Cryptology ePrint Archive: BibTeX Citation of Report 2008/345

@misc{cryptoeprint:2008:345,
    author = {Jooyoung Lee and Choon Sik Park},
    title = {An Efficient Authenticated Key Exchange Protocol with a Tight Security Reduction},
    howpublished = {Cryptology ePrint Archive, Report 2008/345},
    year = {2008},
    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.