International Association for Cryptologic Research

International Association
for Cryptologic Research


Paper: A Modular Treatment of Blind Signatures from Identification Schemes

Eduard Hauck
Eike Kiltz
Julian Loss
DOI: 10.1007/978-3-030-17659-4_12
Search ePrint
Search Google
Abstract: We propose a modular security treatment of blind signatures derived from linear identification schemes in the random oracle model. To this end, we present a general framework that captures several well known schemes from the literature and allows to prove their security. Our modular security reduction introduces a new security notion for identification schemes called One-More-Man In the Middle Security which we show equivalent to the classical One-More-Unforgeability notion for blind signatures.We also propose a generalized version of the Forking Lemma due to Bellare and Neven (CCS 2006) and show how it can be used to greatly improve the understandability of the classical security proofs for blind signatures schemes by Pointcheval and Stern (Journal of Cryptology 2000).
Video from EUROCRYPT 2019
Video provided under Creative Commons / CC BY 3.0
  title={A Modular Treatment of Blind Signatures from Identification Schemes},
  booktitle={Advances in Cryptology – EUROCRYPT 2019},
  series={Advances in Cryptology – EUROCRYPT 2019},
  author={Eduard Hauck and Eike Kiltz and Julian Loss},