A Practical Proxy Signature Scheme Based on Elliptic Curve
一种性能良好的基于椭圆曲线上的代理签名方案*

A proxy signature scheme based on elliptic curve discrete logarithm problem is proposed. This scheme not only satisfies seven fundamental properties of proxy signature, but also effectively controls the problem of delegation power misuse, which has not been satisfactorily solved at present. In this scheme, the proxy signer can sign a signature N times at most. If he violates the condition, his private key will be revealed. So, this scheme can control the delegation power of the proxy signer. In addition, there are fewer parties involved in the signing process. It is characterized with high safety, less private key quantity and convenient use.