## CryptoDB

### Paper: Cryptanalysis and improvement of an ID-based ad-hoc anonymous identification scheme at CT-RSA 05

Authors: Fangguo Zhang Xiaofeng Chen URL: http://eprint.iacr.org/2005/103 Search ePrint Search Google An ad-hoc anonymous identification scheme is a new multi-user cryptographic primitive that allows participants from a user population to form ad hoc groups, and then prove membership anonymously in such groups. Recently, Nguyen \cite{Lan05} proposed an ID-based ad-hoc anonymous identification scheme from bilinear pairings. However, in this paper, we propose an attack on Nguyen's ID-based ad-hoc anonymous identification scheme. We show that any one can impersonate a valid group member to perform the anonymous identification protocol successfully. Furthermore, we propose a solution to improve this scheme against our attack.
##### BibTeX
@misc{eprint-2005-12439,
title={Cryptanalysis and improvement of an ID-based ad-hoc anonymous identification scheme at CT-RSA 05},
booktitle={IACR Eprint archive},
keywords={applications /},
url={http://eprint.iacr.org/2005/103},
note={ isdzhfg@zsu.edu.cn 12875 received 31 Mar 2005, last revised 1 Apr 2005},
author={Fangguo Zhang and Xiaofeng Chen},
year=2005
}