@misc{cryptoeprint:2008:044,
    author = {Ari Juels and Ravikanth Pappu and Bryan Parno},
    title = {Unidirectional Key Distribution Across Time and Space with Applications to RFID Security},
    howpublished = {Cryptology ePrint Archive, Report 2008/044},
    year = {2008},
    url = {http://eprint.iacr.org/2008/044},
}