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Digital Fingerprinting for Multimedia Forensics



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Digital Fingerprinting for Multimedia Forensics K J Ray Liu Wade Trappe Z Jane Wang and Min Wu ECE Dept University of Maryland College Park WINLAB ECE Rutgers University ECE University of British Columbia Canada Include research sponsored in part by Air Force Research Lab and NSF and contributions from Hong Zhao Shan He Hongmei Gou and Zang Li March 2005 Digital Fingerprinting and Tracing Traitors z Leak of information as well as alteration and repackaging poses serious threats to government operations and commercial markets e g pirated content or classified document studio The Lord of the Ring w1 w2 Alice Sell Bob w3 z Promising countermeasure robustly embed digital fingerprints Carl Insert ID or fingerprint often through conventional watermarking to identify each user Purpose deter information leakage digital rights management DRM Challenge imperceptibility robustness tracing capability Digital Fingerprinting for Multimedia Forensics 2 Case Study Tracing Movie Screening Copies z Potential civilian use for digital rights management DRM z Copyright industry 500 Billion business 5 U S GDP Alleged Movie Pirate Arrested 23 January 2004 A real case of a successful deployment of traitor tracing mechanism in the digital realm Use invisible fingerprints to protect screener copies of pre release movies w1 Carmine Caridi Russell friends Internet Last Samurai Hollywood studio traced pirated version http www msnbc msn com id 4037016 Digital Fingerprinting for Multimedia Forensics 4 Embedded Fingerprinting for Multimedia Embedded Fingerprinting Customer s ID Alice 101101 Multimedia Document Digital Fingerprint Fingerprinted Copy Distribute to Alice embed Alice Multi user Attacks Unauthorized re distribution Bob Fingerprinted doc for different users M Collusion Attack to remove fingerprints Extract Fingerprints Traitor Tracing Suspicious Copy Digital Fingerprinting for Multimedia Forensics 101110 Colluded Copy Identify Traitors Alice Bob Codebook 5 Anti Collusion Fingerprinting



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