Cryptology ePrint Archive: BibTeX Citation of Report 2007/105

@misc{cryptoeprint:2007:105,
    author = {Nicholas A. Howgrave-Graham},
    title = {Isodual Reduction of Lattices},
    howpublished = {Cryptology ePrint Archive, Report 2007/105},
    year = {2007},
    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.