新的基于身份的门限签名方案

摘要

Most of the existing ID-based threshold signature schemes are based on the secret key manager's identity, but the real signers' identity is unable to determine. A new identity-based threshold signature scheme is proposed based on Paterson's signature scheme. In the proposed threshold signature scheme, the public key of each signer is generated from each signer's identity. The new scheme meets the requirement of the ID-based cryptosystems. The security of the scheme is proven under the computational Difhe-Hellman assumption. The paper show that it is resisted against adapt chosen message attack.%针对目前基于身份的门限签名方案只是基于密钥管理者身份的门限签名,而对参加签名的每个成员身份信息无法确定.论文在Paterson签名方案的基础上,给出一个新的基于身份的门限签名方案,新方案中参加签名的每个成员的公钥均由其成员身份产生,真正的符合了基于身份的签名体制的要求,并在CDH问题假设下,对该方案的安全性进行了证明,表明该方案对选择消息攻击是不可伪造的.