Periodically Deniable Ring Signature Scheme Based on SM2 Digital Signature Algorithm
Periodically deniable ring signature enables ring members to deny their identity selectively as signers within the ring after each time period.This transformation,implemented periodically,established a self-controlled mechanism,enhancing the privacy protection for ring members while also fostering cooperation with regulatory authorities.Traditional digital signatures possess non-repudiation properties,ensuring the integrity and authenticity of the signature's source and content.In contrast,deniable signatures offer repudiation properties,allowing individual members within a circle to confirm or disclaim their association with the signature without relying on a trusted third party.This article presented a periodically deniable ring signature scheme based on SM2,extending the work of BAO Zijian et al.,to advance the use of domestic cryptographic algorithms.The scheme supported periodic confirmation and revocation of signatures,meeting the substantial demand for privacy protection.The formal proof provided demonstrates the scheme's correctness,non-forgeability,anonymity,traceability,and non-repudiation properties.
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