Proxy Blind Signature Based on ECDLP
Proxy blind signature combines the properties of both proxy signature and blind signature. In a proxy signature scheme, a signer delegates his signing power to a proxy, who signs a message on behalf of the original signer. In a blind signature scheme, the signer cannot link the relationship between the blind message and the signature of the chosen message. Therefore, it is very suitable for electronic commerce application. In this paper, a proxy blind signature scheme based on ECDLP (Elliptic Curve Discrete Logarithm Problem) has been proposed, which satisfy the security properties of both the blind signature and the proxy signature. Analysis shows that the authors' scheme is secure and efficient.