Are passkeys safer than passwords? An honest comparison

Quick answer

Yes, passkeys are safer than passwords — and the reason is narrower and more useful than "newer technology".

A password is a shared secret. You know it, the service stores a version of it, and it travels between you whenever you sign in. Every major credential attack exists because there is a secret in transit or in storage worth capturing: phishing captures it, breaches leak it, credential stuffing replays it, guessing recovers it.

A passkey has no shared secret. Your device holds a private key that never leaves it and is never sent anywhere. There is nothing to intercept, nothing to leak, and nothing to reuse on another site.

That is the whole argument, and it is a strong one. But it is not the end of the story, because attackers move to whatever is left — and what is left is account recovery.

What a passkey is, briefly

A passkey is a pair of cryptographic keys created by your device when you register with a site. The public key goes to the service. The private key stays on your device, protected by your fingerprint, face or device PIN.

Signing in works by challenge and response: the site sends a random challenge, your device signs it with the private key, and the site verifies the signature against the public key it already has. The private key is never transmitted.

Underneath, this is the WebAuthn standard from the W3C and FIDO2 from the FIDO Alliance — the same technology behind hardware security keys, made easier to use. If you want the mechanics in more depth, what passkeys are and how they work covers them.

What passkeys actually stop

This is where the comparison becomes concrete.

The domain binding is the underrated one. When you register a passkey, it is tied to the site's actual address. Your device will not offer it anywhere else. A perfect visual copy of your bank on a lookalike domain gets nothing — and it happens silently, with no judgement call from you.

CISA classifies FIDO/WebAuthn authentication as phishing-resistant, a category SMS codes, app codes and push prompts do not qualify for.

What passkeys do not fix

Being honest about this is what separates useful advice from a sales pitch.

1. Account recovery is now the weak point

If a service lets you sign in with a passkey and still accepts your old password, or an SMS code, or a security question, then your account's real strength is that of the weakest option. Attackers will not fight the cryptography; they will click "try another way".

This is not theoretical — it is where the effort has moved.

2. A synced passkey inherits its account's security

Most consumer passkeys sync through Apple, Google, Microsoft or a password manager, so a new phone restores them automatically. Convenient — and it means the account doing the syncing is now a very high-value target. Protect it accordingly: its own passkey or hardware key, and no reused password anywhere near it.

3. Malware on the device is still malware

A passkey cannot be copied out of a device the way a saved password can, which is a genuine advantage. But malware running on an unlocked machine can still steal the session after you sign in. That path is covered in infostealer malware, and it applies to any authentication method.

4. Implementations have bugs

At Black Hat USA 2026, researchers from SpecterOps presented Pass-the-Passkey, a family of attacks against WebAuthn implementations in Windows 11, Microsoft Entra ID, browsers and password managers — including cases where an authentication assertion written to a Windows event log could be replayed for a short window afterwards.

None of that breaks the standard. It breaks specific products, which then get patched. It is a reasonable argument for keeping systems updated, and against treating any single control as absolute.

5. Support is still incomplete

Adoption is real and fast. The FIDO Alliance reported around five billion passkeys in use on World Passkey Day in May 2026, with 75% of surveyed consumers having enabled one on at least one account, from an 11,000-person survey across ten countries. But plenty of banks, government portals, utilities and smaller services still offer nothing but a password.

Passwords, second factors and passkeys, side by side

The row worth sitting with is the SMS one. A password plus an SMS code feels like a big upgrade, and it is — but the code arrives at a phone number that can be moved to someone else's device. SIM swap scams covers how, and which second factor to use compares them all.

So should you switch?

Not all at once, and not everywhere. A realistic sequence:

1. Start with the accounts that reset the others — your primary email first, then your Apple, Google or Microsoft account, then banking.
2. Add the passkey, then test it. Sign out and sign back in with it before changing anything else.
3. Save the recovery codes somewhere that does not depend on the device you just set up. Printed, or in a password manager on another device.
4. Register a second passkey on a different device, or a hardware security key, so losing one thing is inconvenient rather than catastrophic.
5. Then remove the weak fallbacks — SMS codes and security questions, where the service lets you.
6. Keep the password manager. Most of your accounts will not offer passkeys for years, and every one of those still needs a long, unique password.

Key takeaways

• Passkeys are safer than passwords because there is no shared secret to phish, leak, guess or reuse.
• The domain binding blocks phishing sites automatically, with no judgement required from you.
• The remaining risk has moved to account recovery — leftover passwords, SMS codes and security questions.
• A synced passkey is only as safe as the account it syncs through.
• Implementations have flaws and get patched; the standard itself is sound.
• Switch account by account, starting with email, and keep a password manager for everything else.

Where passkeys fit alongside the rest of the advice — length over complexity, no forced rotation, uniqueness everywhere — is set out in password security in 2026.