匿名代理的理想实现

An Ideal Proxy Signature Scheme with Proxy Signer Privacy Protection

通过将限制性盲签名技术以及知识的零知识证明等工具引入代理签名 ,构造出在合理安全性假设下可证安全的新匿名代理协议 其特点在于 :①通过限制性盲签名来确保代理签名中包含关于代理签名人身份信息的ElGamal密文 ,以保证在发生争议时可以有效地揭露代理签名人的身份 ;②利用知识的零知识证明确保只有合法的代理签名人才能完成代理签名 同时还证明了其满足可验证性、强不可伪造性、强不可否认性等其他安全性要求 。

By using restrictive blind signature and zero knowledge proofs of knowledge, a new proxy signature scheme with proxy signer privacy protection is proposed, which has two characteristics listed as follows: (1)Being encrypted by ElGamal encryption, the ID information of the proxy signer is included in the proxy signature, so no one, except the revoker, can find the identity of the proxy signer, while with the help of the revoker, the identity of the proxy signer can be revealed; (2)By using the zero knowledge proofs of knowledge, only the legitimate proxy signer can give a proxy signature on behalf of the original signer Meanwhile, since the security of the proposed scheme is based on the restrictive blind signature hypothesis and the random oracle model, the revoker can not make a cheat and only when the proxy signer follows the scheme, he can get the power of attorney At the same time, it is proved that it satisfies the security requirements such as verifiability, strong unforgeability, strong non repudiation, proxy privacy, and privacy revocation