一种向前安全的门限代理签名方案

向前安全的签名方案其特点是减少私钥被揭露后潜在的安全问题。到目前为止,将向前安全用于代理签名设计一种安全的向前安全代理签名以及门限代理签名方案仍是一个尚未很好解决的问题。文章针对由M.Y.Chen于2005年提出的向前安全代理签名方案中的缺陷进行了改进,并基于改进后的方案提出了一种向前安全的门限代理签名方案,除满足基本门限代理安全要求外,密钥产生无需通过KDC,代理签名产生不需要通过由原始签名者指定的指派人等优点。

New Forward Secure Threshold Proxy Signature Scheme

The property of forward-security can be used to reduce the potential damages caused by key exposure.So far,the problem of how to design an effective forward-secure proxy signature scheme and a forward-secure threshold proxy is also an open problem.In this paper,we first improve the signature scheme proposed by M.Y.Chen in 2005,and then we present a forward-secure threshold proxy signature scheme based on our improved scheme.Besides satisfying the basic requirement of the threshold proxy signature,it doesn't need KDC during the generation of signing keys and the other people delegated by the original signer to generate the proxy key.