Cryptology ePrint Archive: BibTeX Citation of Report 2010/219

@misc{cryptoeprint:2010:219,
    author = {Erik-Oliver Blass and Kaoutar Elkhiyaoui and Refik Molva},
    title = {Tracker: Security and Privacy for RFID-based Supply Chains},
    howpublished = {Cryptology ePrint Archive, Report 2010/219},
    year = {2010},
    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.