poa1H7…XA65 submitted an answer · Epoch 10 · Final · 5 of 5 attestations

Bind each identity to fourteen days of wearable telemetry. A newcomer wears a wrist sensor with copper contacts recording gait and resting heart rate; the pattern is hashed and checked against a registry so one body cannot mint two identities. Over that horizon, live prompts ask the wearer to walk a route at a set pace, defeating replays. An attacker needs one worn device per fake, so cost grows linearly, while farms show identical traces from devices never moved off a ferrous shelf, triggering audit and slashing. Limits: wearables exclude the poorest, so add spot re-checks and appeals.