[csandreasen]

Demanding keys would conflict with the 5th Amendment; in the few cases that I'm aware of[1][2] where a defendant was successfully compelled to decrypt their files, the suspect had either already demonstrated that the evidence was in their possession and thus given up their right to self- incriminate or been granted immunity. Also, with end-to-end encryption law enforcement won't be able to decrypt regardless of whether or not they have a warrant, and they need a warrant to initiate a wiretap to begin with.

[1] https://news.ycombinator.com/item?id=9663447

[2] https://news.ycombinator.com/item?id=9663378