无可信中心下基于身份的门限签名方案

无可信中心下基于身份的门限签名方案 Identity-Based Threshold Signature Scheme with Non-Trusted Dealer 石贤芝 SHI Xianzhi 1 first-author 林昌露 LIN Changlu 1 张胜元 ZHANG Shengyuan 1 唐飞 TANG Fei 1 福建师范大学 网络安全与密码技术福建省高校重点实验室 福建师范大学 网络安全与密码技术福建省高校重点实验室 Key Laboratory of Network Security and Cryptology,Fujian Normal University Key Laboratory of Network Security and Cryptology,Fujian Normal University 考虑到很多门限签名方案都不抵抗恶意PKG攻击的事实,本文提出了一个无可信中心下基于身份的门限签名方案,避免了该类型攻击.在该方案中,每一个签名参与者都可以验证公钥和公钥份额的合法性,从而避免了公钥份额替换攻击.给出了无可信中心下基于身份的门限签名方案不可伪造性的安全模型,并利用此安全模型给出了该方案在标准模型下的安全性证明. Considering that lots of threshold signature schemes are insecure under malicious PKG attack,we propose an identity-based threshold signature scheme with non-trusted dealer to avoid this attack.In our scheme,each signing player can verify the validity of the public key and the public key share to avoid the attack from replacing the public key share.This paper first gives the existential unforgeable security model of identity-based signature scheme with non-trusted dealer.We also prove the security from our proposed scheme in the standard model. 基于身份签名 无可信中心 标准模型 (t,n)门限签名 identity-based signature non-trusted dealer standard model (t,n) threshold signature 10.14188/j.1671-8836.2013.02.005 TN918.1 国家自然科学基金（61103247,61102093）;福建省自然科学基金（2011J05147）;福建师范大学青年骨干教师基金（fjsdjk2012049）资助项目 2013-02-01 2021-04-01 2 59