A Strong Forward-Secure Proxy Blind Signature Scheme

Abstract

Combining the mechanism of the hash chain with the forward-secure proxy blind signature, we firstly propose a new strong forward-secure proxy blind signature scheme. This scheme has many secure characters, such as strong forward security, namely, although the attacker get the key in some period , the attacker cannot forge the signature in the past and future periods, verifiability, unforgeability, distinguishability, identifiability, strong blindness.