Just get one crypto device from the US, one from Russia and one from China, and then encrypt your stuff using all of them, one by one. Then no single secret service could decrypt it all.
How do you know rulers of China, Russia and USA aren’t best friends ever and share information at top levels? You simply cannot trust a third party vendor anymore, no matter where they reside and this includes your cpu too.
Any information that needs security from nation state level requires physical data diodes.
I guess you can use the method you mentioned for protection against lower level actors.
What he's describing only works for symmetric encryption. Assymetric is the problematic one. There is no real way to verify the trustworthiness of VPN/proxy systems.
Any information that needs security from nation state level requires physical data diodes.
I guess you can use the method you mentioned for protection against lower level actors.