Cryptology ePrint Archive: BibTeX Citation of Report 2007/350

@misc{cryptoeprint:2007:350,
    author = {David Goldenberg and Susan Hohenberger and Moses Liskov and Elizabeth Crump Schwartz and Hakan Seyalioglu},
    title = {On Tweaking Luby-Rackoff Blockciphers},
    howpublished = {Cryptology ePrint Archive, Report 2007/350},
    year = {2007},
    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.