A new generic construction of anonymous designated confirmer signature for privacy-preserving fair exchange

作者：Wei Jiannan^*; Yang Guomin; Mu Yi

来源：International Journal of Computer Mathematics, 2017, 94(5): 946-961.

DOI：10.1080/00207160.2016.1154951

• Identity-based cryptography
• designated confirmer signature
• anonymous signature
• undeniable signature
• fair exchange

Designated confirmer signature (DCS), introduced by Chaum at Eurocrypt 1994, can be used to control the public verifiability of a digital signature. It is a very useful tool in many applications which require a signature to remain anonymous and unverifiable until a certain time/condition is reached. In this paper, we propose a new generic construction of Anonymous Identity-Based DCS from Anonymous Identity-Based Signature. Interestingly, our construction also automatically implies an Anonymous Identity-Based Convertible Undeniable Signature scheme. We prove that the construction is secure for signer, verifier and confirmer in the standard model.

• 出版日期2017