Cryptology ePrint Archive: BibTeX Citation of Report 2005/448

@misc{cryptoeprint:2005:448,
    author = {Souradyuti Paul and Bart Preneel},
    title = {On the (In)security of Stream Ciphers Based on Arrays and Modular Addition (Full Version)},
    howpublished = {Cryptology ePrint Archive, Report 2005/448},
    year = {2005},
    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.