一种改进的指定证实人数字签名算法

Study of consigned designated confirmer digital signature based on elliptic curve

通过对指定证实人签名方案的分析,指出了方案中存在的缺陷.提出了委托型指定证实人签名方案,并给出了新的算法.补充了身份认证委托证明人机制,实现了个人隐私的保护.通过对委托人、指定证实人的权限进行管理,实现了与普通数字签名的相互转换,解决了算法的安全性及通用性问题.

The signature scheme based on designated confirmer was analyzed and the pitfalls on the generalization and security factors were pointed out. A signature scheme of authorized designated confirmer was established for the first time and the improved algorithm was proposed. The authen- ticated identifying consigner based mechanism was advanced. The protection for personal privacy was also established. At the same time, the conversion to common digital signature could be realized. The right assigned to the consigner or designated confirmer could be recalled as an optional scheme for the security and commonality problem.