一种动态安全的多重密钥门限共享方案  

Proactive secure multisecret sharing threshold scheme

作　　者：张燕燕[1] 

机构地区：[1]山东政法学院信息科学与技术系,济南250014

出　　处：《计算机工程与应用》2007年第34期156-158,179,共4页Computer Engineering and Applications

基　　金：国家重点基础研究发展规划(973)(the National Grand Fundamental Research 973 Program of China under Grant No.G1999035802);国家高技术研究发展计划(863)(the National High-Tech Research and Development Plan of China under Grant No.2001AA141120) 。

摘　　要：给出了一种动态安全的多重密钥门限共享方案,在该方案中成员可以安全有效地共享多个密钥,具有动态安全性,能够在不改变共享秘密的前提下,周期性更新成员的子密钥,攻击者需要在更新周期内完成攻击过程,任意t个授权成员联合在任意时刻都可以恢复共享密钥,采用可验证的秘密共享方法能够有效地抵御管理者欺骗和成员欺骗,最后证明了方案的正确性和机密性。This paper presents a new proactive secure multisecret sharing threshold scheme.In the scheme,participants can share multiple secrets and compute sub-secret for rebuilding efficiently and securely,and sub-secret hold by participant is verifiable. The scheme use verifiable secret sharing technique to against cheating by dealer and cheating by participants.The scheme is proactive secure,participants will update the sub-secret periodically without dealer intervention,old sub-secret will be obsolete and adversary can＇t get any useful information from these.At the end,it is demonstrated that the scheme is security and efficient.

关 键 词：动态安全 多重密钥共享 离散对数问题 门限方案 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]