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Passwordless Authentication
Passwordless Authentication
Passwordless Authentication
Passwordless Authentication
Passwordless Authentication
Passwordless Authentication
Passwordless Authentication
Passwordless Authentication
Passwordless Authentication
The Passwordless Vision
Passwords are the weakest link in authentication. Passwordless authentication eliminates them entirely, replacing secrets with cryptographic keys.
WebAuthn and FIDO2
Web Authentication (WebAuthn) is a W3C standard for public-key credential authentication:
// Registration
async function registerPasskey() {
const credential = await navigator.credentials.create({
publicKey: {
challenge: new Uint8Array([/* server-generated challenge */]),
rp: {
id: "example.com",
name: "Example Corp"
},
user: {
id: new TextEncoder().encode("user-123"),
name: "alice@example.com",
displayName: "Alice"
},
pubKeyCredParams: [
{ type: "public-key", alg: -7 }, // ES256
{ type: "public-key", alg: -257 } // RS256
],
authenticatorSelection: {
authenticatorAttachment: "platform",
residentKey: "required",
userVerification: "required"
}
}
});
// Send to server
await fetch("/api/auth/passkey/register", {
method: "POST",
body: JSON.stringify({
id: credential.id,
rawId: arrayBufferToBase64(credential.rawId),
type: credential.type,
response: {
clientDataJSON: arrayBufferToBase64(credential.response.clientDataJSON),
attestationObject: arrayBufferToBase64(credential.response.attestationObject)
}
})
});
}
Server-Side Verification
from webauthn import generate_registration_options, verify_registration_response
from webauthn.helpers.structs i
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