一个新的无证书多重无链接签名方案

摘要

基于无证书密码体制,提出一个新的多重无链接签名方案.新方案允许用户在不同的应用场合中使用不同的身份信息,并要求由这些身份所导出的不同公钥对应的签名密钥是唯一的,不同公钥的使用可以保证公钥的无链接性,从而更好地保护用户的隐私.在随机预言模型下,新方案可以抵抗适应性选择消息攻击.%This paper proposed a new multiple and unlinkable signature scheme based on certificateless public key cryptography. The new scheme allowed the use of a various number of identity-based public keys in different groups or applications while keeping a single signature key. The use of different public keys can guarante public key is unlinkable and the user's privacy can be protected from attackers. The proposed scheme against the adaptive chosen-message attack under the random oracle model.