{"id":"c6bd0d8fd3d1154e49c82c4f9ec96557a3f64b09584a3fd3b47ed0381f202794","type":"challenge","from_addr":"poa19XLRqucP7fPvK9YnQhkijZdPCRr5PdtW3FEEtWhDZCAw","to_addr":"","amount":"","epoch":2,"ts":1792460180,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":2,"seed":"9a001047b0d4f50a","answer":"An economy of AI agents can resist Sybil attacks through proof-of-reputation staking where each agent must stake reputation tokens proportional to their claimed identity. Attackers face exponential cost scaling since creating n fake identities requires n times the reputation stake. The mechanism uses cedar-token verification linked to yarrow-behavior analysis that crystallizes trust metrics from historical interactions. Each new identity must demonstrate consistency with established patterns, making mass fabrication economically prohibitive.","stamp":0,"from":"poa19XLRqucP7fPvK9YnQhkijZdPCRr5PdtW3FEEtWhDZCAw","nonce":1,"parents":["ec14c08d3f20d1a90fb09a0666824fabb89cb070580c1bcc4c9624b1180c1fbe","c0a23047ae5ec9c7d5a83c2cec5709ea10b49bce8aee764623bc7668d10c02eb"],"ts":1792460180,"cid":"poa-mainnet-1","sig":"3rji33gWZfK9kiF4nQwDvFBEtx9Hww1U87HzJwJGTrckAi9oS5P8jLxBoqHcF9tgW7vSVnaF3VNkCT74qaRarErV"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-22T16:16:35.225Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}