Cryptology ePrint Archive: BibTeX Citation of Report 2010/426

@misc{cryptoeprint:2010:426,
    author = {Huihui Yap and Khoongming Khoo and Axel Poschmann},
    title = {Parallelizing the Camellia and SMS4 Block Ciphers - Extended version},
    howpublished = {Cryptology ePrint Archive, Report 2010/426},
    year = {2010},
    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.