Cryptology ePrint Archive: BibTeX Citation of Report 2006/131

@misc{cryptoeprint:2006:131,
    author = {Mike Burmester and Tri van Le and Breno de Medeiros},
    title = {Provably Secure Ubiquitous Systems: Universally Composable RFID Authentication Protocols},
    howpublished = {Cryptology ePrint Archive, Report 2006/131},
    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.