Cryptology ePrint Archive: BibTeX Citation of Report 2009/423

@misc{cryptoeprint:2009:423,
    author = {Atsushi Fujioka and Koutarou Suzuki and Berkant Ustaoglu},
    title = {Utilizing postponed ephemeral and pseudo-static keys in tripartite and identity-based key agreement protocols},
    howpublished = {Cryptology ePrint Archive, Report 2009/423},
    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.