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针对适用于移动通信的代理保护代理签名方案和代理聚合签名方案存在的不满足强不可伪造性和强不可否认性的安全缺陷,提出了2个改进的代理签名方案,当代理私钥生成时,添加一个随机数,使得原始签名者不能够假冒代理签名者进行伪造攻击.安全性分析与证明表明:改进方案满足代理签名的基本安全性质,在随机预言机下是可证明安全的;同时,在适应性选择消息攻击下,其代理生成协议是安全的.
Aiming at the shortcomings of strong unforgeability and strong non-repudiation security in proxy protection proxy signature schemes and proxy polymerization signature schemes applicable to mobile communications, two improved proxy signature schemes are proposed. When the proxy private proxy keys are generated, Add a random number, so that the original signer can not fake the proxy signer forgery attacks.Security analysis and proof: the improved scheme to meet the basic security signature of the proxy signature, in the random oracle machine is provable security; the same time, in the Under the attack of adaptive choice message, the proxy generates protocol is safe.