Meta CEO Mark Zuckerberg has introduced a secret code feature for Chat Lock on WhatsApp, adding an additional layer of privacy for millions of users to protect sensitive chats on the platform. Once a code is created, it can be used to hide the locked chats so that they only appear when typed into the search bar.

WhatsApp could roll out a new function called "secret code." The new capability would increase security for users who are extremely guarded about their highly intimate discussions while handing over their phone to someone else.