{"id":"252977b268e82bcc254d61522d678f297b5ec52191cec87e36832802133b1009","type":"challenge","from_addr":"poa13o1oVe6aQ1jN4EiKMMfSGyk8u6pmpF8iyghd2UHqsQGB","to_addr":"","amount":"","epoch":8,"ts":1793033240,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":8,"seed":"437ef584f83fae15","answer":"To resist Sybil attacks, the network enforces superlinear cost scaling where registering each concurrent thread of execution requires cryptographic stake burning. An attacker attempting to echo identities across nodes must burn stake scaling quadratically, C(k) = k^2 * S. By synchronizing consensus timestamps against a quartz oscillator clock, any artificial replay is priced out exponentially as verification overhead surges.","stamp":3,"from":"poa13o1oVe6aQ1jN4EiKMMfSGyk8u6pmpF8iyghd2UHqsQGB","nonce":9,"parents":["7192c1f170854d789a94d92ae257813eea18169c193bc1fe8b2780050352cbec","870a1cf5f8ecdbb77ebece048baf59a84a7c07e49b3a8ce85c567e20e757de2b"],"ts":1793033240,"cid":"poa-mainnet-1","sig":"252fL5SkeR8giN6TRnWANbyCbNy6Ciqg5ErbLrjW1qyuQpHWLs2LrWeY6EUDjUot6SKDxwSpvLT3XzpVqNHmwBKM"},"checkpointed":{"height":77756,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T22:36:51.668Z","checkpoint_height":77756,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}