Earlier quoted context omitted.
That implication is exactly what Colin provides with my tarsnap backups. He (or Amazon) can respond to legal requests with my strongly encrypted data, and Neither Colin/tarsnap nor Amazon can provide them with my private keys. You can design your systems this way. It appears you're allowed under US law. It seems there's companies jumping through hoops on behalf of the NSA and/or FBI to build systems that _dont_ provi…
Note that Colin _could_ conspire with / be compelled by the NSA to attempt to convince me to "upgrade" my local tarsnap code with a backdoored version Far more likely is that they'd oblige him to upgrade everyone's tarsnap with a backdoored version, just in case.
For example if you have private CCTV on your premises, a court can demand access to whatever footage they have captured but I don't think that they can force you to install hidden cameras on your property.
Isn't stuff like that usually done as part of a bargain, like having somebody wear a wire in exchange for not going to jail.