无需配对的无证书门限签名方案  

A Threshold Signature Scheme Based on CL-PKC without Paring

作　　者：杨邓奇[1] 杨健[1] 

机构地区：[1]大理学院数学与计算机学院,云南大理671003

出　　处：《大理学院学报（综合版）》2015年第6期18-22,共5页Journal of Dali University

基　　金：国家自然科学基金资助项目(61462003);大理学院博士启动基金资助项目(KYBS201213);云南省教育厅科学研究基金重点项目(2014Z137)

摘　　要：基于双线性对的无证书密码系统去除了公钥基础设施(PKI)中复杂的证书管理问题以及基于身份密码系统(IBC)固有的密钥托管问题。无需配对的无证书密码系统去除了耗时的双线性对运算,在不损安全性的同时进一步提高了无证书密码系统的效率。门限签名是标准数字签名扩展,由多个签名者共同为同一消息提供签名服务。基于无信赖者的秘密共享技术和无需配对的无证书密码技术,提出一个无需配对、无可信中心环境下的无证书门限签名方案。该方案可用于无可信服务器的分布式系统。分析表明,该方案具有较好的安全性、高效性且不依赖可信中心节点。Certificateless cryptography based on bilinear pairings resolves the problems of complicated certificate management in the Public Key Infrastructure （PKI） and inherent key escrow problem in the Identity-Based Cryptography （IBC）. Certificateless cryptography without pairing eliminates time-consuming bilinear pairings and further increases the efficiency of certificateless cryptography without losing safety. Threshold signature is an extension of the standard digital signature, in which several signers are required to provide signature service cooperatively for the same message. Based on secret sharing without a trusted party and certificateless cryptography without pairing, this paper proposes a certificateless threshold signature scheme without paring and trusted center, which can be adopted in distributed systems without trusted server. Analysis shows that this scheme is secure and efficient and does not rely on trusted center.

关 键 词：无信赖者的秘密共享 无证书签名 无双线性对 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]