It doesn't matter what these articles say. Under what Constitutional law is law enforcement going to force Apple and Google to change their encryption systems?

It doesn't matter what these articles say. Under what Constitutional law is law enforcement going to force Apple and Google to change their encryption systems? Perhaps the NSA and the (still unconstitutionally vague) FISA court can force them by putting a secret gun to Tim's head but ordinary non-secret law enforcement organizations have no legal way to challenge this that would pass even this Supreme Court which is where anything would eventually wind up years from now.