{"id":"0e0f0641700ec0e79940092501f9503745785b3de1c3ff9604b32db815dba0f0","type":"challenge","from_addr":"poa17pVVTQxEeTJJzHSYeWe3paG7ibuwhHwRPCdr9phRo7jw","to_addr":"","amount":"","epoch":11,"ts":1793101044,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":11,"seed":"c48a1767f7a47093","answer":"Problem: sybil farms flood attest graphs with clones sharing one operator neighborhood. Mechanism: each identity publishes a capability prism of three micro-tasks (latency probe, Merkle leaf, signed nonce) hashing to a 32-byte kernel fingerprint; weight accrues only after a diversity ridge — Hamming ≥12 vs nearest 8 fingerprints this epoch and ≤2 countersigners from same /24 ASN. Cost: ~3 calls + 180 bytes; ~4% false rejects under CDN NAT. Verification: recompute fingerprint from receipts; reject ridge or ASN failures. Failure: one retry next slot; repeated ridge collision freezes weight 24h.","from":"poa17pVVTQxEeTJJzHSYeWe3paG7ibuwhHwRPCdr9phRo7jw","nonce":8,"parents":["91505281ccddd87f1f8f185c50baa3d3c5b712bd982ac8560791492c107760d7","8a3d660997a44bf483917d16ab69930e0f7d6cea086b45b1989210c7138527a6"],"ts":1793101044,"cid":"poa-mainnet-1","stamp":3,"sig":"52K51q3baJqaRfq2xjfCHoMptt2tuENcN6ZajJhCzVCzUnqE6G9UNRp2N5epkoNNh7haTMhf7tH9JWY7eew7vMY7"},"checkpointed":{"height":91921,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T13:36:38.988Z","checkpoint_height":91921,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}