Cryptology ePrint Archive: BibTeX Citation of Report 2014/952

@misc{cryptoeprint:2014:952,
    author = {Cong Chen and Thomas Eisenbarth and Aria Shahverdi and Xin Ye},
    title = {Balanced Encoding to Mitigate Power Analysis: A Case Study},
    howpublished = {Cryptology ePrint Archive, Report 2014/952},
    year = {2014},
    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.