基于ECC的防欺诈门限签名方案

门限答签名是一种由秘密共享和数字签名相结合而产生的签名体制,妥善解决密钥管理中的密钥泄漏和遗失问题,有利于提高系统的安全性.基于椭圆曲线密码体制,利用shamir的门限机制,提出了一种可以防欺诈的门限签名方案.该方案无需可信中心来生成和分发密钥,签名发布时,参与者间无需进行秘密通信,能够有效地抵制群内参与者和群外攻击者的欺诈,同时证明了其正确性和安全性,分析表明该方案的安全性是基于椭圆曲线离散对数问题的难解性,并且无需可信中心.

Anti-deception threshold signature scheme based on ECC

Threshold signature is a kind of signature system that comes from the combination of secret sharing and digital signature, and it properly solves the problems of key compromise and loss in key management, which is helpful to improve the system security. Based on the elliptic curve cryptography (ECC) and Shamir threshold mechanism, an anti-deception threshold signature scheme is proposed. No trusted party for generating and distributing keys shall be required for this scheme, and the secret communication is not needed when participants publish signature, which can effectively resist the interior and exterior attackers. The validity and security of the scheme was proved, and analysis shows that the security of the scheme is based on the intractability of the elliptic curve cryptography discrete logarithm problem and it requires no trusted party.