基于椭圆曲线的限制代理签名方案

基于椭圆曲线提出了一个限制代谢签名者的代理签名次数和代理签名期限的代理签名方案。原始签名者在代理签名有效期内，能限制代理签名者的代理签名次数，当代理签名有效期过后，能收回代理签名权。该方案克服了通常的代理签名方案中一旦原始签名者将答名权委托给代理签名者，就无法控制代理签名者的代理签名次数，无法收回代理签名权的缺点，该方案是基于椭圆曲线，采用一次一密签名构造的，具有安全性高，速度快，密钥量小，便于实现等优点。

A limited proxy signature scheme based on elliptic curve

In this paper, a number-limited and time-limited proxy signature scheme is proposed based on elliptic curve. In the scheme, original signer can limit the number of proxy signature and recall the right of proxy signature as the valid time past. It overcomes the shortcomings of universal proxy signature schemes that once original signer delegates his signature right to proxy signer, he can not limit the number of proxy signature and recall the right of proxy signature. This scheme that is constructed based on elliptic curve with one-time pair of keys has the merits of security, efficiency, smaller key and easy realization.