高效的具有指定验证者的签名方案

Efficient signature scheme for specified verifier

在许多实际应用(如电子选举、电子商务、软件的许可认证)中,任何人都可以验证签名有效性的要求是没有必要的,也是签名者不希望的。研究了司光东等人的短签名方案,发现他们的方案在应用于其他网络环境时容易遭受重放攻击。在原方案基础上,提出了一个高效的应用范围更广的方案,该方案具有指定验证者的性质,并在随机预言机模型和CDH问题困难假设下证明了该方案的安全性。

It＇ s not indispensable that anyone can verify the validity of a signature in some practical applications, such as, e-commerce and software licensing, and it ＇ s not desired of the signer. Studied Si Guang-dong et al. short signature scheme, discovered that their scheme easy to suffer the replay attack when applied in other network environment. Based on the original scheme, proposed a highly efficitive scheme with more widespread application. It possessed specified verifier property. Mean- while, proved its security in the random oracle model under the hardness assumption of CDH problem.