That's true but then why does it need to be a hardware backed key as part of the camera?
It will be people who need to learn how to sign and encrypt and manage their keys.
It will be people who need to learn how to sign and encrypt and manage their keys.
I don't believe it will be possible in practice to "granularize" trust like that. You trust a person or an institution (a person is already more ideal though). Going even further will not work in practice.