When a website offers passkeys, two-factor authentication, an authenticator app, and text-message codes, it is easy to feel as if you need a cybersecurity degree just to log in.
The short answer: use a passkey when the service supports it and you understand its recovery options. If you still sign in with a password, enable multifactor authentication (MFA). The strongest available option is not always the same on every website.
What is two-factor authentication?
Two-factor authentication (2FA) adds a second check after your password. It might ask for a code from an authenticator app, a hardware security key, or a text message. That extra step can stop someone who has stolen only your password.
Not all second factors resist phishing equally well. A scammer can sometimes trick you into typing a one-time code into a fake website, or convince you to approve a sign-in request.
What is a passkey?
A passkey lets you sign in using cryptographic credentials stored on a device or in a compatible password manager. You typically unlock the credential using your device’s PIN, fingerprint, or face recognition. The website does not receive your fingerprint.
Passkeys are designed to be tied to the real website, which makes them resistant to common lookalike-site phishing attacks. Some passkeys synchronize between your devices, while hardware security keys keep credentials on a separate physical device.
Which option should you choose?
If passkeys are available: They are often a strong, convenient choice, provided you have a reliable way to recover access if your device is lost.
If you use a password: Enable MFA. An authenticator app is generally preferable to relying only on SMS when more secure options are available. A hardware security key can be especially useful for your main email account or another high-value account.
If only SMS codes are offered: Use them rather than leaving the account protected by a password alone. Be aware that text messages can be vulnerable to phone-number takeover and social engineering.
A sensible setup order
- Secure the email account you use for password resets.
- Turn on a passkey or the strongest MFA method that account supports.
- Save recovery codes somewhere secure and separate from your main device.
- Check recovery phone numbers and backup email addresses.
- Repeat for banking, cloud storage, and social accounts.
What if you lose your phone?
Your recovery options depend on the service and how the passkey or authenticator was stored. A synced passkey may be available on another trusted device; a device-bound credential may not be. Recovery codes or a spare security key can prevent a lockout.
Check those options before changing your sign-in method. Never assume every provider offers the same recovery process.
Quick takeaway
Passkeys can protect against many phishing attacks that defeat ordinary passwords and one-time codes. MFA still matters for accounts that use passwords. The best practical setup is strong authentication plus a recovery plan you have actually checked.
Sources and further reading
- NIST: Guidance on syncable authenticators and passkeys
- CISA: Turn on MFA
- FTC: Protect your personal information