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结合无证书签名和盲签名的特点,提出一个新的无证书盲签名方案,以简化传统公钥密码体制的密钥管理过程,解决基于身份的公钥密码体制存在的密钥托管问题。分析结果表明,该方案在随机预言机模型、q强Diffie-Hellman困难假设和逆计算Diffie-Hellman困难假设下满足盲性、不可追踪性和不可伪造性,且签名的产生和验证过程仅需一个对运算,具有较高的效率。
Combined with the characteristics of certificateless signatures and blind signatures, a new certificateless blind signature scheme is proposed to simplify the key management process of traditional public-key cryptosystem and to solve the key escrow problem of identity-based public-key cryptosystem. The analysis results show that this scheme satisfies the blindness, traceability and unforgeability in the random oracle model, q strong Diffie-Hellman difficult assumption and inverse computational Diffie-Hellman difficult assumption, and the signature generation and verification process need only one On the operation, with higher efficiency.