Why are Secret Chats not on the Desktop app?

​Secret chats require permanent storage on the device, something that Telegram Desktop and Telegram Web don’t support at the moment.​ The team may add this in the future. Currently, both the desktop and the web app load messages from the Cloud on startup and discard them when you quit. Since secret chats are not part of the cloud, this would kill all your secret chats each time you shut down your computer.

Secret chats are also device-specific and disappear if you log out — considering this, it is handier to keep them on the one device that you always carry with you. In case you are concerned about the security of your chats on desktop, please note that they are encrypted as well and are further protected by Telegram's distributed infrastructure. Check out this article if you want to learn more.

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