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                   B O S T O N   U N I V E R S I T Y
                      Computer Science Department
                          C O L L O Q U I U M
                     Wednesday, December 5, 3:00 PM 
                       (Coffee served at 2:45PM)
                         Seminar Room / MCS 135

			
			    Digital Secrets

			      Hany Farid
		     Department of Computer Science
			    Dartmouth College


			       Abstract

Techniques for information hiding have become increasingly more
sophisticated and widespread. With high-resolution digital images as
carriers, detecting hidden messages has become considerably more
difficult. I describe a new approach to detecting hidden messages in
images. The approach uses a wavelet-like decomposition to build
higher-order statistical models of ``natural'' images, and a Fisher
linear discriminant analysis to discriminate between untouched and
adulterated images.



Host: Stan Sclaroff
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