Cryptology ePrint Archive: BibTeX Citation of Report 2011/126

@misc{cryptoeprint:2011:126,
    author = {Daniel Engels and Markku-Juhani O. Saarinen and Peter Schweitzer and Eric M. Smith},
    title = {The Hummingbird-2 Lightweight Authenticated Encryption Algorithm},
    howpublished = {Cryptology ePrint Archive, Report 2011/126},
    year = {2011},
    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.