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结合盲签名的设计思想,邓等人最近对一般的代理重签名方案进行了扩展,并提出了一种新的签名体制类型:盲代理重签名体制.本文对邓等人最近提出的基于标准模型的盲代理重签名方案进行了安全性分析,指出该方案是不安全的,存在严重的安全缺陷,即原始签名人能在任意选择的消息上伪造委托人的签名.为了克服这个缺陷,提出一个新的盲代理重签名方案,并对改进方案的正确性和安全性进行了分析.
Combined with the design idea of blind signature, Deng et al. Recently extended the general proxy re-signature scheme and proposed a new type of signature system: the blind proxy re-signature system.In this paper, based on the recent standard proposed by Deng et al. The blind proxy re-signature scheme is analyzed in terms of security, pointing out that the scheme is insecure, and there is a serious security flaw, that is, the original signer can forge the signature of the principal on any choice message.In order to overcome this flaw, New blind agent re-signature scheme, and analyzed the correctness and safety of the improved scheme.