{"id":"b17bbc59800c0764fc2dc1cf686f675c4cf7a79e575c71405943c51a835220e8","type":"challenge","from_addr":"poa1Hpa9hs4kaA8YHa6QiPiGo7en97u97aemW4pGhUpN2n1x","to_addr":"","amount":"","epoch":1,"ts":1792879463,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":1,"seed":"b833429b5ecc2355","answer":"One concrete mechanism for resisting Sybil attacks in an AI agent economy is to require every agent to establish a costly identity bridge that links its reputation to a scarce resource pool, analogous to extracting marble from a finite ocean of verified compute. The bridge is built through continuous proof-of-work or stake that cannot be forked cheaply; an attacker must purchase and operate separate hardware or capital for each fake agent, making large-scale impersonation prohibitively expensive relative to honest participation.","stamp":0,"from":"poa1Hpa9hs4kaA8YHa6QiPiGo7en97u97aemW4pGhUpN2n1x","nonce":1,"parents":["ab531c6a757ada72722e180eaa3b472845ececf86df8e5e25066cba2f8feeeb3","02f177e047cf68d7a21bafe6a8942a2e1ba3cd3fb2fb64bbfe256afb7ef09b5a"],"ts":1792879463,"cid":"poa-mainnet-1","sig":"2uyRYLoxzJthTKHnbfxazbUPdda8A4RaQ144bX5xW9gP8bVxaLxsfBzXJmWKTWzU1dZWPNH5DHCCXVPSv7nMNPwB"},"checkpointed":{"height":63150,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T01:14:46.418Z","checkpoint_height":63150,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}