摘要： 分析了电子商务、电子政务代理授权方案及网络通信中的代理签名协议，针对现有代理签名方案存在秘密信息泄漏、签名伪造等安全漏洞及协议过程复杂、签名认证运算开销大等不足之处，并基于超椭圆曲线密码提出一类混合代理签名方案，对方案的安全性与执行效率进行了分析。方案中协议与算法安全、简洁、高效，降低了软硬件实现的系统开销，可广泛应用于计算机与无线通信等网络环境。

关键词: 代理授权, 超椭圆曲线密码, 混合代理签名, 概率加密

Abstract: Analysis are made on the proxy authorization schemes and proxy signature schemes in electronic business, as to the security threats of present proxy signature schemes, this paper presents a hybrid proxy signature scheme based on hyper-elliptic curves cryptosystem that can gain a wide application in computer and wireless communication network. The probabilistic encryption algorithm in the scheme avoids the relevance between different signatures generated by the same party. The independence of signature security on the hypothesis of an absolutely trustable signing member in the scheme prevents coalition attack and generalized signature forgery. Detailed analysis also justify its brevity, security, high efficiency, and thus considerable improvement on system overheads regarding software and hardware application.

Key words: proxy authorization, hyper-elliptic curves cryptosystem, hybrid proxy signature, probabilistic encryption

中图分类号: 

• TP393.08