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[–] 2 points 2 years ago (1 child)

I dont know much about it, but Wikipedia says that MTProto is specifically for "secret chats":

For encrypted chats (branded as Secret Chats), Telegram uses a custom-built symmetric encryption scheme called MTProto.

https://en.m.wikipedia.org/wiki/Telegram_(software)#Architecture

Maybe Wikipedia is misleading here

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  • [–] 2 points 2 years ago*

    You're right, it is misleading. There are different "flavours" of MTProto. See here:

    https://core.telegram.org/mtproto

    This page deals with the basic layer of MTProto encryption used for Cloud chats (server-client encryption). See also:

    • Secret chats, end-to-end-encryption

    • End-to-end encrypted Voice Calls

    (The major difference is simply whether the server and client share a key or two clients)

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