Practical periodic deniable signature scheme based on ISRSAC

In periodic deniable ring signature schemes, ring members have the ability to periodically confirm or deny their role as signers according to a protocol, without the need for third-party intervention—this is referred to as periodic deniable ring signature. Such signature schemes have broad application potential, effectively balancing privacy protection with regulatory controllability. To enhance the practical utility of signature schemes, this paper introduces a digital signature method utilizing ISRSAC that supports periodic deniable ring signatures, which is particularly suitable in environments with stringent regulatory requirements and helps regulatory authorities hold malicious signers accountable. The paper provides thorough formal proofs to validate the correctness, unforgeability, anonymity, traceability, and non-frameability of the proposed scheme. The scheme is suitable for a range of real-world applications, including electronic auctions and anonymous reporting systems, showcasing its robust functionality and practicality. The experimental results show that for 100 ring members, this scheme achieves a signature length of 1.2 KB and a signature generation time of 48 ms, representing reductions of 57% and 81% respectively compared to RSA-based schemes. The storage overhead for deniable evidence has been optimized to 0.8 KB per cycle, significantly enhancing its practicality in blockchain environments.