利用身份和双线性对的多重签密方案  

Multi-signcryption scheme using identity and bilinear pairing

作　　者：张串绒[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

出　　处：《西安电子科技大学学报》2007年第2期270-273,共4页Journal of Xidian University

基　　金：国家自然科学基金资助(J60404290135);973计划项目基金(G1999035800)

摘　　要：基于身份和椭圆曲线上双线性对,提出了一种新的多重签密方案.该方案以用户的身份信息,如电子邮箱地址,IP地址、电话号码等作为用户公钥,从而降低了建立和管理公钥基础设施的代价,避免了用户对公钥及其证书的存储和传递等问题;利用椭圆曲线上双线性对,使方案能以短的密钥和小的计算量实现与已有多重签密方案同等的安全强度.在方案中,原始签密者用自己的私钥解密多重签密,并对签密消息和签密次序的有效性进行验证,高效实现了多重签密的密码功能.Based on identity and bilinear pairing on the Elliptic Curve, a new multi-signcryption scheme is proposed. In this scheme, the user＇s public key is his identity information, such as e-mail address, IP address, telephone number etc. This greatly decreases the cost of building and managing public key infrastructures; the expense of the users＇ management of public-key and their certificates is avoided. By using bilinear pairing on the elliptic curve, this scheme can reach the equivalent security levels of the existing multi-signcryption schemes with a short length key and a small computational cost. Moreover, in this scheme, the original signcrypter using his private key decrypts the multi-signcrypted messages and verifies the validity of signcrypted messages and the order of multi-signcryption. Therefore, our multi- signcryption scheme based on identity and bilinear pairing efficiently achieves the cryptographic functions of multi-signcryption.

关 键 词：多重签密 基于身份的密码系统 双线性对 

分 类 号：TN918.1[电子电信—通信与信息系统]