That depends on who you talk to. Signal and Telegr
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Open Whisper Systems was started by the son of a ultra wealthy Russian oligarch. The end to end encryption standard is becoming a normal thing now but the server in the middle is always going to be a problem. Based on what I read on secure messaging — encryption alone is not going to fix the problem.
https://news.ycombinator.com/item?id=12880520
https://fossbytes.com/best-secure-encrypted-messaging-apps/