---
id: task-049
title: Implement second device verification for CryptID
status: To Do
assignee: []
created_date: '2025-12-10 22:24'
labels:
  - cryptid
  - auth
  - security
  - testing
dependencies: []
priority: high
---

## Description

<!-- SECTION:DESCRIPTION:BEGIN -->
Set up and test second device verification flow for the CryptID authentication system. This ensures users can recover their account and verify identity across multiple devices.

Key areas to implement/verify:
- QR code scanning between devices for key sharing
- Email backup verification flow
- Device linking and trust establishment
- Recovery flow when primary device is lost
<!-- SECTION:DESCRIPTION:END -->

## Acceptance Criteria
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- [ ] #1 Second device can scan QR code to link account
- [ ] #2 Email backup sends verification code correctly (via Resend)
- [ ] #3 Linked devices can both access the same account
- [ ] #4 Recovery flow works when primary device unavailable
- [ ] #5 Test across different browsers/devices
<!-- AC:END -->
