无证书部分盲签名方案

Certificateless Partially Blind Signature Scheme

无证书公钥密码学是由Al-Riyami和Patenson在2003年的亚洲密码学会议上新提出来的密码学原型,它克服了基于身份公钥密码系统的密钥托管问题和基于证书公钥密码系统的证书管理问题.部分盲签名是一种特殊的数字签名,在部分盲签名中,签名者不知道其所签消息的内容,但可以嵌入一个公共信息.本文提出一个无证书的部分盲签名方案,该签名方案是利用双线性对来构造的,其安全性基于计算性Diffie-Hellman困难问题.

Certificateless Public Key Cryptography as a new cryptographic paradigm was firstly introduced by AI-Riyami and Paterson in Asiacrypt 2003, which avoids the inherent key escrow problem of identity-based cryptography and does not require certificates to guarantee the authenticity of public keys as in the public key infrastructure. Partially blind signature is a variant of digital signatures, which allows the user to get a signature without giving the signer any information about the actual message and the resulting signature. Based on the Computational Diffie-Hellman Assumption, in this paper, we propose a certificateless partially blind signature scheme.