Unlike Signal, Telegram does not offer end-to-end encrypted chats by default. In Telegram, you have to activate that feature on the side. You do get server-side encryption by default, though, so do ...
Telegram has had an option to send ephemeral messages in its encrypted Secret Chat mode since 2013. Last year, it rolled out a new timer feature — that could be enabled for either 24 hours or 7 days — ...