Cryptology ePrint Archive: BibTeX Citation of Report 2007/204

@misc{cryptoeprint:2007:204,
    author = {Shu Yun Lim and Chuan Chin Pu and Hyo Taek Lim and Hoon Jae Lee},
    title = {Dragon-MAC: Securing Wireless Sensor Networks with Authenticated Encryption},
    howpublished = {Cryptology ePrint Archive, Report 2007/204},
    year = {2007},
    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.