Cryptology ePrint Archive: BibTeX Citation of Report 2014/267

@misc{cryptoeprint:2014:267,
    author = {Harshal Tupsamudre and Shikha Bisht and Debdeep Mukhopadhyay},
    title = {Differential Fault Analysis on the families of SIMON and SPECK ciphers},
    howpublished = {Cryptology ePrint Archive, Report 2014/267},
    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.