WhatsApp already has several security and privacy-centric features, such as end-to-end encryption, encrypted chat backup, disappearing messages, screenshot blocking, and the ability to control who can access the last seen status, among others. With the latest update, Meta is further strengthening WhatsApp’s privacy and security features.
How to enable chat lock on WhatsApp
Download or update WhatsApp to the latest version on both Android and iOS devices Go to the specific chat that you would like to lock Click on the profile picture You will see a new option called “chat lock” right below the disappearing message menu Enable chat lock and authenticate using your phone password or biometrics
How to access locked chats on WhatsApp
Swipe down on the WhatsApp home page to access all the locked chats