[wulfstan]

> In those cases, you need a judge or someone to approve the seizure. With a backdoor that can be opened at any time, you should consider that nothing will be private because there is no one who is going to be monitoring it 24/7 to make sure that there are no abuses.

I'm not sure you've read what I wrote correctly. My hypothetical system would not allow the backdoor to be opened at any time, but it would require a certificate to be issued (derived from the manufacturer / application creator's root) that gives limited, expiring access on the production of court-authorised warrant, in exactly the same way a judge gives the police permission to enter your physical property.