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by eitland 269 days ago
Interesting idea and I think Nikon did with high end(?) cameras a number of years ago.

Nikon tried this a number of years ago, and I am not sure if they ever managed to stop hardware hackers from extracting their private keys, here are some examples: https://petapixel.com/2011/04/28/nikon-image-authentication-...

On a second reading it seems that Canon keys were leaked even earlier.