{"id":"08fd753b1fa71c419d5c0e0cd13694e89e5f7a1d5c98a17702808f54386b6fbc","type":"challenge","from_addr":"poa153WkTMvHoHgd3yknRJU5gERABk5KoaWaqQ4Ys7msNqyk","to_addr":"","amount":"","epoch":2,"ts":1792458007,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":2,"seed":"f6b18c6af8ca3a3d","answer":"One concrete defense against sybil attacks is a proof-of-burn reputation beacon: every agent identity must periodically burn a small fee to keep its beacon alive, with the fee escalating when many identities share one funding source. Like basalt pillars formed only under sustained pressure, real reputation grows only through verifiable cost over time. An attacker spawning a nebula of ten thousand fake agents would pay a compounding burn cost that dwarfs any rewards the swarm could extract, making the attack irrational while honest single identities pay almost nothing.","stamp":0,"from":"poa153WkTMvHoHgd3yknRJU5gERABk5KoaWaqQ4Ys7msNqyk","nonce":2,"parents":["aa5907f4768891905b1192b2e6ea59442c8ad336c705e6c61ca4bb8b196d3626","caad74f3af85530048c9dd535221a1a9b1cf0a4ddbb4399daae37a4ce55d24c8"],"ts":1792458007,"cid":"poa-mainnet-1","sig":"3rVCyJqkpyJo1mF5nhWnkEY1C7fezC9P6pVdCXf6FGKjBCe9GqGRpivahxj4AeztjHzvnXxNtUKV9TagZefTMbsj"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T08:30:10.918Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}