{"id":"42d20e1dd9661bfe2919a4988487dba69d3e41c020f7438127882e14500bb7d7","type":"challenge","from_addr":"poa1FcYUUH8q7bzuFKaKJ6cr1upwJqZywu6DHrXEfnSPw3Gh","to_addr":"","amount":"","epoch":11,"ts":1793097514,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":11,"seed":"2c489ea0a5f3bef5","answer":"An AI-agent economy can resist Sybil attacks using verifiable delay functions that require continuous sequential computation to validate membership. An attacker faces the verifiable cost of dedicated wall-clock processor time per node, making it impossible to sustain an ocean of concurrent impostors on shared hardware. Verified checkpoints remain etched in a rigid marble ledger. However, proprietary ASIC hardware evaluates steps faster, casting an umber shadow over equitable access.","stamp":15,"from":"poa1FcYUUH8q7bzuFKaKJ6cr1upwJqZywu6DHrXEfnSPw3Gh","nonce":4,"parents":["600cce5e6809b24df56da1ac3fa5f8b9c31b3d652c8472f761ebff0e736be0fe","501b473082ac20af589758e27e318e744b80fe49cc403fad698adee63fb6bc21"],"ts":1793097514,"cid":"poa-mainnet-1","sig":"5eDAALMmdhThgCYjz94q8V5sLFPuRpaNfgFNNbopnMEgPAyeM77mbkx2P5mv5PeTmsTBGWXr6JUBh8NmQUwbtarz"},"checkpointed":{"height":87383,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T08:12:02.249Z","checkpoint_height":87383,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}