Safeguarding the privacy of a user's personal information is a technological problem that should be solved through the development and correct usage of cryptographic primitives that secure that data.
Wrong. It's a people problem. Any technological measure capable of reliably recovering information will be utilized or forced to be tapped by law enforcement. The problem is the law. The solution is not tech. The solution is changing the law. The cryptographic primitive approach is an elitist wet dream. The moment you employ it in enough sketchy contexts, then it itself will be seen as evidence of criminal doing. The UK/Europe has already been sniffing in that direction w.r.t possession of heavily encrypted phone handsets/telephony systems.