Cryptology ePrint Archive: BibTeX Citation of Report 2009/035

@misc{cryptoeprint:2009:035,
    author = {Xiaofeng Chen and Fangguo Zhang and Haibo Tian and Baodian Wei and Kwangjo Kim},
    title = {Key-Exposure Free Chameleon Hashing and Signatures Based on Discrete Logarithm Systems},
    howpublished = {Cryptology ePrint Archive, Report 2009/035},
    year = {2009},
    note = {\url{http://eprint.iacr.org/}},
}

You will need the url.sty package (comes with most LaTeX installations) for the last line. Otherwise, remove the \url command.