Cryptology ePrint Archive: BibTeX Citation of Report 2007/038

@misc{cryptoeprint:2007:038,
    author = {Joo Yeon Cho and Josef Pieprzyk},
    title = {Multiple Modular Additions and Crossword Puzzle Attack on NLSv2},
    howpublished = {Cryptology ePrint Archive, Report 2007/038},
    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.