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March 10, 2008

Mtg: Digital Fingerprinting for Multimedia Forensics

by @ 7:07 am. Filed under ALL, Communications, Computers/Software

MONDAY March 10
SCV Signal Processing Chapter
Speaker: Prof. Min Wu, ECE Dept, Institute of Advanced Computer Studies, University of Maryland
Time: Presentation at 7:00 PM
Cost: none
Place: National Semiconductor (north end of Building E), 2900 Semiconductor Drive, Santa Clara
RSVP: not required

Technology advancement has made multimedia content widely available and easy to process. ? These benefits also make it easy to make unauthorized duplication, manipulation, and redistribution of multimedia content, prompting the need of multimedia forensics research to facilitate evidence gathering in digital world. ? Embedded digital fingerprinting is one of the emerging forensics technologies. ? A unique ID that serves as a digital fingerprint to represent a receiving user is inserted into the content, and the fingerprinted content is then delivered to the user. When some copies are leaked or misused, the authority will be able to use these embedded fingerprints to trace back to the culprits. ? For multimedia data, digital fingerprints can be put into the content using conventional robust embedding techniques, which are typically concerned with surviving attacks mounted by an individual. ? Advances in communications and networking have made it easy for adversaries to work together to generate a new version based on their individual copies. ? These so-called collusion attacks provide adversaries with a cost-effective way to remove the fingerprints and circumvent the traitor-tracing mechanism.

In this talk, I will present our recent research on anti-collusion fingerprinting for multimedia data. Through jointly considering the encoding, embedding, and detection of fingerprints, our techniques can help collect digital-domain evidence and pinpoint to the sources of leak among millions of users. ? Applications of such multimedia forensic tools range from military and government operations to piracy deterrence in Hollywood and other entertainment industry.

? If time permits, I will also give a brief introduction on non-intrusive forensic analysis that explores intrinsic traces to complement the embedded fingerprints in determining the origin and processing history of digital multimedia data.

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