But it’s absolutely homemade by math PhDs (not crypto specialists). And if you search for ‘telegram security’ you’ll find any number of articles pointing out a bunch of weaknesses. It’s also only half open source.
Granted, there are no known weaknesses with their protocol -- however, Telegram leads the user to believe their conversations are encrypted, which, unless they opted in to secret chats (and this is not supported on desktop ), its all in the clear.
So if you are using it on desktop, all your messages belong to Telegram, and whomever they are sharing it with.
But it’s absolutely homemade by math PhDs (not crypto specialists). And if you search for ‘telegram security’ you’ll find any number of articles pointing out a bunch of weaknesses. It’s also only half open source.