Anyway, I don't know why HN crowds tend to aggressive with Telegram. Personally I like it and use it like a social platform.
[1] https://www.reuters.com/article/world/exclusive-apple-droppe...
There is E2E encryption for private ono on one conversations, but it is off by default and the option to enable it is buried behind a few screens ans several clicks..
And it is completely unavailable for group chats..
If you want more details, Matthew Green, the famous cryptographer from Johns Hopkins University have reviewed it recently
https://blog.cryptographyengineering.com/2024/08/25/telegram...
If you do not enable E2E it will not use MTProto and not have E2E encryption.
And all of this is only available for private chats, none is available for groups chats..
The question proposed is that Telegram was monitoring private chats on the client side, but they do not need to do that unless E2E is enabled..
If you do not have E2E enabled then everything you send is in the open while in their servers..
So, if you do not have private chat enabled then Telegram does not need to make any type of client side monitoring, they can just monitor what is going trough their servers because it is all in the open..