Cryptology ePrint Archive: BibTeX Citation of Report 2006/485

@misc{cryptoeprint:2006:485,
    author = {Hidenori Kuwakado and Masakatu Morii},
    title = {Indifferentiability of Single-Block-Length and Rate-1 Compression Functions},
    howpublished = {Cryptology ePrint Archive, Report 2006/485},
    year = {2006},
    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.