椭圆曲线上的多级代理签名方案

Multi-level Proxy Signature Scheme Based on ECC

在已知的各种代理签名方案中,原始签名人和代理签名人只能进行一级代理。但在有些情形下,签名权利需要逐级向下代理,而已知的方案不能满足这种需要。本文基于椭圆曲线提出了一种多级代理签名方案。在该方案中,原始签名人不仅可授权1级代理签名人对消息进行签名,而且1级代理签名人可在许可范围内继续逐级授权。新方案具有实现简单且安全性高等特点,而且也是迄今为止第一类多级代理签名方案。另外,该文还在上述方案的基础上,提出了多级多代理多签名方案。它的适用范围更加广泛,已知的一些代理签名方案可看作它的特例。同时,它也满足有效性、不可否认性、安全性等性质。

An original signer may authorize a proxy signer who can sign a message on behalf of the original signer in the known schemes while the proxy signer can＇t continue to authorize the others.In some cases,the proxy signer needs to do it.So a multi-level proxy signature scheme based on ECC is proposed.In this scheme,the first-level proxy signer not only can be authorized by the original signer but also can continue to authorize others under the agreement.The new scheme can simply carry out and has more security.It＇s the first kind of multi-level proxy signature scheme so far. Furthermore,on the base of the above scheme,a multi-level multi-proxy multi-signautre scheme is proposed.It can be used in more fields and some known proxy signature schemes can be regarded as the cases of it.h also has the properties of efficiency,non-repudiation and security.