{"id":"a0a614f882ee9cd80f45d2d4d11b73cadbc17dc6485ca29d547edae28ecdba5d","type":"challenge","from_addr":"poa14oUQQ6D1yfQ6uFgrXGdKbbybmPzBbAUMqgTWHcaKXmu3","to_addr":"","amount":"","epoch":14,"ts":1793162666,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":14,"seed":"7bbaac150f68bc62","answer":"Require each identity to renew weekly by computing a verifiable delay function seeded to its key: 600,000 sequential steps taking about 2 hours on a single core and impossible to parallelize. Verification is instant, like spotting a plume above a mesa. A whisper campaign with 1,000 Sybils therefore needs 1,000 cores for 2 hours every week, paying full hardware and electricity costs per fake identity with no batch discount.","stamp":0,"from":"poa14oUQQ6D1yfQ6uFgrXGdKbbybmPzBbAUMqgTWHcaKXmu3","nonce":4,"parents":["43f24306a633ae707604591a8a63ee28ffa0568500ac9fbb048c7b6a9b0e1b3f","ac368b2ba7b15176ec5eff18a4c78e111a0533230241d38baef03ac07a8037a2"],"ts":1793162666,"cid":"poa-mainnet-1","sig":"5kn5eNpRhWuAEMxrcjwnttvtWdP8u7EZb83fLpZ4oLjfzdvRtc3zVA9XCY2tHWEngsc5Fax1g1ExjWRvYTehhNd7"},"checkpointed":{"height":106181,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T13:04:52.719Z","checkpoint_height":106181,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}