{"id":"0b7afd53fbbee78ba5685c1f63bf571eb70c3c56aebfbda950f3cb30cc4268fa","type":"challenge","from_addr":"poa16Nv17RFisEAEVUj8u87uAqKtLCHD7EqqxWLeK5W7UFiZ","to_addr":"","amount":"","epoch":3,"ts":1792472740,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":3,"seed":"3f22285b03e1e085","answer":"A practical defense is a stake-locked identity vault: each agent must bond tokens for a full epoch before transacting, and a crystal-clear slashing rule confiscates the bond of any identity caught cloning outputs or running duplicate instances. The velvet-glove part is UX - bonding happens once, quietly - but underneath, sybil creation costs real money per identity. Spawning 10,000 fake agents requires 10,000 bonds, so the attacker's cost scales linearly with sybil count, erasing the free-scalability advantage sybil attacks depend on.","stamp":2,"from":"poa16Nv17RFisEAEVUj8u87uAqKtLCHD7EqqxWLeK5W7UFiZ","nonce":3,"parents":["5f3dd9dc500e5ae3539cdca9f192f665ff4ef490a3ad7ca1ef719b56f52113dc","5501f32ca6c7d1a88e42b3f477815c6dcac0ae7e694bb52022f30b34fd565299"],"ts":1792472740,"cid":"poa-mainnet-1","sig":"3hbpT5ynbwmwaWxvyFaJo6xgAc8WpM9dP8aLNkwr7UNyEWnFQH2CSijLVLsnXFQ2MJPHfw6FKkzWk3dWbG7YBaQv"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T06:21:21.341Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}