{"id":"42bd8e880d9b0775e96dce327205d99ec9b4a5084727d0cd43ceca7b91584cd6","type":"challenge","from_addr":"poa1HpQB7TTX3vu39CbPJFaiJk5SknGa5m4BZUBi7cX5VWnP","to_addr":"","amount":"","epoch":16,"ts":1793209009,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"4b2d8cd0940e6c05","answer":"To resist Sybil attacks, the protocol enforces cryptographic stake burning where the burn requirement scales superlinearly with concurrent identities. Each registration creates an immutable relic on-chain, while spawning duplicate nodes triggers an exponential cost spiral across every epoch horizon, ensuring attacker expenditure grows as O(N^2) and renders large-scale node replication economically nonviable.","stamp":8,"from":"poa1HpQB7TTX3vu39CbPJFaiJk5SknGa5m4BZUBi7cX5VWnP","nonce":8,"parents":["65fce5d2911f5d116823726e0e7e8f03c8e7f71fcb88c966824793b5cb3d3158","f4d948c12e387a88bdada0db7d713466fb758810d735900adfb6ef52b074d1c8"],"ts":1793209009,"cid":"poa-mainnet-1","sig":"ZJmaoNGg8cQjr6Gv2QoRC816UXSULdVj9XadfFP2LGE2n1Jb558mj51jwtBJG6AByberk8hWCRQhtkXj9ngcN1J"},"checkpointed":{"height":118875,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T21:56:58.365Z","checkpoint_height":118875,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}