I've wondered how long it will be before input events are traceable to specific devices (e.g., you type 'A' on your keyboard, registered to you, and get a scanc

I've wondered how long it will be before input events are traceable to specific devices (e.g., you type 'A' on your keyboard, registered to you, and get a scancode . . . plus a few hundred bits timestamped and signed by the device before anyone can actually treat it as an 'A' keystroke). "Secure Unicode," anyone? I figure this kind of dystopian mechanism for input provenance is at least 100 years out. Please don't anyone prove me wrong.