一个新的带仲裁人无证书签名方案

无证书公钥密码系统克服了基于证书公钥密码系统的证书管理问题和基于身份公钥密码系统的密钥托管问题,并保留了他们所有的优点.为了使公钥能够快速更新,在2001年,Boneh等引入在基于RSA密码体制中获得公钥快速更新的有效方法,提出带仲裁人密码学的概念.在PKC 2004,Sherman等提出了安全仲裁人无证书公钥密码学的正式定义,并给出了安全仲裁人无证书加密方案的一般构造方法,构造了一个具体的加密方案,还给出了相应的安全模型,但并没有给出签名方案.本文给出了一个新的基于双线性对的带裁人无证书签名方案.

A New Mediated Certificateless Signature Scheme

Certificateless public key cryptography eliminates the key-escrow problem of identity-based cryptography and also preserves all of its advantages.For obtaining instantaneous revocation of a user’s public key,Boneh et al.introduced an efficient method in RSA-based cryptography,and presented the concept of security-mediated cryptography in 2001.In PKC 2004,Sherman et al.introduced the formal definition of security-mediated certificateless cryptography,present a generic construction and also a concrete encryption scheme,and give the security model,but they did not present signature scheme.This paper propose a new security-mediated certificateless signature scheme from Bilinear pairing.