Create task task-049

backlog/tasks/task-049 - Implement-second-device-verification-for-CryptID.md

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+---
+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
+<!-- AC:BEGIN -->
+- [ ] #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 -->