Cryptology ePrint Archive: BibTeX Citation of Report 2007/472

@misc{cryptoeprint:2007:472,
    author = {Jean-Philippe Aumasson and Simon Fischer and Shahram Khazaei and Willi Meier and Christian Rechberger},
    title = {New Features of Latin Dances: Analysis of Salsa, ChaCha, and Rumba},
    howpublished = {Cryptology ePrint Archive, Report 2007/472},
    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.