一种前向安全的定向代理签名方案

Forward-secure Designated-receiver Proxy Signature Scheme

基于前向安全性和有限乘法群上离散对数的难解性,提出一种新的代理签名方案。该方案不仅具有前向安全性、不可伪造性、不可否认性、匿名性,而且还具有定向性,只有指定的验证人可以验证代理签名是否有效,并分离实际签名权和代理签名权。分析结果表明,该方案的安全性较高。

Based on forward-security and the difficulty of solving discrete logarithm problems on the finite multiplicative group over the finite fields,a new proxy signature scheme is proposed.The scheme has the following characteristics： forward-security,unforgeability,undeniability,anonymous,etc.Besides the preceding characteristics,only the designated-receiver can validate the proxy signature.The new designed arithmetic successfully separates the power of proxy signature and the original signature.It analyzes the security of the scheme,and conclusion shows that the new designed scheme is more security.