This article introduces a deniable ring signature scheme within the framework of a ring signature protocol, which allows a member of the ring to assert or deny their role as the signature's originator without the involvement of a trusted third party. Deniable ring signatures find applications in various scenarios where balancing privacy protection with supervised oversight is crucial. In this work, we present a novel deniable ring signature scheme based on the ISRSAC digital signature, tailored for environments with regulatory requirements, empowering regulators to hold malicious signers accountable. We formally validate the scheme's correctness, unforgeability, anonymity, traceability, and non-frameability through rigorous proofs. Additionally, we conduct a comparative analysis of the communication and computational overheads associated with our proposed scheme, demonstrating its superiority in practical scenarios such as electronic auctions and anonymous reporting mechanisms.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11648128 | PMC |
http://dx.doi.org/10.7717/peerj-cs.2190 | DOI Listing |
PeerJ Comput Sci
July 2024
Department of Cryptology Science and Technology, Beijing Electronic Science & Technology Institute, Beijing, China.
Entropy (Basel)
July 2021
College of Computer and Communication Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China.
Deniable ring signature can be regarded as group signature without group manager, in which a singer is capable of singing a message anonymously, but, if necessary, each ring member is allowed to confirm or disavowal its involvement in the signature via an interactive mechanism between the ring member and the verifier. This attractive feature makes the deniable ring signature find many applications in the real world. In this work, we propose an efficient scheme with signature size logarithmic to the cardinality of the ring.
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