Cryptology ePrint Archive: BibTeX Citation of Report 2015/209

@misc{cryptoeprint:2015:209,
    author = {Daniel Dinu and Yann Le Corre and Dmitry Khovratovich and Léo Perrin and Johann Großschädl and Alex Biryukov},
    title = {Triathlon of Lightweight Block Ciphers for the Internet of Things},
    howpublished = {Cryptology ePrint Archive, Report 2015/209},
    year = {2015},
    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.