The article talks about difficulties stopping serious crime when encryption appears secure.
Since crime is in law enforcement too, we obviously need open public surveillance of our enforcement workers, to give them our private keys, and once both those things happen we can probably together stop all injustice efficiently. Most of the public are not members of organised crime trying to coerce the police. Most of the public want a safe environment where they can raise a forthrightly protected family in the ways they choose.
