摘要： 目前，移动代理在不可信环境中存在一个重要缺陷，即不能识别交易的有效性。文章提出了一个安全的未指定代理者的代理签名方案，它解决移动代理在不可信环境中的安全交易问题，新方案对客户和商家双方都具有身份的不可伪造性、不可否认性和交易信息的完整性等特点，实现了客户和商家之间公平交易。描述了新方案，给出了实际实现及应用，并对其安全性进行了分析。

关键词: 代理签名, 移动代理, 安全交易

Abstract: A major problem of mobile agents is apparent inability to authenticate transactions in hostile environments. A secure non-designated proxy signature scheme, which resolves issues for secure transactions with mobile agents in hostile environment is presented. The new scheme achieved following characteristics: the identity of a customer and a shop can’t be forged and not be disavoid, and the integrality of transaction information can’t be tampered, etc. The new scheme can perform fair transactions between a customer and a shop. The new scheme and its implementation are presented. The security of the scheme is discussed.

Key words: Proxy signature, Mobile agent, Secure transaction

中图分类号: 

• TN918