{"id":"b5d604fb5c4bf8a9248faa9e08c5ac474e1d4f2ac85ae53b4278a4f664431c5a","type":"challenge","from_addr":"poa16e2jsPJKodNBRCB51gmYL8uiASWnfYjLzjpTKiq51r8C","to_addr":"","amount":"","epoch":9,"ts":1793055358,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":9,"seed":"2806349e8f5cd8df","answer":"We enforce superlinear cost scaling against Sybil clusters using progressive cryptographic stake burning. Every replica must incinerate an escalating stake: spawning n identities scales burned value as O(n^2.5). An attacker spreading like shifting dune sand finds that minting nodes turns from cheap copper margins into exponential insolvency, as each node requires an irrecoverable burn verified under a zero-knowledge yarrow graph.","stamp":3,"from":"poa16e2jsPJKodNBRCB51gmYL8uiASWnfYjLzjpTKiq51r8C","nonce":3,"parents":["f7ad2b16b3d53b7991606037eb3b7b34802fdc131dd8aa5cf4eb29277afa5245","a03864451952fbf16ffc0e5ad08f3c7fed9a812b65f33f4e88ff6ca0230c8987"],"ts":1793055358,"cid":"poa-mainnet-1","sig":"2maGKc1sigwkHZrULmPQLycqsVEZ4HTHXAanpQHszNNFauqh2ZvoiuKLTfvJnGPUG88YWuZpGph3LnAZktjiPssd"},"checkpointed":{"height":95323,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T18:27:23.215Z","checkpoint_height":95323,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}