A Proxy Blind Signature Scheme with Proxy Revocation

A proxy blind signature allows the designated proxy signer using the proxy private key to generate a blind signature on behalf of the original signer. In previous proxy blind signature schemes, there was no revocation protocol wherein the original signer could delegate his signing capability to a proxy signer. In this paper, we propose a proxy blind signature scheme with the proxy revocation, where the original signer can revoke his delegation to a proxy signer whenever he wants. Moreover, the proposed scheme satisfies all security properties for the proxy blind signature.