一个新的代理签名方案的设计

在Shum和V ictor研究的基础上,提出了一个保护代理签名者隐私的强代理签名新方案,这个方案不要求在原始签名人和代理签名人之间保持一个安全的信道,任何一个恶意的攻击者都不可以通过截取代理授权信息来伪造代理签名者的签名.并且这个方案能够满足强不可伪造性和强不可否认性.

A New Proxy Signature Scheme

Shum and Victor proposed a strong proxy signature scheme with proxy signer privacy protection,but a secure channel must kept between the original signer and the proxy signer.Otherwise,an adversary who intercepts the delegation can generate a proxy signature as P does.We also point out that the scheme presented by Shum and Victor cannot provide strong non-repudiation and strong unforgeability.Finally we present our new proxy signature schemes which overcome the weakness mentioned above and a secure channel is not needed between the original signer and the proxy signer.