My original title was too long. It went like this: What is the most secure form of CONSISTENT communication and information, over the internet? Would specific network protocols (which I know little of) be necessary to achieve it?
If a group wanted to communicate their thoughts and ideas and information back and forth with one another, across borders and without limitation on the materials used to exchange that information (documents, texts, discussions, videos, audio files, Word/Excel/Powerpoint, you name it)...
...what would be the most secure method of keeping those communications private from ANY parties who might try looking in? Is this even possible in today's world, and if by degrees, to what degrees?