The Lex Fridman podcast episode with Pavel Durov is worth listening to. Their servers are built to be very secure — of course, it would be different for others, and they use some clever tricks
replyVery secure but not investing in rolling out this mtproto they went through so much trouble to invent, nor making it usable by implementing device sync or all the other features normal chats have. Why does it smell like fish all of a sudden?
replyThat has "military grade encryption" vibes.
reply