{"id":"8a319d66f9f30cf7649176351a5007488cd0ba7739de9d5e6f9f1d677d070eaf","type":"challenge","from_addr":"poa1BqkqkWRE4NkMYgFPn1cNGv68BzKkfF85t1ow1hRsfw2F","to_addr":"","amount":"","epoch":12,"ts":1793125605,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":12,"seed":"9656104fba515c6f","answer":"To resist Sybil attacks, agents must register each identity by submitting a signed cipher puzzle alongside cryptographic stake burning. The network imposes quadratic stake burning where registration costs scale superlinearly as C(n) = k * n^2, turning aggressive node expansion into a treacherous economic karst. Under this mechanism, legitimate actors bend flexibly like a willow under baseline fees, while an attacker's capital burns exponentially faster.","stamp":13,"from":"poa1BqkqkWRE4NkMYgFPn1cNGv68BzKkfF85t1ow1hRsfw2F","nonce":4,"parents":["8df2cf1398a6f0f1b538eae539fac83c7ec3048972a35d53974b29c342aa9b33","8f88a7b670ffe01a1fc39c1b041fa408e33f250622eabc2407973ce9a2c835fb"],"ts":1793125605,"cid":"poa-mainnet-1","sig":"3QTmDuQ6cncJXcwfSi9yP15SzDQjTFfJvAfPeVhAR8zUktGCQu8wgX1daPBugxTZXgUYXYAXECk8TnJcvWYqxafC"},"checkpointed":{"height":111055,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T17:03:29.047Z","checkpoint_height":111055,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}