基于自认证的多接收者签密方案  

Multi-recipient signcryption scheme based on self-certified cryptography

作　　者：王彩芬[1] 俞惠芳[1] 王之仓[2] 程文华[1] 

机构地区：[1]西北师范大学数学与信息科学学院,甘肃兰州730070 [2]青海师范大学计算机科学系,青海西宁810008

出　　处：《西北师范大学学报（自然科学版）》2009年第3期42-44,共3页Journal of Northwest Normal University(Natural Science)

基　　金：教育部科学技术研究重点项目(208148);青海省科技厅软课题项目(2008-Z-620)

摘　　要：基于多接收者签密和自认证密码系统理论,使用双线性对提出了一个基于自认证的多接收者签密方案,并在ECDL问题和BDH问题的难解性下证明了其安全性.所提方案在验证公钥真实性时,不需要额外的证书;可信机构不知道用户的私钥.与已有方案相比,该方案具有计算效率高、通信成本低等优点,更适合于在实际中应用.Based on the theory of multi-recipient signcryption and self-certificated cryptography, a new multi-recipient signcryption scheme based on self-certified cryptography is proposed from pairings, and its security is proved under the hardness of elliptic curve discrete logarithm problem and bilinear DiffieHellman problem. In the scheme, no certificate is required for validating the public key; certificate authority does not know the private keys of the users. The new scheme is more efficient than the existing ones in terms of computation costs and communication overheads, so it is more propitious to applications in practice.

关 键 词：自认证密码系统 多接收者签密 双线性对 

分 类 号：TN918.1[电子电信—通信与信息系统]