Posterior Security: Anonymity and Message Hiding of Standard Signatures

作者：Tsz Hon Yuen, Ying-Teng Chen, Shimin Pan, Jiangshan Yu, Joseph K. Liu · 年份：2025 · DOI：10.1145/3719027.3744797 · 被引用次数：2 · 研究领域：Cryptography and Data Security、User Authentication and Security Systems、Cryptography and Residue Arithmetic

We introduce posterior security of digital signatures, the additional security features after the original signature is generated. It is motivated by the scenario that some people store their secret keys in secure hardware and can only obtain a standard signature through a standardized interface. In this paper, we consider two different posterior security features: anonymity and message hiding.