无证书的多代理签密方案  

Certificateless multi-proxy signcryption scheme

作　　者：俞惠芳[1] 王彩芬[2] 王之仓[1] 叶成绪[1] 

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

出　　处：《计算机工程与设计》2010年第5期973-975,共3页Computer Engineering and Design

基　　金：教育部科学技术研究重点基金项目(208148);青海省教育厅基金项目(2008-Z-60);甘肃省科技攻关基金项目(2GS064-AS2-035-03)

摘　　要：将无证书签名和签密的概念引入到多代理签名中,构造了一种新的无证书的多代理签密方案。在该方案中,原始签密人授权给一个代理签密组,代理签密组中的所有成员合作代替原始签密人生成多代理签密,避免了私钥生成中心(PKG)伪造任意用户,不需要使用任何公钥证书。整个通信不需要安全信道,从而降低了通信代价。与已有方案比,该方案算法复杂性低、通信效率高,更适合于在实际中应用。By applying the concepts of certificateless signature and signcryption to multi-proxy signature, a new certificateless multiproxy signcryption scheme is proposed. In the new scheme, the original signcrypter can delegate the proxy signcrypter group, then the multi-proxy signcryption is generated by the cooperation of all the proxy signcrypters on behalf of the original signcrypter, avoiding the private key generator to personate any user, no certificate is required to verify the authenticity of public key, the system doesn＇t need a security channel, then the communication cost of the system is decreased. The proposed has lower computation complexity and higher communication efficiency than the existing schemes, so it is more convenient for applications in practice.

关 键 词：无证书签名 多代理签密 签密 多代理签名 双线性DIFFIE-HELLMAN问题 椭圆曲线离散对数问题 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]