@misc{cryptoeprint:2004:293,
    author = {Jana Dittmann and Stefan Katzenbeisser and Christian Schallhart and Helmut Veith},
    title = {Provably Secure Authentication of Digital Media Through Invertible Watermarks},
    howpublished = {Cryptology ePrint Archive, Report 2004/293},
    year = {2004},
    url = {http://eprint.iacr.org/2004/293},
}