FBI chief warns encryption emboldens would-be Islamic State attackers
uk.reuters.com
uk.reuters.com
However, in the Trust-me-we-won't-spy-on-everyone" Department, both are sadly bankrupt.
If these governments were people you actually had personal dealings with, how could you trust them to keep their word?
1. DA asks court for a search warrant because a crime may have been committed.
2. If the evidence looks convincing, court issues warrant to search suspect's phone.
3. DA serves suspect with search warrant.
If the suspect won't unlock phone voluntarily, the suspect is in contempt of court and subject to legal sanctions. Why does the phone manufacturer need to get involved?
For another, good security includes deniability: You can't prove a blob of random-seeming data is or isn't encrypted data, and even granting knowledge that it is, there is no way to prove there isn't more than one key to more than one set of data.