Print Email Facebook Twitter Eunomia Title Eunomia: Anonymous and Secure Vehicular Digital Forensics based on Blockchain Author Li, Meng (Hefei University of Technology) Chen, Yifei (Hefei University of Technology) Lal, C. (TU Delft Cyber Security) Conti, M. (University of Padua) Alazab, Mamoun (Charles Darwin University) Hu, Donghui (Hefei University of Technology) Date 2023 Abstract Vehicular Digital Forensics (VDF) is essential to enable liability cognizance of accidents and fight against crimes. Ensuring the authority to timely gather, analyze, and trace data promotes vehicular investigations. However, adversaries crave the identity of the data provider/user, damage the evidence, violate evidence jurisdiction, and leak evidence. Therefore, protecting privacy and evidence accountability while guaranteeing access control and traceability in VDF is no easy task. To address the above-mentioned issues, we propose Eunomia: an anonymous and secure VDF scheme based on blockchain. It preserves privacy with decentralized anonymous credentials without trusted third parties. Vehicular data and evidence are uploaded by data providers to the blockchain and stored in distributed data storage. Each investigation is modeled as a finite state machine with state transitions being executed by smart contracts. Eunomia achieves fine-grained evidence access control via ciphertext-policy attribute-based encryption and Bulletproofs. A user must hold specific attributes and a temporary-and unexpired token/warrant to retrieve data from the blockchain. Finally, a secret key is embedded into data to trace the traitor if any evidence breach happens. We use a formal analysis to demonstrate the strong privacy and security properties of Eunomia. Moreover, we build a prototype in a WiFi-based Ethereum test network to evaluate its performance. Subject Vehicular networksdigital forensicsprivacysecurityblockchain To reference this document use: http://resolver.tudelft.nl/uuid:9dc36cb9-95ca-442e-b803-e61ddc19c3d1 DOI https://doi.org/10.1109/TDSC.2021.3130583 Embargo date 2023-07-16 ISSN 1545-5971 Source IEEE Transactions on Dependable and Secure Computing, 20 (1), 225-241 Bibliographical note Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2023 Meng Li, Yifei Chen, C. Lal, M. Conti, Mamoun Alazab, Donghui Hu Files PDF Eunomia_Anonymous_and_Sec ... kchain.pdf 2.71 MB Close viewer /islandora/object/uuid:9dc36cb9-95ca-442e-b803-e61ddc19c3d1/datastream/OBJ/view