Private Multi-Hop Accountability for Supply Chains

IEEE International Conference on Communications workshops, pp. 1–7

Abstract

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.

Authors 8

1. Jan Pennekamp Aachen Communication and Distributed Systems

   RWTH Aachen University

   Affiliation as printed

   Communication and Distributed Systems, RWTH Aachen University, Germany

2. Lennart Bader Aachen Communication and Distributed Systems

   RWTH Aachen University

   Affiliation as printed

   Communication and Distributed Systems, RWTH Aachen University, Germany

3. Roman Matzutt Aachen Communication and Distributed Systems

   RWTH Aachen University

   Affiliation as printed

   Communication and Distributed Systems, RWTH Aachen University, Germany

4. Philipp Niemietz Aachen Laboratory for Machine Tools and Production Engineering (WZL)

   RWTH Aachen University

   Affiliation as printed

   Laboratory for Machine Tools and Production Engineering, RWTH Aachen University, Germany

5. Daniel Trauth Aachen Laboratory for Machine Tools and Production Engineering (WZL)

   RWTH Aachen University

   Affiliation as printed

   Laboratory for Machine Tools and Production Engineering, RWTH Aachen University, Germany

6. Martin Henze

   Fraunhofer Institute for Communication, Information Processing and Ergonomics

   Affiliation as printed

   Cyber Analysis & Defense, Fraunhofer FKIE, Wachtberg, Germany

7. Thomas Bergs Aachen Laboratory for Machine Tools and Production Engineering (WZL)

   RWTH Aachen University

   Affiliation as printed

   Laboratory for Machine Tools and Production Engineering, RWTH Aachen University, Germany

8. Klaus Wehrle Aachen Communication and Distributed Systems

   RWTH Aachen University

   Affiliation as printed

   Communication and Distributed Systems, RWTH Aachen University, Germany