this post was submitted on 27 Nov 2023
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Photography
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Yeh, I'm pretty damn sure my Canon 5D MKII had some sort of functionality that was similar to this, with an option to embed some sort of digital-signature into the meta-data for validation (I think it was primarily designed for like police/evidence photographers or something).
Although from what I remember, it wasn't a very secure system, and someone manage to extract a private-key from one of the cameras. Allowing people to just falsify the verification signature afterwards.
Presumably nowadays with those sort of secure cryptography systems being far better understood and with dedicated chips for dealing with this sort of thing more easily available, I would imagine this newer solution will probably be more secure in the long-term.