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WhatsApp touts this feature as a tool to make sure its users are able to keep their private talks private, even if the smartphone in question is passed around or someone is able to get into it without permission. This also works with notifications, making sure that any notifications from a locked chat does not show a preview of what is being said.
The announcement is accompanied by a video highlighting how the feature works and how it can be convenient in family settings where the phone could be borrowed several times by others to either take a photo or participate in a video chat. In it, you see the main character escape several scenarios where his private conversation could have been made public, only to be saved by the existence of this feature.
Locked chats can be accessed via the “Locked chats” folder, which can only be accessed by authenticating via the same method you use to unlock your phone. Locked chats will also be expanded in the coming months with new features such as extending the lock to companion devices and the ability to apply a different password to your locked chat folder than the one being used to unlock the device.
