Cryptology ePrint Archive: BibTeX Citation of Report 2004/003

@misc{cryptoeprint:2004:003,
    author = {Erik Zenner},
    title = {On the Role of the Inner State Size in Stream Ciphers},
    howpublished = {Cryptology ePrint Archive, Report 2004/003},
    year = {2004},
    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.