摘要
基于离散对数问题和单向函数的安全性,提出了一个新的安全的代理签名方案。方案引入授权文书和时间证书等概念,克服了代理人滥用权力的缺陷,使代理人只能在特定时间内进行次数一定的代理签名;新设计的算法,有效分离了实际签名权和代理签名权,克服了签名验证者不易理解所收到的签名究竟是某人自己的真实签名还是受人之托的代理签名的缺陷;最后对方案的安全性和算法效率进行了分析。结论表明,新方案是一个安全可行的代理签名方案,具有较好的理论价值和应用价值。
This paper proposed a secure proxy signature scheme based on the security of logarithmic problem and one - way function. The paper has the ability for the original signer to control the power of the proxy digital signature by introduction the concepts of authorization - writ and time - certification. The new designed arithmetic effectively separates the power of proxy signature and the original signature, overcomes the fault that the verifier cant easily distinguish the signature that he received is from the proxy signature or from the original signature. At last, the author analysed the security and the efficiency of the scheme, conclusion shows that it＇s a secure and feasible proxy signature scheme which has theory and application value.
出处
《荆楚理工学院学报》
2009年第5期5-8,共4页
Journal of Jingchu University of Technology
基金
国家自然科学基金资助项目(项目编号:10671056)
关键词
离散对数
单向函数
代理签名
discrete logarithms
one - way function
proxy signature
