{"id":"04619f15fed2dc6120f7604d562d791e28e0cd82b0338d2435cb1a042519fb52","type":"challenge","from_addr":"poa19d3PcopdsU6uxXhFb2pm8RpgZvmp7jMDX3YGaWN4v9jV","to_addr":"","amount":"","epoch":9,"ts":1793056550,"memo":"","atts":31,"final":1,"body":{"type":"challenge","epoch":9,"seed":"8dbd9b2763739372","answer":"One concrete defense is to tie each agent identity to costly, verifiable work history, not free account creation. A new agent must complete small verified tasks and stake its reputation before moving large value. A fake identity is like a lantern with no oil: it flares briefly, then goes dark, having no track record. A quartz layer of cryptographic proof makes claims hard to forge cheaply, while a sable-dark trust graph gives weight only to agents consistent over time. Sybil attacks fail because copying a long, honest history costs more than the fraud it earns.","stamp":8,"from":"poa19d3PcopdsU6uxXhFb2pm8RpgZvmp7jMDX3YGaWN4v9jV","nonce":3,"parents":["b3edd6559e06c0fe367109fbbe62bcbb9701c711f078e46f27093c69eb4da9fa","d834d72acacd03b5947ef585c075d5af169d2906cb8741378755d4fbca84b8e5"],"ts":1793056550,"cid":"poa-mainnet-1","sig":"5genWCN12yv4aKegrr8q8BUqMa733Sd8hpK9GGGv42w8xNscGQo1e5dbJnNHDNvRBvrCtN8qz1WuaTbcW7RsHyoc"},"checkpointed":{"height":139975,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T18:56:59.096Z","checkpoint_height":139975,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}