WhatsApp is reportedly working on a new privacy-centric feature called the "username key," a tool designed to give users more control over who can contact them. First spotted by WABetaInfo, this feature builds on WhatsApp's earlier idea known as the "username PIN," but with a clearer purpose—and a new name to match. 

What Is the Username Key?

At its core, the username key is like a digital passcode. When enabled, anyone who wants to message you on WhatsApp using your username will also need to enter this secret key. It's a simple but clever way to prevent unwanted messages from strangers who might happen to know your username.

This is especially relevant as WhatsApp gradually introduces the ability for users to connect via usernames, bypassing the need to share personal phone numbers. While that's convenient, it also opens the door to uninvited messages—something the username key is specifically meant to address.

How It Works

To use the feature, users must first set their own key—a custom code that acts like a filter. Only those who know the key can initiate a conversation. That means you can comfortably share your username without worrying about random people flooding your inbox.

For those who prefer open communication, WhatsApp isn't forcing the feature. It's entirely optional. You can choose not to set a username key at all, which allows anyone with your username to message you freely.

Extra Guidance and Notifications

To keep users informed, WhatsApp plans to display a notification banner at the top of the Chats tab for anyone who has set a username but hasn't configured a key yet. It's a helpful reminder that the feature exists and can be activated to strengthen privacy.

The shift in name—from "username PIN" to "username key"—also seems to be a deliberate move to avoid confusion. WhatsApp likely wanted to distance the feature from security terms like "two-step verification," ensuring users understand it's about controlling who can reach out, not logging in.

Still in Development

The username key is still being developed, and there's no official word yet on when it will roll out to users. As with many beta features, the final version may look slightly different or include additional tweaks before public release.

That said, it's a welcome step toward letting users define their own communication boundaries—and yet another sign that WhatsApp is paying closer attention to user privacy in an increasingly connected world.