Recently, WhatsApp, Meta’s messaging app, released the username reservation functionality for its millions of supporters. This new feature, announced on Tuesday, July 9, 2026, quickly sparked debates about privacy, as it is now possible to locate and start conversations with other users without needing their phone number.

In parallel with the update, the company led by Mark Zuckerberg also introduced “username keys”, which function as a type of password. This code is essential for a person to be able to send the first message to another contact using only the username.

Below, see details on how username keys work and learn how to configure this “password” for your interactions on WhatsApp.

Understand how security keys work for usernames

Usernames on WhatsApp operate in a similar way to those that already exist on platforms such as Instagram, TikTok and X, serving as replacements for phone numbers. To start a conversation this way, it is essential to type the exact “@” of the desired contact.

For example, if a user has chosen the name “@mixvale123”, a search for “@mixvale12” in the application will not present suggestions for profiles with similar names, guaranteeing the exclusivity of the identification.

Additionally, an extra layer of privacy has been added through access keys. This measure was created to prevent unwanted individuals from sending messages if they discover someone’s username on another social network and it is the same one used on WhatsApp. This functionality adds a crucial level of security, especially in a digital ecosystem where profile visibility becomes increasingly interconnected.

With the implementation of these “passwords”, it is necessary for the sender to know both the precise username and the four-digit PIN to initiate a dialogue.

Meta is responsible for generating these passwords randomly. Although users cannot choose specific numbers, they can generate new keys as many times as necessary until they find a four-digit combination that is satisfactory.

After sharing the key so that someone can initiate contact, the user has the option of generating a new one, which prevents the previous “password” from being used or shared inappropriately.

It is essential to highlight that these keys are exclusive for use with usernames. To date, there is no functionality that allows you to apply a password to conversations initiated traditionally via phone number.

Step by step: how to set up a passkey for your username

To set a passkey for your username profile, follow the instructions below:

• Open the WhatsApp application on your cell phone and access the “Settings” menu;
• Tap the “Account” option;
• Select “Username”;
• Go to “Contact me by username”;
• Select the option “People who know my key”.

When selecting this option, a key will be automatically generated. If you prefer a different one, just tap “Username key” and then “Generate another key.”

Full release of usernames: what is the deadline for the Goal?

Currently, only username reservation is available to users. This initial phase was implemented to meet high demand and ensure everyone has time to choose the “@” they want.

According to information from Meta, the effective use of usernames will be implemented in the coming months. Users will receive a notification as soon as the functionality is fully active. The company also allows the use of the same profile names already used on Facebook and Instagram, but experts warn of the potential privacy risks that this practice can bring.