Digital Cameras leave digital 'fingerprint'

Security expert Bruce Schneier, writing on his blog, points out one potential weakness of the method. "There's one important aspect of this fingerprint that the article did not talk about: how easy is it to forge?" Schneier wrote. "Can someone analyze 100 images from a given camera, and then doctor a pre-existing picture so that it appeared to come from that camera?"

That's the tricky bit - it won't be long in that little arms-race either...
 
Does that hold up even after processing shots in Photoshop etc?

I'd doubt it but the article didn't say. I realise most paedos don't tend to do a lot of post-processing on their shots but still...
 
I could be wrong on this (normally I am) but i was told some time last year that photoshop does some form of digital tag on your images thats hidden away, not the exif etc..This as far as I know stores things like your serial number and possibly your machine details ie IP address etc..
As I said not 100% on this, don't know if anyone can confirm???
 
the thing is, it may be in the PSD's, but the moment you resize or change in another program, that tag would be gone.

Leo
 
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