Cryptology ePrint Archive: BibTeX Citation of Report 2010/090

@misc{cryptoeprint:2010:090,
    author = {Takuya Hayashi and Naoyuki Shinohara and Lihua Wang and Shin'ichiro Matsuo and Masaaki Shirase and Tsuyoshi Takagi},
    title = {Solving a 676-bit Discrete Logarithm Problem in GF(3^{6n})},
    howpublished = {Cryptology ePrint Archive, Report 2010/090},
    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.