基于RSA的前向安全的防欺诈的门限数字签名方案  

A THRESHOLD DIGITAL SIGNATURE SCHEME WITH FORWARD-SECURE AND CHEAT-PROOF BASED ON RSA

作　　者：温翔[1] 袁丁[1] 

机构地区：[1]四川师范大学计算机科学学院,四川成都610068

出　　处：《计算机应用与软件》2008年第6期280-282,共3页Computer Applications and Software

基　　金：四川省科技厅科技攻关项目(05GG007-008)

摘　　要：以RSA数字签名方案和前向安全的理论为基础,结合Feldman可验证的秘密共享方案,提出了一种基于RSA的前向安全和防欺诈的门限数字签名方案。该方案中用于数字签名的私有密钥由一个单向函数控制随时间的推移不断更新,而公有密钥保持不变,即使攻击者获得了某个时期的私钥,他也无法伪造该时期之前的签名。该方案在签名过程中溶入了部分签名和防欺骗的秘密共享方案,相比于现有的RSA签名方案,该方案具有更高的安全性。Proposed a forward-secure and cheat-proof threshold digital signature scheme, which based on RSA digital signature scheme and the forward-secure theory, while Feldman＇s verifiable secret sharing （VSS） was employed. In this scheme, the digital signature＇s private key is under the control of a one-way function and continually changes with time going by, but its public key remains the same. Even if an attacker intercepts and captures the private key at a certain time, he/she still can not fake the signature of the time before. The distributive signature and cheat-proof secret sharing scheme are used during the course of the signature in this scheme. Compared with recent RSA digital signature,this scheme has a higher security.

关 键 词：RSA 前向安全 防欺诈 门限 部分签名 

分 类 号：TP309[自动化与计算机技术—计算机系统结构] TN918.1[自动化与计算机技术—计算机科学与技术]