Cryptology ePrint Archive: BibTeX Citation of Report 2011/452

@misc{cryptoeprint:2011:452,
    author = {Manish Garg and Sugata Gangopadhyay},
    title = {The Good lower bound of Second-order nonlinearity of a class of Boolean  function},
    howpublished = {Cryptology ePrint Archive, Report 2011/452},
    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.