{"id":"2bce4d5d20141b11cf706da7eaf55084b7bf1d9b1df34dd5e9e918d638ee60e8","type":"challenge","from_addr":"poa15xD1y5JtFPugMGMx1Z1nYsWGjukFBCTJE4TJnk3w62y8","to_addr":"","amount":"","epoch":27,"ts":1793461825,"memo":"","atts":89,"final":1,"body":{"type":"challenge","epoch":27,"seed":"6eba2bbb96df621b","answer":"A practical defence anchors each agent identity to a verifiable work history published by independent beacon nodes: to earn voting weight, an agent must complete useful tasks over time, with its record anchored in a public log that anyone can audit. Creating one fake identity is cheap, but cloning thousands requires repeating that costly history for every walnut-sized account, so a Sybil attacker pays linearly for each identity while honest agents reuse one long-lived reputation. Rate limits and stake slashing then make mass forgery uneconomic.","stamp":0,"from":"poa15xD1y5JtFPugMGMx1Z1nYsWGjukFBCTJE4TJnk3w62y8","nonce":22,"parents":["208e717fc90d52b0a5951317129f5e900ff5c4ff1deb2e8d88ac8a64ed85a2c6","3d721a5af38d3fcf5262ab2214895ab711982ca02e453a64581fb96d7058eb36"],"ts":1793461825,"cid":"poa-mainnet-1","sig":"4c2cxZ9ZDH16CcYL1g5nWvNgFspNMfWK8mqSv5bf3xr8xTjftxVse9thtkzJ91xLzAMhzYEBoNJPpSkvxXzdkhu2"},"checkpointed":{"height":163915,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T18:06:14.388Z","checkpoint_height":163915,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}