Cryptology ePrint Archive: BibTeX Citation of Report 2006/255

@misc{cryptoeprint:2006:255,
    author = {Man Ho Au and Jing Chen and Joseph K. Liu and Yi Mu and Duncan S. Wong and Guomin Yang},
    title = {Malicious KGC Attacks in Certificateless Cryptography},
    howpublished = {Cryptology ePrint Archive, Report 2006/255},
    year = {2006},
    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.