Cryptology ePrint Archive: BibTeX Citation of Report 2013/174

@misc{cryptoeprint:2013:174,
    author = {Deukjo Hong and Daesung Kwon},
    title = {Cryptanalysis of Some Double-Block-Length Hash Modes of Block Ciphers with $n$-Bit Block and $n$-Bit Key},
    howpublished = {Cryptology ePrint Archive, Report 2013/174},
    year = {2013},
    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.