Cryptology ePrint Archive: BibTeX Citation of Report 2008/333

@misc{cryptoeprint:2008:333,
    author = {Johannes Buchmann and Richard Lindner and Markus Rückert and Michael Schneider},
    title = {Explicit hard instances of the shortest vector problem},
    howpublished = {Cryptology ePrint Archive, Report 2008/333},
    year = {2008},
    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.