Cryptology ePrint Archive: BibTeX Citation of Report 2012/547

@misc{cryptoeprint:2012:547,
    author = {Bodhisatwa Mazumdar and Debdeep Mukhopadhyay and Indranil Sengupta},
    title = {Constrained Search for a Class of Good S-Boxes with Improved DPA Resistivity},
    howpublished = {Cryptology ePrint Archive, Report 2012/547},
    year = {2012},
    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.