Cryptology ePrint Archive: BibTeX Citation of Report 2003/208

@misc{cryptoeprint:2003:208,
    author = {Fangguo Zhang and Reihaneh Safavi-Naini and Willy Susilo},
    title = {ID-Based Chameleon Hashes from Bilinear Pairings},
    howpublished = {Cryptology ePrint Archive, Report 2003/208},
    year = {2003},
    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.