@misc{cryptoeprint:2005:103,
    author = {Fangguo Zhang and Xiaofeng Chen},
    title = {Cryptanalysis and improvement of an ID-based ad-hoc anonymous identification scheme at CT-RSA 05},
    howpublished = {Cryptology ePrint Archive, Report 2005/103},
    year = {2005},
    url = {http://eprint.iacr.org/2005/103},
}