[eli]

It's complicated, but that's kinda what happened to the Lavabit "secure" webmail service. When the owner wouldn't install a backdoor, the FBI sought the private encryption keys so they could MITM the whole site.

https://www.newyorker.com/tech/elements/how-lavabit-melted-d...

[angry_octet]

That isn't building an interception mechanism, it's revealing some private information Lavabit held.