Cryptology ePrint Archive: BibTeX Citation of Report 2007/337

@misc{cryptoeprint:2007:337,
    author = {W. Bamberger and O. Welter and S. Spitz and M. Marhöfer},
    title = {Mobile Phones as Secure Gateways for Message-Based Ubiquitous Communication (Revised)},
    howpublished = {Cryptology ePrint Archive, Report 2007/337},
    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.