Cryptology ePrint Archive: BibTeX Citation of Report 2004/246

@misc{cryptoeprint:2004:246,
    author = {Nenad Dedic and Gene Itkis and Leonid Reyzin and Scott Russell},
    title = {Upper and Lower Bounds on Black-Box Steganography},
    howpublished = {Cryptology ePrint Archive, Report 2004/246},
    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.