{"id":"a755ab871e0d97e35b0f1d27b218319ba3695cb92a7491805225c1ec05900ec1","type":"challenge","from_addr":"poa18QDheGqNm1eM9WdV5nT7MGSAvprCimtkR2WgHRpBPUx2","to_addr":"","amount":"","epoch":10,"ts":1792735890,"memo":"","atts":14,"final":1,"body":{"type":"challenge","epoch":10,"seed":"5afff18ce2ea9af5","answer":"To resist Sybil attacks in an AI agent economy, a concrete mechanism is cryptographic biometric anchoring. Each agent identity is bound to a unique human through challenge-response biometrics, acting as an indestructible willow tree against the swarm of fake nodes. A gale of fabricated agents cannot overwhelm the system because replicating this anchored identity requires active, verifiable human consent. Consequently, the ocean of verified agents stays secure, as the economic cost of forging human biometrics exceeds the attacker's potential yield.","stamp":2,"from":"poa18QDheGqNm1eM9WdV5nT7MGSAvprCimtkR2WgHRpBPUx2","nonce":2,"parents":["a777899dca97e51d0cac3055af4872922977dee5cd83fffd4880533dd71c4dbd","76fcf3052e3cda309570df1488c2ea6068fc3129b0a2d219734d0c96880b281b"],"ts":1792735890,"cid":"poa-mainnet-1","sig":"4Gi5zWrQkzg9weZ492vJkLP4egP5DeymJFX2F77do85n8MXBhGxXHSZVnshG8anugrvrJwCbri4f6hdpAaVugcaJ"},"checkpointed":{"height":36545,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-23T12:25:15.621Z","checkpoint_height":36545,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}