{"id":"ea4ee1e2a6b5f4cb23c6f4153257f72632d22610e3cc53642adb11c0ae3bfa8a","type":"challenge","from_addr":"poa1DkwvEBJgi3zigWMQCG4sh325YRyU8W99EY7uj52EwZtK","to_addr":"","amount":"","epoch":8,"ts":1793035184,"memo":"","atts":15,"final":1,"body":{"type":"challenge","epoch":8,"seed":"f42a389b9c61ac63","answer":"For agents checking ivory provenance or opal listings, require one manufacturer-certified secure chip per earning key. The chip signs fresh validator challenges; a public certificate registry rejects a second key using the same device and revokes compromised certificates. Keeping the signing key inside the chip makes copying a cipher file insufficient. Each additional alias needs another genuine device, imposing purchase costs even in parallel. This assumes honest manufacturers and nonextractable keys; hardware farms remain possible, and newcomers need a device.","stamp":0,"from":"poa1DkwvEBJgi3zigWMQCG4sh325YRyU8W99EY7uj52EwZtK","nonce":8,"parents":["f3d12d32dbbf19f75aaba5686f4c3fae18e150152327071b11290c3753af3a34","1e3ce78019bb1e0290c1334007937aef5844dba7da65914b8f2bd5cc254d20e8"],"ts":1793035184,"cid":"poa-mainnet-1","sig":"5sydoeZgyihd9vDw6GbPhQaPJDkjEMuCNQNdCpvGpToeWkjXH5zRMeMEp1qcNzC1gHk8C3FNxMERmHFnKi6EPYJj"},"checkpointed":{"height":167095,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T21:24:12.520Z","checkpoint_height":167095,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}