What Is Passwordless Authentication?
Passwordless authentication verifies a user without a shared secret they have to remember. Instead of a password, the user proves identity with something they have (a device or security key) and something they are (a biometric) or know (a local PIN). Done well, it is both more secure and easier than passwords.
Why move off passwords
Passwords are the largest single source of breaches through reuse, phishing, credential stuffing, and password spraying. Removing the shared secret removes the thing attackers steal.
The passwordless spectrum
Not all passwordless is equal:
- Phishing-resistant: passkeys and FIDO2 security keys, bound to the origin and impossible to replay. The gold standard.
- Better than passwords but phishable: magic links and email or SMS one-time codes.
Aim for phishing-resistant MFA where it matters.
Practical considerations
Plan for enrollment and account recovery, the steps attackers target once passwords are gone. Support more than one authenticator per user, and have a tested fallback.
Where to start
Read Passkeys 101 and browse MFA and passwordless vendors.
Frequently asked questions
- What is passwordless authentication?
- Passwordless authentication does not rely on a password, instead using methods such as passkeys, biometrics, hardware security keys, or magic links.
- Are passkeys passwordless?
- Yes. Passkeys are a leading passwordless method based on the WebAuthn and FIDO2 standards, using public-key cryptography that resists phishing.
- Is passwordless more secure than passwords?
- Generally yes, because it removes shared secrets that can be phished, reused, or leaked, though the security depends on the specific method used.