Cryptology ePrint Archive: BibTeX Citation of Report 2008/122

@misc{cryptoeprint:2008:122,
    author = {Seog Chung Seo and  Dong-Guk Han and Seokhie Hong},
    title = {TinyECCK: Efficient Elliptic Curve Cryptography Implementation over $GF(2^m)$ on 8-bit MICAz Mote},
    howpublished = {Cryptology ePrint Archive, Report 2008/122},
    year = {2008},
    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.