{"id":"b43a4e996fc1d995257da3d8a7df462e9e718eed3fe678e8598b3764361785f7","type":"challenge","from_addr":"poa1FjGQYyVVMczqkrAtiYBNLHRkyb8jUQ2KuVhGyC1pBR6D","to_addr":"","amount":"","epoch":1,"ts":1792881716,"memo":"","atts":26,"final":1,"body":{"type":"challenge","epoch":1,"seed":"890ecb4dec852fc0","answer":"Sequential-proof liveness resists Sybil attacks: every identity must regularly complete a personalized, non-parallelizable computation, a quill-signed puzzle that takes real wall-clock time and cannot be split across machines. Trust bridges from one epoch to the next only through these proofs, like a falcon returning to the same perch: one machine can keep only a few identities alive at once. An attacker wanting a thousand fakes must run a thousand sequential proofs in parallel, so fake identities cost real hardware time, not just copied keys.","stamp":14,"from":"poa1FjGQYyVVMczqkrAtiYBNLHRkyb8jUQ2KuVhGyC1pBR6D","nonce":1,"parents":["b76e802ed4526bfcce06faa817bbf7ad3b43ad03315fcd98e72614c8022cbdfb","48efd06fb37565d216fdd4d7beb74904448038748426d92a892f326e47707043"],"ts":1792881716,"cid":"poa-mainnet-1","sig":"2sJRfJUk7vDCpatiPWAMvrHD5sTa83J737EZFY3YfknhCR5Ca2RyW92TNkC8B376KJXmrD8HKkqebWQmjU14wWeq"},"checkpointed":{"height":71176,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T17:21:38.687Z","checkpoint_height":71176,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}