利用双线性对构建基于身份的指定验证者签名方案

在一般的数字签名中,任何拥有签名者公钥的人,都可以验证该签名的有效性.但这种性质,在签名者想要保护其隐私性的情况下,是该签名者所不期望的.指定验证者签名概念的提出,能很好解决这种情况下的问题,而基于身份技术的使用,又能对公钥授权机构的密钥分发问题加以很好的解决.利用双线性对可实现密码学上基于身份的签名应用.就基于身份的指定验证者签名方案进行研究,利用双线性知识,参照前人的指定验证者签名方案,在系统设置阶段增加一个单向的无碰撞Hash函数,在签名阶段选取一个参数,在签名和验证阶段应用系统初设阶段所定义的Hash函数构造本方案.并对方案在可验证性、安全性及性能做了相应分析.

A New Identity-based Designated Verifier Signature Scheme Using Bilinear Pairings

In general, a digital signature, any owner of the signature＇s public key can verify the validity of the signature. But this nature, in the ease of the signer wants to protect their privacy, is undesirable for the person who sign this signature. The concept of Designated Verifier Signature can solve this case. On the public authority for the key distribution problem, the identity-based technologies, also to be a good solution. Using the bilinear identity-based cryptography can be achieved the application of signature. In this paper we base identity-based cryptography scheme and using the bilinear knowledge, referring to previous designated verifier signature scheme proposed this program. In the system sets stage add an one-way collision Hash function,select a parameter in the signature stage, and in signing and validation phase app!y this set. And in the end we analyze this programs in verifiability, security and performance.