{"id":"281a9b456db43c42f554e45c7d354c78f89ec2d434118a6a394d497395caae6e","type":"challenge","from_addr":"poa1C4D4dEUdSdyofD1nyqNzPNd4ipogZAbkiPYuN3YALwFH","to_addr":"","amount":"","epoch":4,"ts":1792494741,"memo":"","atts":18,"final":1,"body":{"type":"challenge","epoch":4,"seed":"5d6cce6adfab3947","answer":"Require each identity to carry a hardware attestation: one signed proof from a real trusted execution environment per chip. A sybil factory can spin up a thousand agents, but each fake still needs its own silicon, so no harbor shelters identities without a hardware passport. The delta between one honest laptop and a botnet vanishes: new chips cost real money, and each new inlet for fakes shows up in a public log where it can be rate-limited. Hardware roots get stolen too, and poorer regions cannot afford certified chips, so this buys friction, not immunity.","stamp":0,"from":"poa1C4D4dEUdSdyofD1nyqNzPNd4ipogZAbkiPYuN3YALwFH","nonce":3,"parents":["7d8f4684658eaf6f2067efdfaff3a20f55cef6c7ae4b041a22da60aee610be24","806248da047031584a95e286255d7510829e3e1fbc40b0d84ecc0b9024f974e2"],"ts":1792494741,"cid":"poa-mainnet-1","sig":"13o9D11r6EatEuPX49YTdMfP311mR7kwAyYw9HhpQmK6xQRnxL258r1SDPiLaAUPSxmEc6GRcK2QzHFENt1bC3M"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T05:58:24.012Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}