WhatsApp says 1 billion users now use passkeys, while stronger two-step verification and caller context add new layers of account protection.WhatsApp has reached a significant security milestone: more than one billion people now use passkeys to protect access to their accounts. At the same time, Meta is adding stronger two-step verification and more information about calls from people who aren’t in a user’s contacts. Passkeys let users sign back into WhatsApp with a fingerprint, Face ID or their device’s screen-lock code instead of relying on passwords, PINs or one-time codes. WhatsApp now also allows people who use both Android and iOS devices to add more than one passkey to the same account, which removes one of the practical limitations of the earlier implementation. “More than 1 billion people now use a passkey: A passkey lets you log back into WhatsApp with your fingerprint, face ID, or screen lock code. It’s the fastest and most secure way to verify it’s really you, with no codes or PINs.” reads the announcement published by WhatsApp. “More than a billion people have already set one up, and you can now add more than one passkey to your account if you use both Android and iOS devices. To get started, go to Settings > Account > Passkeys.”For people who move between platforms, the ability to register multiple passkeys should make account recovery less dependent on a single device.It is important to highlight that WhatsApp is moving account protection away from secrets that users have to remember or type. Passkeys rely on credentials stored on the device and protected by its existing biometric or screen-lock mechanism, which also makes phishing them much harder than a traditional password or verification code.WhatsApp is also changing its two-step verification system. Until now, the additional protection relied on a six-digit PIN. The company has now upgraded it to a full password that can be longer, use letters and numbers, and include special characters.“Two-step verification is an extra protection layer that helps prevent someone from taking over your account, even if they get hold of your one-time passcode.” continues the announcement. “Until now it was a six-digit PIN, we’ve now upgraded it to a full password: longer, alphanumeric, and even with special ch@racters to make it harder to guess. If you’ve been using “123456,” this is your sign to upgrade.”That’s a small interface change with a meaningful security consequence. A short numeric PIN has a limited number of possible combinations and encourages users to choose predictable values, while a longer password gives account owners a much stronger second factor.WhatsApp makes the point in unusually direct terms, even calling out the classic 123456 choice. If that’s still protecting an account, the app has just provided a fairly unambiguous hint.The change also addresses a specific account-takeover scenario. If an attacker manages to obtain a user’s one-time registration code, the additional password can still prevent the takeover from succeeding.The third change targets a different problem: social engineering. On Android, WhatsApp will now provide additional context when someone outside the user’s contacts calls.The information can include whether the number comes from another country and whether the caller shares any groups with the recipient. That gives users a little more information before they decide whether to answer. “When you get a call from someone not saved in your contacts, a little context can help you decide whether to pick up. On Android, you’ll now see more information about a non-contact caller, like whether the number is from a different country and if you have any groups in common.” concludes the announcement. “Scammers rely on urgency – now you can take a beat with some more info before answering.”It’s a simple addition, but it addresses a common weakness in fraud attempts: pressure. An unexpected call creates a sense of urgency, and attackers often use that moment to persuade someone to disclose information, click a link or continue the conversation on their terms.Giving the recipient more context doesn’t stop a scammer from calling. It gives the user a reason to pause before answering.Taken together, the three changes target different parts of the same account-security problem. Passkeys make authentication harder to steal, stronger two-step verification provides another barrier when a one-time code is compromised, and caller context gives users more information before a potentially suspicious interaction begins. The billion-user passkey figure is also worth watching beyond WhatsApp. It suggests that phishing-resistant authentication is no longer an experimental security feature limited to security-conscious users. At this scale, the challenge shifts from convincing people that passkeys are safer to making sure they understand when and how to use them.Follow me on Twitter: @securityaffairs and Facebook and MastodonPierluigi Paganini(SecurityAffairs – hacking, WhatsApp)