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@Article { 2024_lohmoeller_sovereignty-survey,
   title = {The Unresolved Need for Dependable Guarantees on Security, Sovereignty, and Trust in Data Ecosystems},
   journal = {Data \& Knowledge Engineering},
   year = {2024},
   month = {5},
   day = {1},
   volume = {151},
   abstract = {Data ecosystems emerged as a new paradigm to facilitate the automated and massive exchange of data from heterogeneous information sources between different stakeholders. However, the corresponding benefits come with unforeseen risks as sensitive information is potentially exposed, questioning their reliability. Consequently, data security is of utmost importance and, thus, a central requirement for successfully realizing data ecosystems. Academia has recognized this requirement, and current initiatives foster sovereign participation via a federated infrastructure where participants retain local control over what data they offer to whom. However, recent proposals place significant trust in remote infrastructure by implementing organizational security measures such as certification processes before the admission of a participant. At the same time, the data sensitivity incentivizes participants to bypass the organizational security measures to maximize their benefit. This issue significantly weakens security, sovereignty, and trust guarantees and highlights that organizational security measures are insufficient in this context. In this paper, we argue that data ecosystems must be extended with technical means to (re)establish dependable guarantees. We underpin this need with three representative use cases for data ecosystems, which cover personal, economic, and governmental data, and systematically map the lack of dependable guarantees in related work. To this end, we identify three enablers of dependable guarantees, namely trusted remote policy enforcement, verifiable data tracking, and integration of resource-constrained participants. These enablers are critical for securely implementing data ecosystems in data-sensitive contexts.},
   keywords = {Data sharing; Confidentiality; Integrity protection; Data Markets; Distributed databases},
   tags = {internet-of-production; coat-ers},
   url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2024/2024-lohmoeller-data-sovereignty-survey.pdf},
   publisher = {Elsevier},
   ISSN = {0169-023X},
   DOI = {10.1016/j.datak.2024.102301},
   reviewed = {1},
   author = {Lohm{\"o}ller, Johannes and Pennekamp, Jan and Matzutt, Roman and Schneider, Carolin Victoria and Vlad, Eduard and Trautwein, Christian and Wehrle, Klaus}
}

@Incollection { 2024_pennekamp_blockchain-industry,
   title = {Blockchain Technology Accelerating Industry 4.0},
   year = {2024},
   month = {3},
   day = {7},
   volume = {105},
   pages = {531-564},
   abstract = {Competitive industrial environments impose significant requirements on data sharing as well as the accountability and verifiability of related processes. Here, blockchain technology emerges as a possible driver that satisfies demands even in settings with mutually distrustful stakeholders. We identify significant benefits achieved by blockchain technology for Industry 4.0 but also point out challenges and corresponding design options when applying blockchain technology in the industrial domain. Furthermore, we survey diverse industrial sectors to shed light on the current intersection between blockchain technology and industry, which provides the foundation for ongoing as well as upcoming research. As industrial blockchain applications are still in their infancy, we expect that new designs and concepts will develop gradually, creating both supporting tools and groundbreaking innovations.},
   tags = {internet-of-production},
   publisher = {Springer},
   series = {Advances in Information Security},
   chapter = {17},
   booktitle = {Blockchains – A Handbook on Fundamentals, Platforms and Applications},
   ISBN = {978-3-031-32145-0},
   DOI = {10.1007/978-3-031-32146-7_17},
   reviewed = {1},
   author = {Pennekamp, Jan and Bader, Lennart and Wagner, Eric and Hiller, Jens and Matzutt, Roman and Wehrle, Klaus}
}

@Incollection { 2024_matzutt_blockchain-content,
   title = {Illicit Blockchain Content – Its Different Shapes, Consequences, and Remedies},
   year = {2024},
   month = {3},
   day = {7},
   volume = {105},
   pages = {301-336},
   abstract = {Augmenting public blockchains with arbitrary, nonfinancial content fuels novel applications that facilitate the interactions between mutually distrusting parties. However, new risks emerge at the same time when illegal content is added. This chapter thus provides a holistic overview of the risks of content insertion as well as proposed countermeasures. We first establish a simple framework for how content is added to the blockchain and subsequently distributed across the blockchain’s underlying peer-to-peer network. We then discuss technical as well as legal implications of this form of content distribution and give a systematic overview of basic methods and high-level services for inserting arbitrary blockchain content. Afterward, we assess to which extent these methods and services have been used in the past on the blockchains of Bitcoin Core, Bitcoin Cash, and Bitcoin SV, respectively. Based on this assessment of the current state of (unwanted) blockchain content, we discuss (a) countermeasures to mitigate its insertion, (b) how pruning blockchains relates to this issue, and (c) how strategically weakening the otherwise desired immutability of a blockchain allows for redacting objectionable content. We conclude this chapter by identifying future research directions in the domain of blockchain content insertion.},
   keywords = {Blockchain content insertion; Illicit content; Pruning; Redaction},
   publisher = {Springer},
   series = {Advances in Information Security},
   chapter = {10},
   booktitle = {Blockchains – A Handbook on Fundamentals, Platforms and Applications},
   ISBN = {978-3-031-32145-0},
   DOI = {10.1007/978-3-031-32146-7_10},
   reviewed = {1},
   author = {Matzutt, Roman and Henze, Martin and M{\"u}llmann, Dirk and Wehrle, Klaus}
}

@Article { 2024_pennekamp_supply-chain-survey,
   title = {An Interdisciplinary Survey on Information Flows in Supply Chains},
   journal = {ACM Computing Surveys},
   year = {2024},
   month = {2},
   day = {1},
   volume = {56},
   number = {2},
   abstract = {Supply chains form the backbone of modern economies and therefore require reliable information flows. In practice, however, supply chains face severe technical challenges, especially regarding security and privacy. In this work, we consolidate studies from supply chain management, information systems, and computer science from 2010--2021 in an interdisciplinary meta-survey to make this topic holistically accessible to interdisciplinary research. In particular, we identify a significant potential for computer scientists to remedy technical challenges and improve the robustness of information flows. We subsequently present a concise information flow-focused taxonomy for supply chains before discussing future research directions to provide possible entry points.},
   keywords = {information flows; data communication; supply chain management; data security; data sharing; systematic literature review},
   tags = {internet-of-production},
   url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2024/2024-pennekamp-supply-chain-survey.pdf},
   publisher = {ACM},
   ISSN = {0360-0300},
   DOI = {10.1145/3606693},
   reviewed = {1},
   author = {Pennekamp, Jan and Matzutt, Roman and Klinkm{\"u}ller, Christopher and Bader, Lennart and Serror, Martin and Wagner, Eric and Malik, Sidra and Spi{\ss}, Maria and Rahn, Jessica and G{\"u}rpinar, Tan and Vlad, Eduard and Leemans, Sander J. J. and Kanhere, Salil S. and Stich, Volker and Wehrle, Klaus}
}

@Article { 2024_pennekamp_supply-chain-sensing,
   title = {Securing Sensing in Supply Chains: Opportunities, Building Blocks, and Designs},
   journal = {IEEE Access},
   year = {2024},
   month = {1},
   day = {8},
   volume = {12},
   pages = {9350-9368},
   abstract = {Supply chains increasingly develop toward complex networks, both technically in terms of devices and connectivity, and also anthropogenic with a growing number of actors. The lack of mutual trust in such networks results in challenges that are exacerbated by stringent requirements for shipping conditions or quality, and where actors may attempt to reduce costs or cover up incidents. In this paper, we develop and comprehensively study four scenarios that eventually lead to end-to-end-secured sensing in complex IoT-based supply chains with many mutually distrusting actors, while highlighting relevant pitfalls and challenges—details that are still missing in related work. Our designs ensure that sensed data is securely transmitted and stored, and can be verified by all parties. To prove practical feasibility, we evaluate the most elaborate design with regard to performance, cost, deployment, and also trust implications on the basis of prevalent (mis)use cases. Our work enables a notion of secure end-to-end sensing with minimal trust across the system stack, even for complex and opaque supply chain networks.},
   keywords = {blockchain technology; reliability; security; trust management; trusted computing; trusted execution environments},
   tags = {internet-of-production},
   url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2024/2024-pennekamp-secure-sensing.pdf},
   ISSN = {2169-3536},
   DOI = {10.1109/ACCESS.2024.3350778},
   reviewed = {1},
   author = {Pennekamp, Jan and Alder, Fritz and Bader, Lennart and Scopelliti, Gianluca and Wehrle, Klaus and M{\"u}hlberg, Jan Tobias}
}

@Inproceedings { 2024-dahlmanns-fps,
   title = {Collectively Enhancing IoT Security: A Privacy-Aware Crowd-Sourcing Approach},
   year = {2024},
   volume = {14551},
   abstract = {Security configurations remain challenging for trained administrators. Nowadays, due to the advent of the Internet of Things (IoT), untrained users operate numerous and heterogeneous Internet-facing services in manifold use case-specific scenarios. In this work, we close the growing gap between the complexity of IoT security configuration and the expertise of the affected users. To this end, we propose ColPSA, a platform for collective and privacy-aware security advice that allows users to optimize their configuration by exchanging information about what security can be realized given their IoT deployment and scenario.},
   editor = {Mohamed Mosbah, Florence S{\`e}des, Nadia Tawbi, Toufik Ahmed, Nora Boulahia-Cuppens, Joaquin Garcia-Alfaro},
   publisher = {Springer Cham},
   series = {Lecture Notes in Computer Science},
   booktitle = {Proceedings of the 16th International Symposium on Foundations and Practice of Security (FPS '23), December 11-13, 2023, Bordeaux, France},
   event_place = {Bordeaux, France},
   event_name = {International Symposium on Foundations and Practice of Security 2023 (FPS 23)},
   event_date = {December 11-13, 2023},
   state = {unpublished},
   DOI = {10.1007/978-3-031-57540-2_2},
   reviewed = {1},
   author = {Dahlmanns, Markus and Matzutt, Roman and Dax, Chris and Wehrle, Klaus}
}