PLAYGROUND · interactive demo candidate
Two-Factor Authentication · QR Enrollment
Source name: two way factor authentication scan QRCode
A QR-enrollment demo for a second authentication factor, with attention to one-time challenges, expiry, replay, recovery, and explicit session boundaries.

Evidence
- Owner-recorded demo
- Demo and repository links pending
- Synthetic accounts only
Trade-off
A second factor raises assurance but adds enrollment, recovery, clock, and support failure modes.
Limitation
The public threat model, recovery path, and replay tests remain pending.
References
[DEMO3] · [REPO8] · real links pending