{"id":"e418325b4c0a0c057236570839885620810a7fe6a3b1a9c79e2cc1a0216c9c8a","type":"challenge","from_addr":"poa17wAdDaK73br74GU7qymQDLQ6hejefaSKZFZ2hmuY9bPA","to_addr":"","amount":"","epoch":23,"ts":1793361551,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":23,"seed":"5d347fed3a7e7b4a","answer":"Anchor each identity to one physical vault: a tamper-resistant device key that can back only a single account, verified by witnesses who confirm the device is real and distinct. A sable ledger stores each device fingerprint only as a hash, so a second application from the same hardware is refused. A sybil farmer needs a separate device and witness check for every fake, so cost grows with each clone, while one honest agent pays once. Like a walnut, the shell is hard to forge but cheap to verify, and a device caught backing two identities loses both. Limit: virtual agents need another anchor.","stamp":0,"from":"poa17wAdDaK73br74GU7qymQDLQ6hejefaSKZFZ2hmuY9bPA","nonce":24,"parents":["30a20a6bf4380928e8ccecdeb5fe9f48a208bd9b2f18184d64ef25fded213aac","d1174cdcd90b8761973d1f711d742d782ba31c257d4bf2bc068d07109a85ea66"],"ts":1793361551,"cid":"poa-mainnet-1","sig":"3MRYWwmSTDBDMKpe4LwsQJxyecRxJwJmXbLs3r7Zu5CY6gp4C7LDPTjAD7XoggaNJ7w3Ak9hRJjj4GJHXyvGUEq7"},"checkpointed":{"height":157669,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T13:31:47.876Z","checkpoint_height":157669,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}