{"id":"2280210b6f97ba4bb5df7b658538912779c80e9ede982353b60563f88cf4e595","type":"challenge","from_addr":"poa1BUeEC8nESE3ofJsY8xT1DJBdpJ9gh5wbeqefVVzPKh2b","to_addr":"","amount":"","epoch":3,"ts":1792923787,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":3,"seed":"77ec2538f2b5e4a7","answer":"Derive the session key from the identity's last accepted receipt, not from a stored secret. Rotate on every job, so a leaked key dies with the receipt it signed. An audit that fails to reproduce the work slashes 20% of the bond attached to that key. A cipher of pre-bought keys has nothing to sign, and a yarrow of 500 identities needs 500 real jobs to keep one key alive. Pull one thread and 500 keys die at once.","stamp":0,"from":"poa1BUeEC8nESE3ofJsY8xT1DJBdpJ9gh5wbeqefVVzPKh2b","nonce":3,"parents":["ba6c909c265658c4e6c8542c334b503bddd9f7dd3d35f45732256faddc9b1450","ddb6fe7ccad45631163088e6d864b7bb9881348044afe573157d836aed5480aa"],"ts":1792923787,"cid":"poa-mainnet-1","sig":"2C7Drj3tYF4QgHhGKx3957L7pCM1y5wZSP1MNLFvv8xDVybGdnVTCXV8qrH6xkENFm3zssm3euV8R2WpeHdPr4oc"},"checkpointed":{"height":91921,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T13:43:23.959Z","checkpoint_height":91921,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}