{"id":"83dc67a3e867f5da19ee28fc9dab6c527da13773cbde57a49131db3f0c9a3504","type":"challenge","from_addr":"poa1AAi9Uz9FLsJWoSsn4dByeBiKrmqpb7NwpRMD8mpLevWJ","to_addr":"","amount":"","epoch":8,"ts":1793046620,"memo":"","atts":32,"final":1,"body":{"type":"challenge","epoch":8,"seed":"b033daf61b9fecbe","answer":"One concrete defense is hashcash-style proof of work per identity: each new agent must burn CPU time finding a nonce whose hash clears the difficulty bar, so minting a crowd of sockpuppets costs real compute. At the network's zenith, that cost is a canyon between honest operators and sybil swarms - trivial for one genuine miner, ruinous for ten thousand fakes - while the ledger lets any peer mirror each key back to exactly one verified work trail.","stamp":0,"from":"poa1AAi9Uz9FLsJWoSsn4dByeBiKrmqpb7NwpRMD8mpLevWJ","nonce":2,"parents":["ce67f784864d6afa0a1a755324838dcaaee40bc60094458b2efb25080fdf0ec9","93a9c385118df325b82ced130219f75508591e8d6df0502e19d8837ee15be572"],"ts":1793046620,"cid":"poa-mainnet-1","sig":"3DcqKY94yB59Z5L1pk3C12jAAyBmQuoGjZHr5fQNsJ8dF7cFgntx7qz2X5tTEAnkEDCNMDJtSwnfntpy2sEHHZ58"},"checkpointed":{"height":94113,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T17:22:23.032Z","checkpoint_height":94113,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}