无可信中心的秘密共享-多重签名方案  

Secret Sharing-Multisignature Scheme Without a Trusted Center

作　　者：卢明欣[1] 傅晓彤[1] 张宁[1] 肖国镇[1] 

机构地区：[1]西安电子科技大学综合业务网理论及关键技术国家重点实验室,陕西西安710071

出　　处：《华南理工大学学报（自然科学版）》2007年第1期99-101,105,共4页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金重大研究计划项目(90104005)

摘　　要：为满足多等级数字签名的需要,采用联合随机秘密共享技术和多重签名技术,设计了一种新的签名方案——无可信中心的秘密共享-多重签名方案.在该方案中,没有可信中心,每个参与者随机选取自己的私钥,并公布相应的公钥作为群体公钥的一部分.针对不同重要等级的消息,满足规定数量的参与者联合起来,就能生成有效的多重签名,而不需要更换成员的私钥和公钥.分析表明,和已有的方案相比,该方案降低了密钥分发的代价,提高了系统的性能.In order to meet the requirements of digital signature for messages with different importance, a secret sharing-multisignature scheme without a trusted center is proposed based on the techniques of joint random secret sharing and multisignature. In this scheme, there is no trusted center, and each participant randomly selects his own secret key and publishes the corresponding public key as a part of the group public key. For messages with different importance, participants of prescriptive amount can cooperate to produce ging their private and public keys. As compared with the existing schemes, the key distribution and improves the system performance. valid muhisignatures without chanproposed scheme lowers the cost of

关 键 词：数字签名 秘密共享 联合随机秘密共享 多重签名 可信中心 

分 类 号：TN918.1[电子电信—通信与信息系统]