Cryptology ePrint Archive: BibTeX Citation of Report 2011/116

@misc{cryptoeprint:2011:116,
    author = {Long Hoang Nguyen and Andrew William Roscoe},
    title = {Short-output universal hash functions and their use in fast and secure message authentication},
    howpublished = {Cryptology ePrint Archive, Report 2011/116},
    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.