Cryptology ePrint Archive: BibTeX Citation of Report 2010/273

@misc{cryptoeprint:2010:273,
    author = {Niels Ferguson and Stefan Lucks and Kerry A. McKay},
    title = {Symmetric States and their Structure:  Improved Analysis of CubeHash},
    howpublished = {Cryptology ePrint Archive, Report 2010/273},
    year = {2010},
    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.