Passkeys Go Multi-Device
WhatsApp has quietly changed how you prove who you are when logging in. The Meta-owned messaging app announced Tuesday that it now supports multiple passkeys per account — a shift that matters more than it might sound.
Until now, you were stuck with a single passkey tied to one device. That was a headache for anyone juggling an iPhone and an Android phone, or switching devices regularly. Now you can register more than one passkey, so logging in from either platform works without friction.
The company says over 1 billion people already use a passkey to access their WhatsApp account. That’s a staggering number, and it shows how quickly the industry has moved away from traditional SMS-based authentication.
For those unfamiliar: a passkey replaces passwords with a cryptographic key stored on your device. You verify with your fingerprint, face scan, or PIN. No more typing in codes from text messages that can be intercepted or phished.
Two-Step Verification Grows Up
The bigger change is in two-step verification (2SV). Previously, WhatsApp locked your account behind a six-digit PIN. Simple, sure, but also predictable. Six digits offer only a million combinations — trivial for a determined attacker to brute-force.
That PIN is now being upgraded to a full password. You can make it longer, and it can include alphanumeric characters and special symbols. In other words, you can finally use something like Tr0ub4dor&3 instead of 123456.
This is a meaningful upgrade. A longer password with mixed characters exponentially increases the difficulty of guessing or cracking it. It also aligns WhatsApp with best practices that security professionals have been pushing for years.
One thing to note: this doesn’t replace your passkey. It’s an additional layer. If someone gets your phone, or you lose it, the 2SV password is still there as a backstop when you re-register your number.
Caller Context: A New Weapon Against Spam
The third feature is Android-only for now, and it’s aimed squarely at the scourge of spam calls.
When an Android user receives a call from someone not in their contacts, WhatsApp will now display additional information about the caller. You’ll see their country of origin and whether they share any WhatsApp groups with you. That’s a small detail that can tell you a lot before you pick up.
If a call comes from a random number in a different country, and you have no mutual groups, you know it’s probably not worth answering. But if you see that the caller is in a group with you — say, a neighborhood association or a work channel — it’s more likely to be legitimate.
“Scammers rely on urgency – now you can take a beat with some more info before answering,” WhatsApp said in its announcement.
That’s the right framing. Spam callers thrive on the moment of panic when the phone rings. A second of context can deflate that urgency entirely.
Building on Scam Alert
This update lands just a couple of weeks after WhatsApp rolled out WhatsApp Scam Alert, an optional feature that uses AI to flag suspicious messages from non-contacts. Together, the two features form a more coherent defense against social engineering.
Scam Alert works by analyzing incoming messages for patterns commonly used in scams — urgency, requests for money, suspicious links — and then warning you before you engage. Caller context extends that protection to voice calls.
It’s a sensible one-two punch. Messaging scams and voice scams often come from the same criminal networks. Blocking both channels makes the platform a harder target.
What This Means for Your Privacy
Some users might wonder whether caller context compromises privacy. Showing your country and mutual groups to a stranger who calls you — isn’t that a data leak?
Not quite. The information is shown only to the person receiving the call, and only when the caller is not in their contacts. It’s a one-way disclosure designed to help the recipient make an informed decision. Your phone number remains hidden unless you choose to reveal it.
WhatsApp has also been pushing WhatsApp username feature to bolster phone number privacy, so users can interact without exposing their digits at all. The two features complement each other: usernames hide your number, and caller context gives you more signal about who’s on the other end.
Security Beyond the Headlines
It’s worth remembering that WhatsApp’s security posture has had its ups and downs. Earlier this year, the company disclosed WhatsApp file spoofing and URL scheme vulnerabilities. Those were patched, but they serve as a reminder that no platform is bulletproof.
The new passkey and 2SV features are steps in the right direction, but they only work if you actually enable them. Passkeys are on by default in many cases, but the 2SV password — the upgrade from the old PIN — requires you to set it up.
Here’s what you should do right now:
- Open WhatsApp Settings and check your passkey registration. If you use multiple devices, register a passkey on each one.
- Update your two-step verification to a full password. Make it long, unique, and not reused anywhere else.
- Turn on Scam Alert if you haven’t already. It’s optional, but it’s free protection.
- If you’re on Android, pay attention to the new caller context screen. It could save you from a scam call.
Security is a process, not a product. WhatsApp’s latest update gives you better tools — but the final layer of protection is still you.