摘要
盲签名是指签名人不知道所签消息的具体内容。代理签名是指原始签名人将签名权力委托给代理签名人,由代理签名人代表原始签名人对消息进行签名。结合了两者优点的代理盲签名是密码学领域的热点。文章将前向安全的概念引入到代理盲签名体制,提出了一个前向安全的代理盲签名方案。新方案能实现即使代理签名人的代理盲签名密钥被泄露,密钥泄露前所产生的代理盲签名依然有效。另外,通过引入时效参数,新方案可以对代理盲签名的有效时间进行控制。
Proxy signature allows an original signer to trust his/her signing power to a proxy signer so that the proxy signer could sign messages on behalf of the original signer. Blind signature allows a user to have a given message signed by the signer without revealing any information about the message. The proxy blind signature scheme, which satisfies the security properties of both the blind signature scheme and the proxy signature scheme, has become the focus in the field of cryptography. This paper proposes a forward secure proxy blind signature scheme combining the concept of forward security with proxy blind signature. This means that even if an adversary has got the current proxy blind signers＇ key, it is impossible to forge proxy blind signature pertaining to the past, and the previously-generated proxy blind signatures remain valid. Furthermore, the scheme could control the proxy signature time of the proxy blind singer
出处
《通信技术》
2009年第5期193-196,共4页
Communications Technology
基金
国家自然科学基金资助项目(50677058)
国家科技支撑计划项目(2006BAJ05A01
2008BAK49B02)
长沙理工大学资助项目。
关键词
前向安全
代理签名
盲签名
代理盲签名
安全分析
forward security
proxy signature
blind signature
proxy blind signature
security analysis
