Cryptology ePrint Archive: BibTeX Citation of Report 2013/463

@misc{cryptoeprint:2013:463,
    author = {Reza Hooshmand, Masoumeh Koochak Shooshtari, Mohammad Reza Aref  },
    title = {Secret Key Cryptosystem based on Polar Codes over Binary Erasure Channel},
    howpublished = {Cryptology ePrint Archive, Report 2013/463},
    year = {2013},
    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.