Cryptology ePrint Archive: BibTeX Citation of Report 2006/171

@misc{cryptoeprint:2006:171,
    author = {Prateek Gupta and Vitaly Shmatikov},
    title = {Key confirmation and adaptive corruptions in the protocol security logic},
    howpublished = {Cryptology ePrint Archive, Report 2006/171},
    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.