Are Passkeys Really “Phishing-Proof?”

Introduction

Phishing attacks usually work because cybercriminals convince you to hand over something they need.

Maybe you type your password into a fake login page. Perhaps you receive a text message with a security code and unknowingly give that code to a scammer.

Passkeys change that process entirely.

Instead of relying on information that you know and can accidentally share, passkeys use technology tied to your device and the legitimate website you’re visiting.

Many people therefore consider passkeys “phishing-resistant” or even “phishing-proof.”

What Is a Passkey?

A passkey replaces your traditional password with a pair of cryptographic keys. One key stays securely stored on your device, while the website or app keeps the other. When you log in, the two work together to prove that you really have permission to access that account.

You usually unlock your passkey with something familiar, such as your fingerprint, facial recognition, or device PIN. Because of that, you never have to remember, type or send an actual passkey.

In essence, scammers can’t convince you to type or hand over a passkey the same way they could with a password. A fake login page can’t fool a passkey.

Why Doesn’t Phishing Work?

Imagine you receive an email that looks exactly like a legitimate message from your bank.

You click the link, and the website looks perfect. The logo is correct. The colors match. Even the login screen appears legitimate.

With a password, you might enter your credentials before realizing that you’re on a fake website. The attacker now has your password.

Passkeys work differently.

A passkey is created for a specific legitimate website or app. Your device checks the website before authentication occurs. If a scammer creates a convincing copy at a different web address, your passkey simply will not authenticate you there.

The attacker cannot trick you into handing over a credential that you never actually see.

What About Multi-Factor Authentication?

Traditional multi-factor authentication (MFA) adds another step after your password, which makes your account much safer.

Unfortunately, phishers can still outsmart some forms of MFA.

An attacker may create a fake login page that collects your password and then immediately asks for the six-digit code sent to your phone. If you provide both, the attacker may quickly use them to access the real website.

Passkeys remove that opportunity. You don’t have any passwords or authentication codes to reveal to a bad actor.

That does not make every other form of MFA useless. Any MFA is generally better than relying on a password alone. Passkeys simply provide stronger protection against the phishing techniques we see today.

Passkeys Are Becoming More Common

You may already have encountered passkeys without realizing it.

Google, Apple, and Microsoft all support passkeys, along with a growing number of other websites and applications.

The change is happening for a simple reason: Passwords have become a major security weakness.

We forget them, reuse them…and sometimes, accidentally give them to scammers. Passkeys inherently solve a lot of these problems.

What Should You Do?

If your workplace or an important personal account lets you create a passkey, consider setting one up.

A few other habits still matter:

• Protect your phone and computer with a strong PIN or biometric lock.

• Keep your devices updated.

• Never approve security prompts you did not initiate.

• Follow your organization’s instructions when setting up work passkeys.

Passkeys make phishing much harder, but good cyber hygiene still matters.

Conclusion

You cannot accidentally type your passkey into a fake website, because there’s nothing for you to type. In this case, your device handles the authentication and verifies that you’re communicating with the correct website.

That makes passkeys one of the strongest defenses we currently have against phishing. Sometimes the best way to stop people from stealing your password is to stop having a password for them to steal.

Cybercriminals have spent years perfecting ways to trick us into giving away passwords and authentication codes. Passkeys change all the rules to better protect our accounts and private data.