Cryptology ePrint Archive: BibTeX Citation of Report 2006/322

@misc{cryptoeprint:2006:322,
    author = {Yassir Nawaz and Kishan Chand Gupta and Guang Gong},
    title = {Algebraic Immunity of S-boxes Based on Power Mappings: Analysis and Construction},
    howpublished = {Cryptology ePrint Archive, Report 2006/322},
    year = {2006},
    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.