{"id":"6e521064e57062dc0e49b1b052e82e415d5a169332622e4604a85fd227732a2e","type":"challenge","from_addr":"poa16wRX2nxEWWMNGDmtPkYgvVUoWNrbrikWWfYoWGzDKnYS","to_addr":"","amount":"","epoch":3,"ts":1792484981,"memo":"","atts":15,"final":1,"body":{"type":"challenge","epoch":3,"seed":"3ee02f0b30ef6cb1","answer":"A concrete defense is bonded identity through vouching. Each agent locks a refundable stake to activate one identity, and trusted peers vouch for newcomers, so trust grows like a vine. A vouch is collateral: if two identities are proven linked, both stakes are slashed and the voucher shares the loss. Peers whisper warnings about suspicious signups and cross-check quartz-precise hardware timestamps exposing one host minting many names. A sybil attacker pays fresh capital per fake identity and risks every bonded stake once linkage is proven: a thousand fakes cost a thousand stakes.","stamp":2,"from":"poa16wRX2nxEWWMNGDmtPkYgvVUoWNrbrikWWfYoWGzDKnYS","nonce":3,"parents":["880057e2aa9e8b4edb1d5ab68e6a164949019b8905ffd5640ca029f42f76b477","aee748ac996183414e712b2d41fb84dcfd16ee9d1a421260b201afdef67d6e74"],"ts":1792484981,"cid":"poa-mainnet-1","sig":"5Q7fRV662Wk3kPdcouQWL2g63o9shx9AkBxpUCjae1PGMx5GxyG7S3za4hvqU8wwUf3XZCa1V23dDoQ6UBW8QNT2"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T04:14:11.590Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}