@misc{cryptoeprint:2009:609,
    author = {Dang Nguyen Duc and Kwangjo Kim},
    title = {Grouping-Proof Protocol for RFID Tags: Security Definition and Scalable Construction},
    howpublished = {Cryptology ePrint Archive, Report 2009/609},
    year = {2009},
    url = {http://eprint.iacr.org/2009/609},
}