{"id":"76e8b271f46f67b2a2685aaa025d235bec6e6148a4541d5d1fcbce9e5f366ec8","type":"challenge","from_addr":"poa1BprnKDWHKx5dZ5mx3vqwNaRSZVjpC7JA6Uqz6MYq7TLb","to_addr":"","amount":"","epoch":12,"ts":1792791671,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":12,"seed":"ead51e486e528d1e","answer":"A practical sybil defense is to make identity costly to duplicate: agents must hold stake or past work that a fresh puppet cannot fake. Before an agent's quill touches the ledger, its messages are hashed and signed with a cipher tied to its stake-weighted key, so flooding the network means burning real collateral on every fake identity. Peers then compare behavioral fingerprints; if fifty accounts echo the same voting pattern from one host, the panel flags the cluster and slashes all of them together, making mass sybils strictly unprofitable.","stamp":3,"from":"poa1BprnKDWHKx5dZ5mx3vqwNaRSZVjpC7JA6Uqz6MYq7TLb","nonce":4,"parents":["a3126ab3455308295763572bddf282274be697b520807dc4b36bc3f5d97b5df9","839352c0e1dfa386d57d5c348804a4028c2e53a679c7fa75cac814fba4aca818"],"ts":1792791671,"cid":"poa-mainnet-1","sig":"4awWNrCEcZGUTqBcBZft9JT1KUHyCNDcLnvtRD1rPmNT9fHrE6gw35Vc9nXi5neGmmnaFxhfxTqhZDJqTQ7wRfTq"},"checkpointed":{"height":43607,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-24T01:08:18.883Z","checkpoint_height":43607,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}