摘要
代理签名使得原始签名人可以授权代理人代理其签名,不可否认签名则使得只有签名人才能向第三方证实或否认签名的有效性。将代理签名与不可否认签名组合到一起,提出代理不可否认签名的概念,给出一个代理不可否认签名方案。该方案在决策Diffie-Hellman困难性假设下可证明是安全的。
Proxy signatures allow an original signer to entrust a proxy signer to sign messages on behalf of him. Undeniable signatures ensure that only the signer can confirm or deny the validity of a given signature to the third party. For the need of some practical applications, the proxy signature and the undeniable signature were combined together, and a new concept of proxy undeniable signature was proposed, The proxy undeniable signature scheme＇s security could be proved under the decisional Diffie-Hellman assumption.
出处
《计算机应用》
CSCD
北大核心
2006年第11期2592-2595,共4页
journal of Computer Applications
基金
福建省青年科技人才创新项目(2005J055)
信息安全国家重点实验室开放课题
福建省教育厅科技计划项目(JA04250)
关键词
数字签名
代理签名
不可否认签名
digital signature
proxy signature
undeniable signature
