2007 IEEE International Conference on Image Processing - San Antonio, Texas, U.S.A. - September 16-19, 2007

Technical Program

Paper Detail

Paper:TA-L1.2
Session:Distributed Source Coding II: Distributed Image and Video Coding and Their Applications
Time:Tuesday, September 18, 10:10 - 10:30
Presentation: Special Session Lecture
Title: IMAGE AUTHENTICATION BASED ON DISTRIBUTED SOURCE CODING
Authors: Yao-Chung Lin; Stanford University 
 David Varodayan; Stanford University 
 Bernd Girod; Stanford University 
Abstract: Image authentication is important in content delivery via untrusted intermediaries, such as peer-to-peer (P2P) file sharing. Many differently encoded versions of the original image might exist. On the other hand, intermediaries might tamper with the contents. Distinguishing the legitimate diversity of encodings from malicious manipulation is the challenge addressed in this paper. We develop a novel approach based on distributed source coding for the problem of backward-compatible image authentication. The key idea is to provide a Slepian-Wolf encoded quantized image projection as authentication data. This version can be correctly decoded only with the help of an authentic image as side information. Distributed source coding provides the desired robustness against legitimate encoding variations, while detecting illegitimate modification. We demonstrate false acceptance rates close to zero for authentication data sizes that are only a few percent of the compressed image size.



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