@Angle

Not much one can do about State Level Actors... They're often not worth mitigating against when setting up security protocols.

Still, tampering with communications can be detected, if both parties are using pre-shared keys and robust cryptography. Even entities like China's Great Firewall and the NSA have to follow the rules of math.

@Angle @ghedipunk Oh, and if a third party is to censor things on YOUR server, they need to either

A) Hack it or
B) Hack the user or
C) Insert themselves as a "man in the middle" (MITM), in the connection between server and user.

When it comes to state actors like China, A and B are difficult to prevent. C can be prevented using HTTPS, "cert pinning", and verifying that you've pinned the correct certificate using a separate channel of secure communication.