Cryptology ePrint Archive: BibTeX Citation of Report 2015/988

@misc{cryptoeprint:2015:988,
    author = {Mohamed Ahmed Abdelraheem and Javad Alizadeh and Hoda A. Alkhzaimi and Mohammad Reza Aref and Nasour Bagheri and Praveen Gauravaram},
    title = {Improved Linear Cryptanalysis of reduced-round SIMON-32 and SIMON-48},
    howpublished = {Cryptology ePrint Archive, Report 2015/988},
    year = {2015},
    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.