可证安全的基于身份代理聚合签名方案

Provably secure identity-based proxy aggregate signature scheme

对一个基于身份代理聚合签名方案进行了安全性分析,证明该方案的聚合签名不能抵抗伪造攻击。在此基础上,利用双线性技术构造了一个新的基于身份代理聚合签名方案,并且利用Diffie-Hellman困难问题,在随机预言模型下,证明了新方案是存在性不可伪造的.效率分析结果表明,新方案的验证等式需要3个对运算,比已有的代理聚合签名方案更安全更高效。

Through secure analysis of an identity-based proxy aggregate signature scheme, this paper proved the aggregate signature couldn＇t resist forgery attack. Based on the scheme, this paper proposed a new identity-based proxy aggregate signature scheme with the bilinear pairings,and proved the proposed scheme is secure against existential forgery attack under the computational Diffie-Hellman problem in the random oracle model. The new scheme only needs three pairing computation in the verification stage and is more efficient than the known schemes.