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If this software is detecting currency, the obvious follow-up question we should ask is: what else is it detecting, how does it do this, and why?

Could it be that each image generated from Adobe Software also tags the image with unique identifying computer, timestamp information?

Given that Adobe is attempting to move their software over to their Creative Cloud service, then that is probably quite possible now.

Beyond that, I think the bigger threat to privacy by far in digital images is in EXIF data and reverse image searches.

Yup, that + what happens when it crashes? I wonder, if a network packet is sent somewhere.