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Meeting Number:   1

September 28, 2005

This is the inaugural meeting of the Baltimore Chapter of the IEEE Signal Processing Society.


Multimedia Forensics for Tracing Traitors


K. J. Ray Liu
Department of Electrical and Computer Engineering
University of Maryland, College Park


Wednesday, September 28, 2005


5:45 PM:   Food and Elections
6:15 PM:   Talk begins


Historical Electronics Museum (HEM)
1745 W. Nursery Road, Linthicum, MD 21090

Please Respond To


Digital fingerprinting is an emerging technology for identifying users who have legitimate access to plaintext content but may use the content for unintended purposes, such as duplication and redistribution. For multimedia, fingerprints can be put into the content using embedding techniques that are typically concerned with robustness against a variety of attacks mounted by an individual. Ensuring the appropriate use of multimedia content, however, is no longer a security issue with a single adversary. The global nature of the Internet has brought media closer to both authorized users and adversaries. It is now easy for a group of users with differently marked versions of the same content to work together and collectively mount attacks against the fingerprints. These attacks, known as collusion attacks, provide adversaries a cost-effective method for removing an identifying fingerprint. In this talk, tracing traitors using collusion-resistant fingerprinting for multimedia that jointly considers the encoding, embedding, and detection of fingerprints will be presented. A general formulation of fingerprint coding and modulation provides a unified framework covering orthogonal fingerprints, coded fingerprints, and other correlated fingerprints. Under this framework, we have proposed a new class of structured codes, known as Anti-Collusion Codes (ACC), and designed algorithms that allows for gathering forensic evidence of the guilt and for identifying colluders.


K. J. Ray Liu (F’03) received the B.S. degree from the National Taiwan University in 1983, and the Ph.D. degree from UCLA in 1990, both in electrical engineering. He is Professor and Director of Communications and Signal Processing Laboratories of Electrical and Computer Engineering Department and Institute for Systems Research, University of Maryland, College Park. His research contributions encompass broad aspects of wireless communications and networking, information forensics and security, multimedia communications and signal processing, bioinformatics and biomedical imaging, and signal processing algorithms and architectures.

Dr. Liu is the recipient of numerous honors and awards including best paper awards from IEEE Signal Processing Society, IEEE Vehicular Technology Society, and EURASIP; IEEE Signal Processing Society Distinguished Lecturer, EURASIP Meritorious Service Award, and National Science Foundation Young Investigator Award. He also received Poole and Kent Company Senior Faculty Teaching Award from A. James Clark School of Engineering, and Invention of the Year Award, both from University of Maryland. Dr. Liu is a Fellow of IEEE.

Dr. Liu is Vice President – Publication and on the Board of Governor of IEEE Signal Processing Society. He was the Editor-in-Chief of IEEE Signal Processing Magazine, the prime proposer and architect of the new IEEE Trans. on Information Forensics and Security, and was the founding Editor-in-Chief of EURASIP Journal on Applied Signal Processing.

Dr. Liu’s web site is:

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