@misc{cryptoeprint:2007:407,
    author = {Mike Burmester and Breno de Medeiros and Rossana Motta},
    title = {Provably Secure Grouping-proofs for RFID tags},
    howpublished = {Cryptology ePrint Archive, Report 2007/407},
    year = {2007},
    url = {http://eprint.iacr.org/2007/407},
}