Cryptology ePrint Archive: BibTeX Citation of Report 2006/478

@misc{cryptoeprint:2006:478,
    author = {Donghoon Chang},
    title = {Near-Collision Attack and Collision-Attack on Double Block Length Compression Functions based on the Block Cipher IDEA},
    howpublished = {Cryptology ePrint Archive, Report 2006/478},
    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.