改进的带签名者意向的结构化多重签名方案  

Improvement of structured multi-signature scheme with signers' intentions

作　　者：王泽成[1] 斯桃枝[2] 李志斌[1] 

机构地区：[1]华东师范大学信息科学技术学院 [2]上海第二工业大学计算机与信息学院,上海201209

出　　处：《计算机应用》2008年第1期71-73,共3页journal of Computer Applications

基　　金：国家自然科学基金资助项目(60703004);中国高等教育博士点基金资助项目(20060269006);上海市教育委员会科研项目(06RZ019);安徽省教育厅自然科学基金资助资助(KJ2007C301ZC);中华供销合作总社科研项目(GXZSKY06050zc)

摘　　要：分析了一个带签名者意向的结构化多重签名方案所存在的安全性弱点——签名者的意向可以被外部或内部的攻击者篡改。通过使用更安全的算法对签名者的意向进行签名避免了这一弱点。改进后的方案除具有所有必需的安全性质外,在效率方面也有所改进:多重签名长度更短,通信效率和签名算法效率更高。新方案的不足之处是验证算法效率有所降低。The security weakness of structured multi-signature scheme with signers＇ intentions was pointed out. It is that the signers＇ intentions could be modified by an inner or outer attacker, thus the security of this type of signature is tampered. By using a more secure signing algorithm to sign the signers＇ intentions, the problem was solved. The improved scheme not only has all the necessary security properties of this type of signature, but also has improvement in efficiency - shorter signature size, more efficient in communication and signing computation. The shortage of the new scheme is some decrease in the efficiency of verification.

关 键 词：数字签名 多重数字签名 结构化多重签名 签名者意向 双线性对 

分 类 号：TP309.2[自动化与计算机技术—计算机系统结构]