International Association for Cryptologic Research

International Association
for Cryptologic Research


Fair Blind Signatures without Random Oracles

Georg Fuchsbauer
Damien Vergnaud
Search ePrint
Search Google
Abstract: A fair blind signature is a blind signature with revocable anonymity and unlinkability, i.e., an authority can link an issuing session to the resulting signature and trace a signature to the user who requested it. In this paper we first revisit the security model for fair blind signatures given by Hufschmitt and Traor\'e in 2007. We then give the first practical fair blind signature scheme with a security proof in the standard model. Our scheme satisfies a stronger variant of the Hufschmitt-Traor\'e model.
  title={Fair Blind Signatures without Random Oracles},
  booktitle={IACR Eprint archive},
  keywords={public-key cryptography / Blind signatures, Revocable anonymity, Standard model, Groth-Sahai proof system.},
  note={ 14664 received 23 Feb 2010, last revised 24 Feb 2010},
  author={Georg Fuchsbauer and Damien Vergnaud},