> That being said, I would be O.K. if the scan is performed on the device upon physical access by the authorities. You caught someone, You have enough evidence

> That being said, I would be O.K. if the scan is performed on the device upon physical access by the authorities. You caught someone, You have enough evidence to investigate the person, you are allowed to search his/her home then maybe it can be O.K. to run a fingerprint scan on the phone to look for evidence. This was an unreasonable and unnecessary capability, no amount of comprise makes it a good idea. I don't want my devices to tattle on me. They exist to serve me, not the state. Don't negotiate with terrorists.