To the several downvoters: My point was not that it's okay to have surveillance.
My point was that there is no uncompromised electronical communications platform. If you wish to communicate using anything having room for a man in the middle attack, it is very hard to proof that the medium is NOT compromised by a nation state or another third party.
You can communicate fairly securely without the messaging being intercepted by black hat non-nationstate third parties. I don't think anyone can guarantee security against nation states.
So if you want to communicate, you either communicate, or you don't, but requiring a 100% tamperproof platform is really hard.
For example, Echelon system probably had/has intercept capability for all phone traffic in europe:
https://en.wikipedia.org/wiki/ECHELON
These systems were in place in 1960:s. AFter that modern telecoms substrate was developed in close collaboration with nation state defence parties. As a non-expert, there is no reason to think any platform is secure from nation state eavesdropping.