基于身份的无可信中心的环签密方案  

ID-based ring signcryption scheme without trusted party

作　　者：程文华[1] 王彩芬[1] 乔小妮[1] 韩亚宁[1] 张玉磊[1] 

机构地区：[1]西北师范大学数学与信息科学学院,兰州730070

出　　处：《计算机工程与应用》2009年第27期119-122,共4页Computer Engineering and Applications

基　　金：教育部科学技术研究重点项目No.208148;甘肃省教育厅重点项目(No.0801-01)~~

摘　　要：环签密不仅实现了消息的保密性和认证性,而且实现了签密者的完全匿名性。给出了基于身份的无可信中心的环签密的方案模型和安全定义,提出和证明了一种有效的基于身份的无可信中心的环签密方案,与已有的方案比较,不需要可信的PKG,解决了基于身份密码体制中的密钥托管问题,提高了效率。该方案满足匿名性、保密性、不可伪造性、身份验证、可追踪性。Ring signcryption realizes the confidentiality and authenticity of message at the same time,and realizes full anonymity of the signcrypter.The model and the notion of security of ID-based ring signcryption scheme without trusted party are given,and an ID-based ring signcryption scheme without trusted party is proposed.Compared with the original programs,trusted PKG is not needed and the problem of key escrow in the ID-based public key cryptography is eliminated in this scheme.Efficiency of the scheme is improved.Proposed scheme has the following properties：Signcrypter anonymity,indistinguishability,unforgeability,identity verifiablity and trace.

关 键 词：基于身份 密钥生成中心 身份验证 环签密 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]