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Messages in secret chats are stored on server until downloaded by recipient. So there is no such problem like in Skype. Push notifications also work fine there, except on iOS they …

They did give him a reward. Telegram has just posted the translation on twitter. Moved to separate discussion: https://news.ycombinator.com/item?id=6950129

What is the point for server side open source? You can never trust that this code is launched on the instance which answers to your client' requests. If you don't trust the backend…

Have you tried the app? I've moved my top-5 chats from WhatsApp just because of speed! The messages are sent really fast. But if you know any other messenger apps for iOS, which ar…

I guess, that the problem is in encryption key exchange. Cloud chats are easy to synchronize between devices. Secret chats require unique encryption key for each chat.