A Secure ID-Based Blind and Proxy Blind Signature Scheme from Bilinear Pairings

Abstract

ABSTRACTIn a blind signature scheme, the signer cannot link the relationship between the blind message and the signature of the chosen message. That is, blind signatures allow the user to obtain a signature of a message in a way that the signer learns neither the message nor the resulting signature. Therefore, it is very suitable for electronic commerce applications. A proxy signature allows the user to sign messages on behalf of the original signer. It is very useful when the original signer is not available to sign a specific document. A proxy blind signature combines the properties of both proxy signatures and blind signatures and is useful for e-cash and e-commerce applications. In this article, we propose a secure ID-based blind and proxy blind signature scheme from bilinear pairings. The proposed scheme satisfies the security properties of both blind and proxy blind signature scheme.