基于Hash函数的秘密共享方案安全研究  

Security research of secret sharing schemes based on Hash function

作　　者：闫会娟[1] 林国顺[2] 

机构地区：[1]大连理工大学城市学院管院信息系,辽宁大连116600 [2]大连海事大学管理科学与工程系,辽宁大连116026

出　　处：《计算机工程与设计》2006年第24期4718-4719,4723,共3页Computer Engineering and Design

摘　　要：分析了当前几种秘密共享方案的不足,且给出了一个基于单向Hash函数的动态秘密共享方案的改进算法,它的特性如下:更新系统密钥时,无须更改每个子密钥;当某个子密钥泄密时,不对其它子密钥的安全构成威胁;系统为新共享者分配子密钥时,其它子密钥不受任何影响;子密钥可无限制地多次使用;具有很强的防欺诈和欺诈识别功能。该算法已在计算机上进行模拟,该文将给出一些实验数据,并对算法性能进行分析。The weak points of several secret sharing schemes is analyzed and a better algorithm of dynamic secret sharing scheme based on hash function is proposed. It has the following properties： The system can renew system secrets without renewing the shadows of the participants; When some participants＇ shadows are revealed, they don＇t threaten the others; A new shadow is generated for a new participant without any effect on the others; The shadows are reused for many times; Efficiently guard against cheating among participants. It is simulated on the computer and generated some experiment datum. Finally. the scheme＇s performance is analyzed through the datum.

关 键 词：防欺诈 系统密钥 子密钥 HASH函数 秘密共享 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]