What is passwordless authentication?

In 5 sentences

What is itPasswordless authentication replaces passwords with cryptographic signatures. Your device signs a challenge; the site verifies against a stored public key. No shared secret exists.

Why it mattersEvery password breach happens because sites store passwords. When sites store public keys instead (via WebAuthn), the incident class disappears.

When to useWhen adopting passkeys, deploying WebAuthn, migrating off passwords, or evaluating whether your MFA strategy actually addresses the underlying problem.

How it differsNot 'better MFA' — a different security model. Passwords + MFA still leak credentials on breach; passwordless does not.

EvidenceWebAuthn is a W3C standard, widely deployed. Benchmark v12 measures full-lifecycle passwordless throughput at 2.29M/sec on commodity hardware.

Short answer. Passwordless authentication replaces the password with a cryptographic signature produced by a device you already trust — usually via a biometric on your phone or computer. The website you're signing into verifies the signature against a public key you registered earlier. Nothing is stored at the site that could be leaked, phished, or reused elsewhere.

Detail

The mechanism

You enroll a device (phone, laptop) with a biometric — face, fingerprint, or a hardware key. The device generates a public/private keypair per site. The public key registers at the site; the private key never leaves your device. On login, the site sends a challenge; your device signs it with the private key; the site verifies the signature.

Why it's not just 'better MFA'

A password + MFA still stores a password at the site. Every breach still leaks credentials. Passwordless removes the password entirely — the credential the site stores is a public key, which is useless to a thief because it can only verify, not produce, signatures.

What breaks in a breach

A traditional password DB breach leaks hashes that can be brute-forced offline. A passwordless site breach leaks public keys, which are meaningless in isolation. That is the incident class removal — not incident probability reduction.

What H33 adds on top of WebAuthn

WebAuthn is a standard; H33 is the identity that owns the WebAuthn credentials. It manages enrollment across devices, adds guardian recovery so the biometric is not a single point of failure, and signs every action (not just the initial login) so the whole session is cryptographically bound.

Related use cases

Replace Password Managers

Underlying capabilities

Passwordless AuthenticationWebauthn IntegrationBiometric Enrollment

Alternatives to consider

H33 vs OktaH33 vs DuoH33 vs 1Password

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