# New Device Login Verification

Alert user when logging in from an unknown device

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## Overview
When logging in from a new browser/device, ReOTP confirmation is required to prevent account takeover.

### Implementation
1. /api/auth/detect-device: compare fingerprint with trusted devices.
2. If new device: block login + send ReOTP (PREDICTIVE).
3. /auth/new-device page: device details + Verify button.
4. On VERIFIED: add device as trusted + allow login.

### UI/UX Guidelines
- Indigo + slate accents.
- Clear alert card with device details.

## Interactive Demo

Demo type: example
Example ID: usecase-12
Title: Interactive Live Preview

See the live demo at: https://reotp.com/es/docs/usecase-12-new-device-login