A. and Jeschke, Sabina Wiley-IEEE Press First 2 Security and Privacy in Cyber-Physical Systems: Foundations, Principles and Applications en 978-1-119-22604-8 10.1002/9781119226079.ch2 1 MartinHenze JensHiller RenéHummen RomanMatzutt KlausWehrle Jan HenrikZiegeldorf inproceedings 2017-henze-mobiquitous-cloudanalyzer 2017 11 7 262-271 Developers of smartphone apps increasingly rely on cloud services for ready-made functionalities, e.g., to track app usage, to store data, or to integrate social networks. At the same time, mobile apps have access to various private information, ranging from users' contact lists to their precise locations. As a result, app deployment models and data flows have become too complex and entangled for users to understand. We present CloudAnalyzer, a transparency technology that reveals the cloud usage of smartphone apps and hence provides users with the means to reclaim informational self-determination. We apply CloudAnalyzer to study the cloud exposure of 29 volunteers over the course of 19 days. In addition, we analyze the cloud usage of the 5000 most accessed mobile websites as well as 500 popular apps from five different countries. Our results reveal an excessive exposure to cloud services: 90 % of apps use cloud services and 36 % of apps used by volunteers solely communicate with cloud services. Given the information provided by CloudAnalyzer, users can critically review the cloud usage of their apps. Privacy; Smartphones; Cloud Computing; Traffic Analysis trinics https://www.comsys.rwth-aachen.de/fileadmin/papers/2017/2017-henze-mobiquitous-cloudanalyzer.pdf Online ACM Proceedings of the 14th EAI International Conference on Mobile and Ubiquitous Systems: Computing, Networking and Services (MobiQuitous '17), November 7-10, 2017, Melbourne, VIC, Australia Melbourne, VIC, Australia November 7-10, 2017 en 978-1-4503-5368-7 10.1145/3144457.3144471 1 MartinHenze JanPennekamp DavidHellmanns ErikMühmer Jan HenrikZiegeldorf ArthurDrichel KlausWehrle inproceedings 2017-panchenko-wpes-fingerprinting 2017 10 30 https://www.comsys.rwth-aachen.de/fileadmin/papers/2017/2017-panchenko-wpes-fingerprinting.pdf Online ACM Proceedings of the 16th Workshop on Privacy in the Electronic Society (WPES), co-located with the 24th ACM Conference on Computer and Communications Security (CCS), Dallas, TX, USA en 978-1-4503-5175-1 10.1145/3139550.3139564 1 AndriyPanchenko AsyaMitseva MartinHenze FabianLanze KlausWehrle ThomasEngel inproceedings 2017-henze-trustcom-dcam 2017 8 1 185-192 sscilops, ipacs https://www.comsys.rwth-aachen.de/fileadmin/papers/2017/2017-henze-trustcom-dcam.pdf Online IEEE Proceedings of the 16th IEEE International Conference on Trust, Security and Privacy in Computing and Communications (IEEE TrustCom), Sydney, NSW, Australia en 978-1-5090-4905-9 2324-9013 10.1109/Trustcom/BigDataSE/ICESS.2017.236 1 MartinHenze BenediktWolters RomanMatzutt TorstenZimmermann KlausWehrle inproceedings 2017-maurer-trustcom-coinjoin 2017 8 1 522-529 https://www.comsys.rwth-aachen.de/fileadmin/papers/2017/2017-maurer-trustcom-coinjoin.pdf Online IEEE 2017 IEEE Trustcom/BigDataSE/ICESS Sydney, NSW, Australia 16th IEEE International Conference on Trust, Security and Privacy in Computing and Communications (IEEE TrustCom) 1. - 4. August 2017 978-1-5090-4906-6 2324-9013 10.1109/Trustcom/BigDataSE/ICESS.2017.280 1 Felix KonstantinMaurer TillNeudecker MartinFlorian article 2017-ziegeldorf-bmcmedgenomics-bloom BMC Medical Genomics 2017 7 26 10 Suppl 2 29-42 Whole genome sequencing has become fast, accurate, and cheap, paving the way towards the large-scale collection and processing of human genome data. Unfortunately, this dawning genome era does not only promise tremendous advances in biomedical research but also causes unprecedented privacy risks for the many. Handling storage and processing of large genome datasets through cloud services greatly aggravates these concerns. Current research efforts thus investigate the use of strong cryptographic methods and protocols to implement privacy-preserving genomic computations. We propose FHE-Bloom and PHE-Bloom, two efficient approaches for genetic disease testing using homomorphically encrypted Bloom filters. Both approaches allow the data owner to securely outsource storage and computation to an untrusted cloud. FHE-Bloom is fully secure in the semi-honest model while PHE-Bloom slightly relaxes security guarantees in a trade-off for highly improved performance. We implement and evaluate both approaches on a large dataset of up to 50 patient genomes each with up to 1000000 variations (single nucleotide polymorphisms). For both implementations, overheads scale linearly in the number of patients and variations, while PHE-Bloom is faster by at least three orders of magnitude. For example, testing disease susceptibility of 50 patients with 100000 variations requires only a total of 308.31 s (σ=8.73 s) with our first approach and a mere 0.07 s (σ=0.00 s) with the second. We additionally discuss security guarantees of both approaches and their limitations as well as possible extensions towards more complex query types, e.g., fuzzy or range queries. Both approaches handle practical problem sizes efficiently and are easily parallelized to scale with the elastic resources available in the cloud. The fully homomorphic scheme, FHE-Bloom, realizes a comprehensive outsourcing to the cloud, while the partially homomorphic scheme, PHE-Bloom, trades a slight relaxation of security guarantees against performance improvements by at least three orders of magnitude. Proceedings of the 5th iDASH Privacy and Security Workshop 2016 Secure outsourcing; Homomorphic encryption; Bloom filters sscilops; mynedata https://www.comsys.rwth-aachen.de/fileadmin/papers/2017/2017-ziegeldorf-bmcmedgenomics-bloom.pdf Online BioMed Central Chicago, IL, USA November 11, 2016 en 1755-8794 10.1186/s12920-017-0277-y 1 Jan HenrikZiegeldorf JanPennekamp DavidHellmanns FelixSchwinger IkeKunze MartinHenze JensHiller RomanMatzutt KlausWehrle article dombrowski-vdi VDE Positionspapier 2017 6 1 VDE - Verband der Elektrotechnik, Elektronik, Informationstechnik e.V.

Stresemannallee 15, 60596 Frankfurt am Main, Germany

IsmetAktas AlexanderBentkus FlorianBonanati ArminDekorsy ChristianDombrowski MichaelDoubrava AliGolestani FrankHofmann MikeHeidrich StefanHiensch RüdigerKays MichaelMeyer AndreasMüller Stephanten Brink NedaPetreska MilanPopovic LutzRauchhaupt AhmadSaad HansSchotten ChristophWöste IngoWolff inproceedings 2017-henze-ic2e-prada 2017 4 4 252-258 ssiclops, ipacs https://www.comsys.rwth-aachen.de/fileadmin/papers/2017/2017-henze-ic2e-prada.pdf Online IEEE Proceedings of the 2017 IEEE International Conference on Cloud Engineering (IC2E 2017), Vancouver, BC, Canada en 978-1-5090-5817-4 10.1109/IC2E.2017.32 1 MartinHenze RomanMatzutt JensHiller ErikMühmer Jan HenrikZiegeldorf Johannesvan der Giet KlausWehrle inproceedings 2017-ziegeldorf-codaspy-priward 2017 3 22 83-94 mynedata https://www.comsys.rwth-aachen.de/fileadmin/papers/2017/2017-ziegeldorf-codaspy-priward.pdf Online ACM Proceedings of the 7th ACM Conference on Data and Application Security and Privacy (CODASPY 2017), Scottsdale, AZ, USA en 978-1-4503-4523-1 10.1145/3029806.3029816 1 Jan HenrikZiegeldorf JanMetzke JanRüth MartinHenze KlausWehrle inproceedings 2017-matzutt-mynedata 2017 1073-1084 Personal user data is collected and processed at large scale by a handful of big providers of Internet services. This is detrimental to users, who often do not understand the privacy implications of this data collection, as well as to small parties interested in gaining insights from this data pool, e.g., research groups or small and middle-sized enterprises. To remedy this situation, we propose a transparent and user-controlled data market in which users can directly and consensually share their personal data with interested parties for monetary compensation. We define a simple model for such an ecosystem and identify pressing challenges arising within this model with respect to the user and data processor demands, legal obligations, and technological limits. We propose myneData as a conceptual architecture for a trusted online platform to overcome these challenges. Our work provides an initial investigation of the resulting myneData ecosystem as a foundation to subsequently realize our envisioned data market via the myneData platform. Presentation slides are in German Personal User Data, Personal Information Management, Data Protection Laws, Privacy Enhancing Technologies, Platform Design, Profiling mynedata_show https://www.comsys.rwth-aachen.de/fileadmin/papers/2017/2017-matzutt-informatik-mynedata.pdf https://www.comsys.rwth-aachen.de/fileadmin/misc/mynedata/talks/2017-matzutt-informatik-mynedata-presentation.pdf Presentation slides Eibl, Maximilian and Gaedke, Martin Gesellschaft für Informatik, Bonn INFORMATIK 2017 Chemnitz INFORMATIK 2017 2017-09-28 English 978-3-88579-669-5 1617-5468 10.18420/in2017_109 1 RomanMatzutt DirkMüllmann Eva-MariaZeissig ChristianeHorst KaiKasugai SeanLidynia SimonWieninger Jan HenrikZiegeldorf GerhardGudergan IndraSpiecker gen. Döhmann KlausWehrle MartinaZiefle inproceedings 2016-henze-cloudcom-trinics 2016 12 12 366-370 trinics https://www.comsys.rwth-aachen.de/fileadmin/papers/2016/2016-henze-cloudcom-trinics.pdf Online IEEE Proceedings of the 2016 IEEE International Conference on Cloud Computing Technology and Science (CloudCom), Luxembourg, Luxembourg en 978-1-5090-1445-3 10.1109/CloudCom.2016.0064 1 MartinHenze DanielKerpen JensHiller MichaelEggert DavidHellmanns ErikMühmer OussamaRenuli HenningMaier ChristianStüble RogerHäußling KlausWehrle inproceedings 2016-mitseva-ccs-fingerprinting 2016 10 24 1766-1768 https://www.comsys.rwth-aachen.de/fileadmin/papers/2016/2016-mitseva-ccs-fingerprinting.pdf Online ACM Proceedings of the 23rd ACM Conference on Computer and Communications Security (CCS), Vienna, Austria en 978-1-4503-4139-4 10.1145/2976749.2989054 1 AsyaMitseva AndriyPanchenko FabianLanze MartinHenze KlausWehrle ThomasEngel inproceedings 2016-matzutt-ccs-bitcoin 2016 10 24 1769-1771 mynedata /fileadmin/papers/2016/2016-matzutt-ccs-blockchaincontent.pdf Online ACM Proceedings of the 23rd ACM Conference on Computer and Communications Security (CCS), Vienna, Austria en 978-1-4503-4139-4 10.1145/2976749.2989059 1 RomanMatzutt OliverHohlfeld MartinHenze RobinRawiel Jan HenrikZiegeldorf KlausWehrle techreport 2016-henze-aib-sensorcloud 2016 7 11 AIB-2016-06 arXiv:1607.03239 [cs.NI] 1--24 sensorcloud fileadmin/papers/2016/2016-henze-aib-sensorcloud.pdf Online Department of Computer Science, RWTH Aachen University

Ahornstr. 55, 52074 Aachen, Germany

Department of Computer Science, RWTH Aachen University Technical Report en 0935-3232 MartinHenze RenéHummen RomanMatzutt KlausWehrle proceedings 2016-Jakobs-EURAS 2016 5 Online Mainz EN 978-3-95886-103-9 1 KaiJakobs AnneMione Anne-FrancoiseCutting-Decelle SophieMignon techreport 2015-draft-moskowitz-hip-dex-04 2015 7 20 draft-moskowitz-hip-dex-04 This document specifies the Host Identity Protocol Diet EXchange (HIP DEX), a variant of the Host Identity Protocol Version 2 (HIPv2). The HIP DEX protocol design aims at reducing the overhead of the employed cryptographic primitives by omitting public-key signatures and hash functions. In doing so, the main goal is to still deliver similar security properties to HIPv2. The HIP DEX protocol is primarily designed for computation or memory-constrained sensor/actuator devices. Like HIPv2, it is expected to be used together with a suitable security protocol such as the Encapsulated Security Payload (ESP) for the protection of upper layer protocol data. In addition, HIP DEX can also be used as a keying mechanism for security primitives at the MAC layer, e.g., for IEEE 802.15.4 networks. Work in progress iotsec; ietf http://tools.ietf.org/html/draft-moskowitz-hip-dex-04 Online Internet Engineering Task Force Internet-Draft en RobertMoskowitz RenéHummen techreport 2015-draft-moskowitz-hip-dex-03 2015 6 19 draft-moskowitz-hip-dex-03 This document specifies the Host Identity Protocol Diet EXchange (HIP DEX), a variant of the Host Identity Protocol Version 2 (HIPv2). The HIP DEX protocol design aims at reducing the overhead of the employed cryptographic primitives by omitting public-key signatures and hash functions. In doing so, the main goal is to still deliver similar security properties to HIPv2. The HIP DEX protocol is primarily designed for computation or memory-constrained sensor/actuator devices. Like HIPv2, it is expected to be used together with a suitable security protocol such as the Encapsulated Security Payload (ESP) for the protection of upper layer protocol data. In addition, HIP DEX can also be used as a keying mechanism for security primitives at the MAC layer, e.g., for IEEE 802.15.4 networks. Work in progress iotsec; ietf http://tools.ietf.org/html/draft-moskowitz-hip-dex-03 Online Internet Engineering Task Force Internet-Draft en RobertMoskowitz RenéHummen inproceedings 2015-ziegeldorf-iwpe-comparison 2015 5 21 198-205 https://www.comsys.rwth-aachen.de/fileadmin/papers/2015/2015-ziegeldorf-iwpe-choose.pdf Online IEEE 2015 International Workshop on Privacy Engineering (IWPE'15), part of 2015 IEEE Security and Privacy Workshops (SPW 2015), San Jose, CA, USA en 10.1109/SPW.2015.9 1 Jan HenrikZiegeldorf JanMetzke MartinHenze KlausWehrle proceedings 2015-sdnflex-heuschkel-dyns 2015 3 9 IEEE Cottbus SDNFlex Workshop (NetSys 2015) March 2015, 9-12 en 10.1109/NetSys.2015.7089055 1 JensHeuschkel ImmanuelSchweizer TorstenZimmermann KlausWehrle MaxMühlhäuser techreport 2014-draft-moskowitz-hip-dex-02 2014 12 19 draft-moskowitz-hip-dex-02 This document specifies the Host Identity Protocol Diet EXchange (HIP DEX), a variant of the Host Identity Protocol Version 2 (HIPv2). The HIP DEX protocol design aims at reducing the overhead of the employed cryptographic primitives by omitting public-key signatures and hash functions. In doing so, the main goal is to still deliver similar security properties to HIPv2. The HIP DEX protocol is primarily designed for computation or memory-constrained sensor/actuator devices. Like HIPv2, it is expected to be used together with a suitable security protocol such as the Encapsulated Security Payload (ESP) for the protection of upper layer protocol data. In addition, HIP DEX can also be used as a keying mechanism for security primitives at the MAC layer, e.g., for IEEE 802.15.4 networks. Work in progress iotsec; ietf http://tools.ietf.org/html/draft-moskowitz-hip-dex-02 Online Internet Engineering Task Force Internet-Draft en RobertMoskowitz RenéHummen incollection 2014-tcc-henze-trustpoint 2014 12 14 77-106 sensorcloud Online Krcmar, Helmut and Reussner, Ralf and Rumpe, Bernhard Springer Trusted Cloud Computing 978-3-319-12717-0 10.1007/978-3-319-12718-7_6 1 MartinHenze RenéHummen RomanMatzutt KlausWehrle article 2014-cheng-acta-geodyn-geomater Acta Geodynamica et Geomaterialia 2014 10 8 11 4 1--12 Accelerometer and inclinometer are inertial sensors capable of measuring corresponding magnitude of Earth gravitational field along the direction of each axis. By means of rotation matrices related to inertial navigation methods, the output values of a three-dimensional accelerometer or a two-dimensional inclinometer can be transformed and processed into the azimuth and dip angle of the monitored target. With the rapid growth in development and cost reduction of Micro Electro Mechanical Systems (MEMS) and Wireless Sensor Network (WSN) in recent years, the engineers are able to carry out real-time wireless geotechnical monitoring during construction. In this paper, we set up a one-day measurement implemented by a self- developed wireless MEMS monitoring system on the surface in the construction site of South Hongmei Road super high way tunnel in Shanghai, by making use of rotation matrices in specific ways, the raw data are processed to expressions of three-dimensional normal vectors that represent the change of the ground. After unifying the vectors in the same coordinate system, we conduct a brief ground settlement analysis by means of an evaluation of the dip angles in the cross section and the azimuths of the sensor nodes. http://www.irsm.cas.cz/index_en.php?page=acta_detail_doi&id=96 Online Institute of Rock Structure and Mechanics of the ASCR, v.v.i.

Prague, Czech Republic

Online en 2336-4351 10.13168/AGG.2014.0015 1 ChengLi TomásFernández-Steeger Jó AgilaBitsch Link MatthiasMay RafigAzzam techreport 2014-draft-moskowitz-hip-dex-01 2014 3 4 draft-moskowitz-hip-dex-01 This document specifies the Host Identity Protocol Diet EXchange (HIP DEX), a variant of the HIP Base EXchange (HIP BEX) [rfc5201-bis]. The HIP DEX protocol design aims at reducing the overhead of the employed cryptographic primitives by omitting public-key signatures and hash functions. In doing so, the main goal is to still deliver similar security properties to HIP BEX. The HIP DEX protocol is primarily targeted at computation or memory-constrained sensor devices. Like HIP BEX, it is expected to be used together with another suitable security protocol such as the Encapsulated Security Payload (ESP) [rfc5202-bis] for the protection of upper layer protocols. HIP DEX can also be used as a keying mechanism for a MAC layer security protocol as is supported by IEEE 802.15.4 [IEEE.802-15-4.2011]. Work in progress iotsec; ietf http://tools.ietf.org/html/draft-moskowitz-hip-dex-01 Online Internet Engineering Task Force Internet-Draft en RobertMoskowitz RenéHummen inproceedings 2014-comsnets-aktas-graph-based-redundancy-removal 2014 1 7 1-8 crawler http://www.comsys.rwth-aachen.de/fileadmin/papers/2014/2014-aktas-comsnets-redundancy.pdf Online IEEE Proceedings of the 2014 Sixth International Conference on Communication Systems and Networks (COMSNETS), Bangalore, India Bangalore, India 2014 Sixth International Conference on Communication Systems and Networks (COMSNETS) 7-10 January, 2014 en 978-1-4799-3635-9 10.1109/COMSNETS.2014.6734899 1 IsmetAktas MartinHenze Muhammad HamadAlizai KevinMöllering KlausWehrle book 2014-EURAS-Jakobs 2014 Kai Jakobs & Ivana Mijatovic Mainz Academic Publisher KaiJakobs IvanaMijatovic article 2013-ijghpc-henze-sensorcloud International Journal of Grid and High Performance Computing (IJGHPC) 2013 12 5 4 97-112 sensorcloud fileadmin/papers/2013/2013-ijghpc-henze-sensorcloud.pdf Online IGI Global en 1938-0259 10.4018/ijghpc.2013100107 1 MartinHenze RenéHummen RomanMatzutt DanielCatrein KlausWehrle inproceedings 2013-wisec-garcia-securing 2013 4 119--124 ACM Proceedings of the 6th ACM Conference on Security and Privacy in Wireless and Mobile Networks (WiSec '13) (short paper) 978-1-4503-1998-0 10.1145/2462096.2462117 1 OscarGarcia-Morchon Sye LoongKeoh Sandeep S.Kumar PedroMoreno-Sanchez FranciscoVidal-Meca Jan HenrikZiegeldorf inproceedings 2013-pitsac-vidalmeca-hip 2013 3 25 1331 - 1336 The IP-based Internet of Things refers to the pervasive interactions of smart objects and people enabling new applications by means of IP protocols. An application scenario is a Smart City in which the city infrastructure, cars, and people exchange information to enable new services. IP protocols, such as IPv6, TCP and HTTP will be further complemented by IPv6 over Low powerWireless Personal Area Networks and Constrained Application Protocol currently in development in IETF. Security and privacy are a must for the IP-based IoTs in order to ensure its acceptance. However, mobility, limited bandwidth, and resource-constrained devices pose new challenges and require for a sound and efficient security architecture. In particular, dynamic association of mobile smart objects and the management of keys in large-scale networks remain an open challenge. In this context, we propose a flexible security architecture based on the Host Identity Protocol and Multimedia Internet KEYing protocols allowing for secure network association and key management. HIP - based on asymmetric-key cryptography - ensures unambiguous thing identification, mobility support, as well as a lightweight and secure method for network association. In our solution, HIP is extended with MIKEY capabilities to provide enhanced key management using polynomials, which allow to generate pairwise keys with any node based on its identity. This combination of protocols and crypto-algorithms ensures both strong security and very good performance as shown by our implementation and presents clear advantages compared with other alternatives. Internet of Things; Security; Network Access; Key Management Online IEEE Proceedings of the 27th International Conference on Advanced Information Networking and Applications Workshops (WAINA), 2013 Barcelona, Spain 25.-28.03.2013 en 10.1109/WAINA.2013.158 1 FranciscoVidal Meca Jan HenrikZiegeldorf OscarGarcia-Morchon Sandeep S.Kumar Sye LoongKeoh PedroMoreno-Sanchez article 2013-fernandez-ceriotti-bitsch-and-then-the-weekend-jsan Journal of Sensor and Actuator Networks 2013 3 11 2 1 156--171 Wireless Sensor Networks (WSNs) are versatile monitoring systems that can provide a large amount of real-time data in scenarios where wired infrastructures are inapplicable or expensive. This technology is expected to be handled by domain experts, who perceive a WSN as a (promised to be) easy to deploy black box. This work presents the deployment experience of a WSN, as conducted by domain experts, in a ground improvement area. Building upon off-the-shelf solutions, a fuel cell powered gateway and 21 sensor devices measuring acceleration, inclination, temperature and barometric pressure were installed to monitor ground subsidence. We report about how poor GSM service, malfunctioning hardware, unknown communication patterns and obscure proprietary software required in-field ad-hoc solutions. Through the lessons learned, we look forward to investigating how to make the deployment of these systems an easier task. sensor network deployment; experiences; in-field debugging http://www.mdpi.com/2224-2708/2/1/156 Online en 2224-2708 10.3390/jsan2010156 1 TomásFernández-Steeger MatteoCeriotti Jó AgilaBitsch Link MatthiasMay KlausHentschel KlausWehrle conference EW2013_parruca_gross 2013 8 In this paper we consider the design of semi-static inter-cell interference coordination schemes for LTE networks. In this approach, base stations coordinate the power settings per resource block over long time spans such as seconds. In order to optimize the power settings, one needs to employ models which predict the rate of terminals over the next coordination period under the usage of a given power setting. However, these models are typically quite simple and neglect the impact from fading as well as from dynamic resource allocation performed at the base stations on a millisecond basis. Ignoring such properties of OFDMA networks leads therefore to suboptimal transmit power settings. In this paper, we study the impact from a precise rate prediction model that accurately accounts for fading and dynamic resource allocation. On the down-side, this more precise model leads to a much more involved optimization problem to be solved once per coordination period. We propose two different heuristic methods to deal with this problem. Especially the usage of genetic algorithm results to be promising to counteract the complexity increase. We then study the overall system performance and find precise rate prediction models to be essential for semi-static interference coordination as they provide significant performance improvements in comparison to approaches with simpler models. ICIC, proportional fair scheduling, power mask, resource block, scheduling, dynamic scheduling, inter cell interference coordination, LTE, OFDMA, WiMAX https://www.comsys.rwth-aachen.de/fileadmin/papers/2013/2013_ICIC_parruca_grysla_gross.pdf http://www.vde-verlag.de/proceedings-en/563498043.html vde-verlag vde-verlag

http://www.vde-verlag.de/

Proceedings: European Wireless 2013 Guildford, UK 2013 - 19th European Wireless Conference 04/16/2012 - 04/18/2013 English DonaldParruca MariusGrysla PetriMähönen MarinaPetrova HanZhou FarshadNaghibi JamesGross inproceedings Mobileoffloading_2013 2013 http://arxiv.org/abs/1401.4528 Proc. of MANIAC 2013: Mobile Offloading competition MANIAC 2013 Berlin, Germany DiLi AsyaMitseva inproceedings 2012-mobicom-wirtz-sofi 2012 8 451-454 Online ACM

New York, NY, USA

Proceedings of the 18th ACM Annual International Conference on Mobile Computing and Networking (MobiCom'12), Istanbul, Turkey Istanbul, Turkey 18th ACM Annual International Conference on Mobile Computing and Networking 22-26 August 2012 en 978-1-4503-1159-5 10.1145/2348543.2348608 1 HannoWirtz DavidMartin BenjaminGrap KlausWehrle phdthesis 2011-mochon-phdthesis 2012 Security for Pervasive Healthcare Oscar GarciaMochon techreport rfc5201-bis-04 2011 1 1 draft-ietf-hip-rfc5201-bis-04.txt <prt>expires: July 24, 2011 (work in progress)</prt> mobile_access http://tools.ietf.org/html/draft-ietf-hip-rfc5201-bis-04 Online <prt>IETF Trust</prt> An online version is available at: http://tools.ietf.org/html/draft-ietf-hip-rfc5201-bis-04 Internet Drafts <prt>Internet Engineering Task Force</prt> Internet Engineering Task Force en 1 RobertMoskowitz PetriJokela Thomas R.Henderson TobiasHeer techreport rfc5201-bis-03 2010 10 1 draft-ietf-hip-rfc5201-bis-03.txt <prt>expires: April 26, 2011 (work in progress)</prt> http://tools.ietf.org/html/draft-ietf-hip-rfc5201-bis-03 Online <prt>IETF Trust</prt> An online version is available at: http://tools.ietf.org/html/draft-ietf-hip-rfc5201-bis-03 Internet Drafts <prt>Internet Engineering Task Force</prt> Internet Engineering Task Force en 1 RobertMoskowitz PetriJokela ThomasR. Henderson TobiasHeer techreport rfc5201-bis-01 2010 9 1 draft-ietf-hip-rfc5201-bis-01.txt <prt>expires: March 7, 2011 (work in progress)</prt> http://tools.ietf.org/html/draft-ietf-hip-rfc5201-bis-01 Online <prt>IETF Trust</prt> An online version is available at: http://tools.ietf.org/html/draft-ietf-hip-rfc5201-bis-01 Internet Drafts <prt>Internet Engineering Task Force</prt> Internet Engineering Task Force en 1 RobertMoskowitz PetriJokela ThomasR. Henderson TobiasHeer techreport moskowitz-rfc5201-bis-02 2010 7 1 draft-moskowitz-hip-rfc5201-bis-02.txt <prt>expires: January 2, 2011 (work in progress)</prt> http://tools.ietf.org/html/draft-moskowitz-hip-rfc5201-bis-02 Online <prt>IETF Trust</prt> An online version is available at: http://tools.ietf.org/html/draft-moskowitz-hip-rfc5201-bis-02 Internet Drafts <prt>Internet Engineering Task Force</prt> Internet Engineering Task Force en 1 RobertMoskowitz PetriJokela ThomasR. Henderson TobiasHeer techreport rfc5201-bis-02 2010 7 1 draft-ietf-hip-rfc5201-bis-02.txt <prt>expires: March 7, 2011 (work in progress)</prt> http://tools.ietf.org/html/draft-ietf-hip-rfc5201-bis-02 Online <prt>IETF Trust</prt> An online version is available at: http://tools.ietf.org/html/draft-ietf-hip-rfc5201-bis-02 Internet Drafts <prt>Internet Engineering Task Force</prt> Internet Engineering Task Force en 1 RobertMoskowitz PetriJokela ThomasR. Henderson TobiasHeer inbook 2010-aktas-modeling-application-traffic-bookchapter 2010 4 397-426 Springer 18 Modeling and Tools for Network Simulation 978-3-642-12330-6 IsmetAktas CemMengi ThomasKing techreport moskowitz-rfc5201-bis-01 2010 3 1 draft-moskowitz-hip-rfc5201-bis-01.txt <prt>expires: September 10, 2010 (work in progress)</prt> http://tools.ietf.org/html/draft-moskowitz-hip-rfc5201-bis-01 Online <prt>IETF Trust</prt> An online version is available at: http://tools.ietf.org/html/draft-moskowitz-hip-rfc5201-bis-01 Internet Drafts <prt>Internet Engineering Task Force</prt> Internet Engineering Task Force en 1 RobertMoskowitz Pekka Nikander PetriJokela ThomasR. Henderson TobiasHeer inbook 201001ThieleINTECHRatpack 2010 1 629--644 RatPack http://www.comsys.rwth-aachen.de/fileadmin/papers/2010/2010-01-Thiele-INTECH-Ratpack.pdf http://sciyo.com/articles/show/title/dynamic-wireless-sensor-networks-for-animal-behavior-research http://www.intechopen.com/articles/show/title/dynamic-wireless-sensor-networks-for-animal-behavior-research Online Domenico Campolo InTech

Vienna, Austria

32 Recent Advances in Biomedical Engineering en 978-953-7619-57-2 1 JohannesThiele Jó AgilaBitsch Link OkuaryOsechas HanspeterMallot KlausWehrle inproceedings 20105munawardynamictinyos 2010 1-6 Long-term deployments of sensor networks in physically inaccessible environments make remote re-programmability of sensor nodes a necessity. Ranging from full image replacement to virtual machines, a variety of mechanisms exist today to deploy new software or to fix bugs in deployed systems. However, TinyOS - the current state of the art sensor node operating system - is still limited to full image replacement as nodes execute a statically-linked system-image generated at compilation time. In this paper we introduce Dynamic TinyOS to enable the dynamic exchange of software components and thus incrementally update the operating system and its applications. The core idea is to preserve the modularity of TinyOS, i.e. its componentization, which is lost during the normal compilation process, and enable runtime composition of TinyOS components on the sensor node. The proposed solution integrates seamlessly into the system architecture of TinyOS: It does not require any changes to the programming model of TinyOS and existing components can be reused transparently. Our evaluation shows that Dynamic TinyOS incurs a low performance overhead while keeping a smaller - upto one third - memory footprint than other comparable solutions. fileadmin/papers/2010/2010-05-icc-munawar-DynamicTinyOS.pdf Online IEEE Proceedings of the IEEE International Conference on Communications (ICC), Cape Town, South Africa en 978-1-4244-6402-9 1550-3607 1 WaqaasMunawar Muhammad HamadAlizai OlafLandsiedel KlausWehrle techreport 200908munawarfgsndynamictinyos 2009 9 9-12 fileadmin/papers/2009/2009-08-munawar-fgsn-dynamic-tinyos.pdf http://doku.b.tu-harburg.de/volltexte/2009/581/pdf/proceedings.pdf Print Technical University Hamburg

Technical University Hamburg

Proceedings of the 8th GI/ITG KuVS Fachgespräch "Wireless Sensor Networks", Hamburg, Germany Technical University Hamburg en WaqaasMunawar OlafLandsiedel Muhammad HamadAlizai KlausWehrle proceedings 2009-aktas-maple-ModeldrivenSupportforSourceCodeVariabilityinAutomotiveSoftwareEngineering-Workshop 2009 8 44-51 Variability on source code level in automotive soft- ware engineering is handled by C/C++ preprocessing directives. It provides fine-grained definition of variation points, but brings highly complex structures into the source code. The software gets more difficult to understand, to maintain and to integrate changes. Current approaches for modeling and managing vari- ability on source code do not consider the specific requirements of the automotive domain. To close this gap, we propose a model- driven approach to support software engineers in handling source code variability and configuration of software variants. For this purpose, a variability model is developed that is linked with the source code. Using this approach, a software engineer can shift work steps to the variability model in order to model and manage variation points and implement their variants in the source code. automotive software engineering; programming; model-driven engineering; variability modeling; Online CEUR 1st International Workshop on Model-driven Approaches in Software Product Line Engineering (MAPLE), San Francisco, CA, USA 1613-0073 1 CemMengi ChristianFuß RubenZimmermann IsmetAktas conference 2009-mwns-samad-hsvc 2009 5 15 51-62 Print Shaker Verlag The 2nd International Workshop on Mobile and Wireless Networks Security in conjunction with IFIP NETWORKING 2009, Aachen, Germany. Aachen, Germany International Workshop on Mobile and Wireless Networks Security (MWNS 2009) en 978-3-8322-8177-9 FahadSamad Sadeq AliMakram inbook 2008-thissen-LNCS-synergy 2008 519-526 Print M. Nagl, W. Marquardt Springer Lecture Notes in Computer Science 4970 Collaborative and Distributed Chemical Engineering, From Understanding to Substantial Design Process Support en 978-3-540-70551-2 SimonBecker MarkusHeller MatthiasJarke WolfgangMarquardt ManfredNagl OttoSpaniol DirkThißen inproceedings 200707BitschSNFGRatPack 2007 7 16 2007-11 95 -- 97 The goal of this project is to describe the behaviour of rats. To study this behaviour, we will resort to the use of wireless sensor networks, monitoring various quantities that yield important information to complement current knowledge on the behavioural repertoire of rats. The challenges we face include data acquisition and processing on the one hand, as rat-borne sensor nodes will need to be small enough not to interfere with the rats' own activities, thus limiting the available memory and processing capabilities. Additionally, rats spend a significant amount of time underground, making data transmission and routing a very interesting challenge, for which we are currently developing novel strategies. RatPack fileadmin/papers/2007/2007-07-Bitsch-SNFG-RatPack.pdf Print Klaus Wehrle RWTH Aachen University

Aachen, Germany

AIB 6th GI/ITG KuVS Fachgespräch "Wireless Sensor Networks", Aachen, Germany GI/ITG Fachgruppe "Kommunikation und Verteilte Systeme" Aachen, Germany 6th GI/ITG KuVS Fachgespräch "Wireless Sensor Networks" July 16-17, 2007 en 0935-3232 1 Jó AgilaBitsch Link KlausWehrle OkuaryOsechas JohannesThiele HanspeterMallot inproceedings 200606LandsiedelRatWatch 2006 6 19 1 1--2 In an attempt to employ sensor network technology for animal observation, in particular of wild rats, we identified several restrictive shortcomings in existing sensor network research, which we discuss in this paper. (Poster and Abstract) RatPack fileadmin/papers/2006/2006-06-Landsiedel-RatWatch.pdf http://www.sics.se/realwsn06/program.html Online Pedro José Marron and Thiemo Voigt SICS

Uppsala, Sweden

ACM Workshop on Real-World Wireless Sensor Networks (RealWSN) in conjunction with ACM MobiSys, Uppsala, Sweden ACM Uppsala, Sweden ACM Workshop on Real-World Wireless Sensor Networks, REALWSN'06 June 19, 2006 en 1 OlafLandsiedel Jó AgilaBitsch Link KlausWehrle JohannesThiele HanspeterMallot inproceedings 200504mongerinformatiktage 2005

Schloss Birlinghoven

Proceedings of GI-Informatiktage 2005 AndreasMonger StefanieHofmann JanBronni MarcelKronfeld inbook 1999-thissen-springer-management 1999 371-386 Print M. Nagl, B. Westfechtel Springer Integration von Entwicklungssystemen in Ingenieuranwendungen, Substantielle Verbesserung der Entwicklungsprozesse de 3-540-63920-9 OttoSpaniol DirkThißen BerndMeyer ClaudiaLinnhoff-Popien article 1997-thissen-IM-corba Industrie Management 1997 6 Print de OttoSpaniol BerndMeyer DirkThißen