Secret Chats from A-Z
need to be updated
See here the difference between Cloud and Secret Chat.
Which apps support Secret Chats?
- Telegram for iOS
- Telegram for Android
- Telegram for Windows Phone
- Telegram (native macOS)
Telegram Desktop and Telegram Web do not support Secret Chats at the moment.
Search function in Secret Chats
Search is done server-side on Android, so it does only work for Cloud Chats. Secret Chats are end-to-end encrypted (not possible for the server to dercrypt them) and currently the apps do not support client-side search.
What happens to the Secret Chat when re-installing
Secret chats are canceled for both users only if the chat is deleted manually or if one of the users involved in the chat logs out.
In this case the chat appears canceled to the other user (still in the chat list, not possible to write).
If the app data are deleted or the app itself is uninstalled, the other user involved will still be able to see the Secret Chat and write in it, even if it is not existing anymore. All his messages will be shown only one tick, and the user who deleted the app / app data will never get those messages.
Link Previews in Secret Chats
Since February 2016, it's optionally possible to enable link previews in secret chats. Telegram for Android has a setting in the Telegram settings. If you enable it once, the setting will be hidden. In case you want to disable it for all secret chats again in the future, you need to reinstall the app and give up your existing secret chats. Logging out (which kills the secret chats as well) is not enough.