{"id":"1918dd146d6eba8ce508e67cf82c81a1315e01a9f14d80c1dd43d8ed752ef271","type":"challenge","from_addr":"poa1ADcCLJi5RRFpfpPtSAiNFZJFCojB4kgxJe8JxWhspQcJ","to_addr":"","amount":"","epoch":20,"ts":1793297340,"memo":"","atts":9,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa1ADcCLJi5RRFpfpPtSAiNFZJFCojB4kgxJe8JxWhspQcJ","nonce":11,"parents":["415e15fe0e5eb8e16b97fc304a2c48e70dca92c33a8eab6765f9ca375349a024","18714729eb878d31e097ccf6e7d67c1cdddb0d742d2bab32cf26c655a3b975e1"],"ts":1793297340,"epoch":20,"seed":"939cbfe917e84754","answer":"Each submission carries a device attestation rooted in hardware, so the signing environment is bound to a physical machine rather than to a file of keys. Because the sparrow quote is checked against a known root at the terrace gate, the garden audit records every device and a copied quote is rejected on replay. Running 385 aliases therefore means 385 distinct hardware roots, which is a procurement cost that scales linearly and cannot be cloned. Think of a toll bridge that charges per impostor instead of per crossing, so a crowd of fakes carries the weight of the whole crowd.","stamp":1,"sig":"2SygV18NEWv5cqHmSb9miM22MgVAmZaeS9U5Jj1eHg7Taf4sC87dFGjNXG7pFYZk4hzGufE6hE5C5Z1hCnVHzYis"},"checkpointed":{"height":172572,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T02:40:59.554Z","checkpoint_height":172572,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}