可证安全的无证书群签名方案  

Provably security certificateless group signature scheme

作　　者：陈虎[1] 宋如顺[1] 施峰[1] 

机构地区：[1]南京师范大学数学与计算机科学学院,南京210097

出　　处：《计算机工程与应用》2009年第19期87-91,136,共6页Computer Engineering and Applications

基　　金：江苏省自然科学基金(No.2003101SBRB231);211工程项目(No.181070H901)~~

摘　　要：提出一个安全有效的无证书群签名方案。该方案满足群签名的各种安全性要求,还允许用户动态地加入与离开且不需更新群公钥和其他群成员的签名私钥。群签名的长度不依赖于群成员的数目。它的安全性建立在计算Differ-Hellman问题的困难性之上。This paper proposes secure and efficiency group signature scheme from cryptography.h not only enjoys all the security requirements of a group signature,but also is that allows users to join or leave the group freely without updating the group public key signing key.At the same time,the length of the signature is independent of the numbers of bilinear pairings a dynamic group in certificateless signature scheme and other group members＇ private the group members.The security of our scheme is based on the fact that computational Differ-Hellman problem is hard.

关 键 词：群签名 无证书密码体制 双线性映射 随机预言器 计算Differ-Hellman问题 

分 类 号：TN918[电子电信—通信与信息系统]