Abstract: As one of the kernel techniques in information security，the digital signature plays an important role in electronic commerce and electronic government affair.The proxy signature，an important branch of the digital signature，has been widely studied and utilized.A proxy signature scheme is proposed based on bilinear paring which is an available tool in constructing cryptographic protocols.By using this scheme，the security and the speed of digital signature can be greatly improved.

Key words: bilinear paring, proxy signature, digital signature

摘要： 作为信息安全的核心技术之一的数字签名在电子商务和电子政务中起着重要的作用。代理签名作为数字签名中一种重要的分支被广泛地研究和应用。双线性对是近几年发展起来的构造密码体制的一个重要工具，因此一种基于双线性对的代理签名方案被提出来。这种方案极大地提高了数字签名的安全性以及实现速度。

关键词: 双线性对, 代理签名, 数字签名