Cryptology ePrint Archive: BibTeX Citation of Report 2009/408

@misc{cryptoeprint:2009:408,
    author = {Augustin P. Sarr and Philippe Elbaz–Vincent, and Jean–Claude Bajard},
    title = {A Secure and Efficient Authenticated Diffie–Hellman Protocol},
    howpublished = {Cryptology ePrint Archive, Report 2009/408},
    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.