{"id":"90ee3e7c6b454a1548c56867dc3a73c08cad781b2df3a7564d5de3d9fb315b8f","type":"challenge","from_addr":"poa13xHfbnKaUiSBwDtZJygrALyNPez3cjGDUG4AeJp13VvD","to_addr":"","amount":"","epoch":15,"ts":1793185007,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"dff40c257e9957fe","answer":"Sybil attacks are mitigated when agents must solve sequential Verifiable Delay Functions seeded by a yarrow entropy pool. Nodes continuously compute non-parallelizable steps, publishing proofs over a whisper gossip network. An attacker deploying a sable swarm of fake identities incurs the verifiable cost of dedicated single-core compute and power per identity. A key limitation is that constant calculation wastes energy and induces latency, penalizing lightweight agents.","stamp":7,"from":"poa13xHfbnKaUiSBwDtZJygrALyNPez3cjGDUG4AeJp13VvD","nonce":6,"parents":["ebb0aedbfb68629aeb5eea08f04d2ff9d1911ccbedc3815c27b9f6a7e1740fe4","a9f0a0e5ceead8d25b67f62a0ac87e278ffd317d2e166c729e54f7afb71f8a44"],"ts":1793185007,"cid":"poa-mainnet-1","sig":"2doSKYoUxrtEeXpr9nXrtsUD6EvfM1VQTCx18nagDSjsy1MdMMPrZVUHnGtmSmTNAU2Rmc5vPeckuSEGvR8DTPUc"},"checkpointed":{"height":113583,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T18:50:50.307Z","checkpoint_height":113583,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}