# Pure Passwordless Identity System No password, no messages — just one biometric --- ## Overview Complete login experience with no password at all. Biometric only, with ReOTP as initial trust server. ### Implementation 1. /login with NO input fields: only biometric button. 2. If untrusted: call /api/verify/init (PREDICTIVE). 3. After VERIFIED: register biometric (WebAuthn) as trusted. 4. Within 30 days: biometric only. 5. New device: re-request ReOTP. ### UI/UX Guidelines - Purple + indigo accents. - Magical animations, Liquid Glass. ## Interactive Demo Demo type: example Example ID: usecase-10 Title: Interactive Live Preview See the live demo at: https://reotp.com/es/docs/usecase-10-pure-passwordless