OK...let's say I receive a photo that I expected to contain stegoed information on it, but then find that there's nothing I can retrieve using the likely methods or software. Is it possible to determine that the photo 'originally' (ie, when it was sent to me) contained stegoed information, but that it was intercepted in transit and the real message overwritten with noise or whatever? Now I know pretty much nothing about this subject, but I would suppose that de-stegoing a photo must like some kind of spatial spectral fingerprint that should be visible after the photo is FFT'd (is there freeware software out there?). Now I IMAGINE that a sophisticated interceptor could substitute 'believable' de-stego-ing noise so that it would look like the photo never had any stego in the first place. OR...is this actually 'impossible' to do perfectly? And then, what if the interceptor tried to put an alternate message in there instead? Is there a way to tell that there was originallya different message there? My assumption first of all is that nothing was done to prepare the photo against these possibilities. A simple stego message was placed without real thought about whether it might be intercepted and altered. -TD _________________________________________________________________ Take advantage of our best MSN Dial-up offer of the year  six months @$9.95/month. Sign up now! http://join.msn.com/?page=dept/dialup