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Video decryption+decoding is a well-defined enough problem that you can ship silicon that does it. You can't do the same thing for the UI of a social media app.
by Retr0id 9mo ago
Video decryption+decoding is a well-defined enough problem that you can ship silicon that does it. You can't do the same thing for the UI of a social media app.
You could put the entire app within TrustZone, but then you're not trusting the app vendor any less than you were before.
- Retr0id 9mo agoAlthough now I think about it more, you could have APIs for "decrypt this [text/image] with key $id, and render it as a secure overlay at coordinates ($x, $y)"
- londons_explore 9mo agoExactly. Thats how DRM video works, and I don't see why you couldn't do the same for text.
- Retr0id 9mo agoActual DRM uses symmetric keys though, figuring out how to do the crypto in an E2EE-comaptible way would be challenging.