I still don't really understand this all discussion around Telegram. MTProto is used just with the regular chats and they decided to use a custom protocol "In o

I still don't really understand this all discussion around Telegram. MTProto is used just with the regular chats and they decided to use a custom protocol "In order to achieve reliability on weak mobile connections as well as speed when dealing with large files (such as photos, large videos and files up to 1,5 GB)" (from the FAQ). There is also a pretty long discussion here http://unhandledexpression.com/2013/12/17/telegram-stand-back-we-know-maths/ http://unhandledexpression.com/2013/12/17/telegram-stand-bac... between Telegram developers and another "security expert", where the practical reasons for their choices are explained (might be outdated, but it's still interesting to see why certain more secure algorithms might not be always the best solution). Providing cloud services, robustness and reliability can come at a cost unfortunately. If you care about having a really private conversation, just instantiate the Secret Chat. It's state of the art in terms of security. Just one of the many benchmarks https://www.eff.org/secure-messaging-scorecard https://www.eff.org/secure-messaging-scorecard.