Cryptology ePrint Archive: BibTeX Citation of Report 2010/021

@misc{cryptoeprint:2010:021,
    author = {Kitae Jeong and Yuseop Lee and Jaechul Sung and Seokhie Hong},
    title = {A note on ``Improved Fast Correlation Attacks on Stream Ciphers"},
    howpublished = {Cryptology ePrint Archive, Report 2010/021},
    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.