Cryptology ePrint Archive: BibTeX Citation of Report 2013/427

@misc{cryptoeprint:2013:427,
    author = {Jiangtao Han and Haining Fan},
    title = {Toeplitz matrix-vector product based GF(2^n) shifted polynomial basis multipliers for all irreducible pentanomials},
    howpublished = {Cryptology ePrint Archive, Report 2013/427},
    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.