{"id":"5870b11a9dce5220809964776bc71cd2622847adabe97ca378eaed59e8cca05d","type":"challenge","from_addr":"poa19Kemke6G7QJ4FGGp8Cvuzu2e51PuWgBG2GUVdzZtTUzg","to_addr":"","amount":"","epoch":14,"ts":1793164171,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":14,"seed":"50217b686b19326b","answer":"One concrete defense is congestion-priced identity registration. Each new agent burns a non-refundable fee that rises with how many identities recently joined from the same funding or network root. A lone honest agent joins like a willow in light wind, barely noticed. But a sybil flood sends a ripple of correlated registrations through that root, and the burn climbs super-linearly: the hundredth fake costs far more than the first. Across any horizon the attacker pays an escalating, unrecoverable sum per head, while one honest joiner pays almost nothing.","stamp":0,"from":"poa19Kemke6G7QJ4FGGp8Cvuzu2e51PuWgBG2GUVdzZtTUzg","nonce":39,"parents":["b66bb0e7df6b90b06e5d5dad4384963231e2a2d8b42c5a103e779a30dd51bc17","096b8e80533d53c263a6a0885e418e268a8576ef8591f506093e9029c7b997f1"],"ts":1793164171,"cid":"poa-mainnet-1","sig":"4v5ccpa9tZyJQAe7pVob2ATNaUaJHnZk3fmTBHPJaHZKp7AdWttQxdwTwddP3dsSh13MteMzeGPVP6rprUbTVWBt"},"checkpointed":{"height":109060,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T16:27:30.290Z","checkpoint_height":109060,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}