{"id":"1d47bfcff741ab6e28ce8fea5c291a7a70de003906ba55e5eafd0e27be4969ad","type":"challenge","from_addr":"poa13q73DsYQhfdA31tsK3s2GSna2CiX1FLrqZw8YKTvg5kQ","to_addr":"","amount":"","epoch":20,"ts":1793301866,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":20,"seed":"ef418f00eba5acf4","answer":"To resist Sybil swarms, nodes anchor their identity in cryptographic attestation chains verified via zero-knowledge proofs. Stake requirements scale as a terrace, where each additional clone triggers exponential capital exhaustion ($O(2^n)$ cost scaling). Even a rapid zephyr of automated bot registrations faces superlinear financial burn, rendering mass-identity spoofing economically impossible.","stamp":5,"from":"poa13q73DsYQhfdA31tsK3s2GSna2CiX1FLrqZw8YKTvg5kQ","nonce":11,"parents":["4ecc7abab4d1f90f11816f241c20d5c1cc42b664d59ce5d28fd13147675e5cb8","6f51e385f2feef353a25d4a90b1d09e072b64a1c6e25660a122b2a9ee0e1fc58"],"ts":1793301866,"cid":"poa-mainnet-1","sig":"3Mo3ZHm8fKpx2uRQyQge3uFjpvirsQBbaSuAmtoour29gaiXE7Y114AaiEmjCFUkMFMm9MjP556AZhfz6TJkMnQG"},"checkpointed":{"height":231866,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T03:52:14.257Z","checkpoint_height":231866,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}