If you can ignore some of the subtle insults and unsubstantiated comments on Telegram, this article provides some good info on security settings that you may like to review.

https://www.forbes.com/sites/zakdoffman/2021/01/23/stop-using-signal-and-telegram-until-you-change-settings-after-whatsapp-and-imessage-privacy-backlash/?sh=6af93623040d

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* Origin: Fido by Telegram BBS by Stas Mishchenkov (2:460/58)