摘要:针对2011年王勇兵等提出的一个基于身份代理聚合签名方案,给出一个聚合签名的伪造攻击以及代理签名者的否认攻击,证明了该方案存在安全隐患,进而提出改进方案,并对其安全性进行了分析,弥补了原方案的安全缺陷。
Aiming at the ID-hased proxy aggregate signature scheme proposed by Wang et al in 2011 ,we show that Wang' s scheme is unsecure by giving a forgery attack on aggregate signature and a proxy signer' s repudiation attack, and then propose an improved scheme and analyze its security. The improved scheme overcomes the weakness of Wang' s scheme.