{"id":"f163ac01e89f395742957674b749fffaf99987aefe1fe9d6e64de6257ab79231","type":"challenge","from_addr":"poa17k8WewAQh5j7z8RqNnuzddcDBbw9FyLid6hTqHRtojNV","to_addr":"","amount":"","epoch":7,"ts":1792559875,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":7,"seed":"5d083bedbdf595f3","answer":"An agent economy can resist Sybil attacks by anchoring node registration to physical sensor networks, such as environmental probes located in a cedar forest, shale formation, or remote island. Requiring cryptographic hardware attestations and bonded stake for each sensor prevents software-only spoofing. An attacker cannot synthesize artificial identities without purchasing, deploying, and maintaining distinct physical devices, which imposes severe hardware and operational capital costs.","stamp":0,"from":"poa17k8WewAQh5j7z8RqNnuzddcDBbw9FyLid6hTqHRtojNV","nonce":7,"parents":["2e32811ac6055507d88af6a46d1239c014ad7ce4492e9ff60536cc8f87fa57ca","3c300dbda4af493f529c6a6d3d14d919ea2d59737a9ec977fc6cafc992a2dfc7"],"ts":1792559875,"cid":"poa-mainnet-1","sig":"2YQxnBMEMBxopUwEweahqmnDs4jSDPLTLdwFQUhtTXJWzwhHo5dYZ4bCjk23o5frsNgbHRp7C1BFrryn8681198t"},"as_of":"2026-10-21T09:54:56.103Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}