一种基于椭圆曲线密码机制的门限代理签名方案

2000年Hsu等人基于Sun的门限代理方案和ElGamal离散对数密码机制提出了一种新的具有已知代理人的不可否认的门限代理签名方案。该方案能满足代理签名的基本要求，并且能有效地抵御协作攻击和伪造攻击。然而，ElGamal离散对数密码机制具有诸如密钥过长、密钥管理难这样的缺陷，这些缺陷极大地限制了Hsu的方案在实际中的应用。因此将具有“短密钥”优势的椭圆密码机制引入该方案，提出一个基于椭圆曲线密码机制的门限代理方案。

Threshold Proxy Signature Scheme Based on Elliptic Curve Cryptography

In 2000,Hsu et al.presented a new nonrepudiable proxy signature scheme with known signers based Sun' scheme and discrete logarithm cryptography.The scheme meets several fundamental requirements and can effectively withstand the conspiracy attack and the forgery attack.However,discrete logarithm cryptography has some drawbacks like longer keys and difficult key management,which seriously limit application of the scheme proposed by Hsu et al.In allusion to this,this paper proposes a threshold proxy scheme based on elliptic curve cryptography with an advantage of short keys.