Cryptology ePrint Archive: BibTeX Citation of Report 2011/550

@misc{cryptoeprint:2011:550,
    author = {Javad Alizadeh and Abdolrasoul Mirghadri },
    title = {A New Distinguisher for CubeHash-8/b and CubeHash-15/b Compression Functions},
    howpublished = {Cryptology ePrint Archive, Report 2011/550},
    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.