## CryptoDB

### Paper: Fast and Proven Secure Blind Identity-Based Signcryption from Pairings

Authors: Tsz Hon Yuen Victor K. Wei URL: http://eprint.iacr.org/2004/121 Search ePrint Search Google We present the first blind identity-based signcryption (BIBSC). We formulate its security model and define the security notions of blindness and parallel one-more unforgeability (p1m-uf). We present an efficient construction from pairings, then prove a security theorem that reduces its p1m-uf to Schnorr??s ROS Problem in the random oracle model plus the generic group and pairing model. The latter model is an extension of the generic group model to add support for pairings, which we introduce in this paper. In the process, we also introduce a new security model for (non-blind) identity-based signcryption (IBSC) which is a strengthening of Boyen??s. We construct the first IBSC scheme proven secure in the strenghened model which is also the fastest (resp. shortest) IBSC in this model or Boyen??s model. The shortcomings of several existing IBSC schemes in the strenghened model are shown.
##### BibTeX
@misc{eprint-2004-12093,
title={Fast and Proven Secure Blind Identity-Based Signcryption from Pairings},
booktitle={IACR Eprint archive},
keywords={Blind Identity Based Signcryption},
url={http://eprint.iacr.org/2004/121},
note={ kwwei@ie.cuhk.edu.hk 12582 received 22 May 2004, last revised 13 Jun 2004},
author={Tsz Hon Yuen and Victor K. Wei},
year=2004
}