Fair Blind Proxy Blind Signature Scheme with the Property of Proxy Revocation

In this paper, a fair blind proxy blind signature scheme with the property of proxy revocation is proposed. For many previous proxy signature schemes, it is difficulty for the original signer to revoke securely the proxy power. The proposed scheme comes over this weakness, in which the previous proxy signature can be easily verified after the original signer drawing back the proxy power. In the scheme, the identity of the proxy signer is blind to the original signer, both the original signer´s interests and the proxy signer´s privacy are protected, thus the fairness for the original signer and the proxy signer is well guaranteed. Since the scheme allows the proxy signer use different alias to sign the document in each time, it can be adaptable applied to many practical applications