摘要： 代理签名是一方将自己签名的能力授权给另一方，是一种很重要的密码协议，目前已知的可证明安全的代理签名还很少。该文利用间隙Diffie-Hellman(GDH)群的特点构造了一个新的代理签名方案，新方案在随机预言模型下是可证明安全的。

关键词: 代理签名, 可证明安全性, GDH群, 随机预言模型

Abstract: The paradigm of proxy signature is a method for an entity to delegate signing capabilities to other participants so that they can sign on behalf of the entity. Proxy signature is an important cryptographic protocol, however, there are only few provable secure proxy signature schemes. In this paper, a new provably secure proxy signature scheme based on Gap Diffie-Hellman (GDH) group is proposed.

Key words: Proxy signature, Provable security, GDH group, Random oracle model

中图分类号: 

• TP393.08