## CryptoDB

### Paper: Identity-Based Directed Signature Scheme from Bilinear Pairings

Authors: Xun Sun Jian-hua Li Gong-liang Chen Shu-tang Yang URL: http://eprint.iacr.org/2008/305 Search ePrint Search Google In a directed signature scheme, a verifier can exclusively verify the signatures designated to himself, and shares with the signer the ability to prove correctness of the signature to a third party when necessary. Directed signature schemes are suitable for applications such as bill of tax and bill of health. This paper studies directed signatures in the identity-based setting. We first present the syntax and security notion that includes unforgeability and invisibility, then propose a concrete identity-based directed signature scheme from bilinear pairings. We then prove our scheme existentially unforgeable under the computational Diffie-Hellman assumption, and invisible under the decisional Bilinear Diffie-Hellman assumption, both in the random oracle model.
##### BibTeX
@misc{eprint-2008-17982,
title={Identity-Based Directed Signature Scheme from Bilinear Pairings},
booktitle={IACR Eprint archive},
keywords={applications / Bilinear pairings; Directed signature; Existential unforgeability; Identity-based cryptography; Invisibility},
url={http://eprint.iacr.org/2008/305},
note={ xun.sun.cn@gmail.com 14067 received 7 Jul 2008},
author={Xun Sun and Jian-hua Li and Gong-liang Chen and Shu-tang Yang},
year=2008
}