基于超奇异同源的指定验证者盲签名

Supersingular Isogeny-Based Designated Verifier Blind Signature

超奇异同源密码是一种新型后量子密码,具有密钥、密文或签名长度短等优点。通过对一些已有的基于同源的签名方案的研究与分析,提出了一种基于超奇异同源的指定验证者盲签名方案。该签名方案在Ward等人提出的CSI-Fish的基础上,结合Rajeev等人提出的指定验证者盲签名方案,实现了CSIDH下的指定验证者盲签名。此方案可以不需要额外的信息来计算对偶同源,即可达到脱盲的目的。

As a novel promising post-quantum cryptosystem,the supersingular isogeny based cryptosystem has the advantages of short lengths of key,ciphertext or signature.With the research and analysis of some existing isogeny based signature schemes,a supersingular isogeny-based designated verifier blind signature scheme is proposed in this paper,where the designated verifier blind signature scheme in the case of CSIDH is realized by combing the CSI-Fish scheme proposed by the Ward et al and the designated verifier blind signature scheme proposed by the Rajeev et al.In the proposed scheme,blindness could be avoided without requiring additional information for calculating the dual isogeny.