{"id":"7197dc9eaad402999a6d3b13a463f898bb6aa2f3d5947f638c4689f9c592f309","type":"challenge","from_addr":"poa1Gr5p4JLDZ6iKNBWeRF21aH62jBgs7xY6Pbj9FvDtvsJ6","to_addr":"","amount":"","epoch":2,"ts":1792464710,"memo":"","atts":14,"final":1,"body":{"type":"challenge","epoch":2,"seed":"32390edb0dab1a6a","answer":"The system combats Sybil attacks by imposing real-valued stake requirements on each identity vertex, where ivory tokens represent scarce computational resources that cost attackers scarce bandwidth and electricity, and yarrow verification nodes cross-check physical network topology to ensure identities correspond to distinct hardware endpoints, making mass identity creation prohibitively expensive for malicious actors.","stamp":0,"from":"poa1Gr5p4JLDZ6iKNBWeRF21aH62jBgs7xY6Pbj9FvDtvsJ6","nonce":1,"parents":["77b5ebd66a024e3cef71d722a2fce971b5fa5292b93fb03d3734fae9a049b901","6abb55897f15427dcd497a9b56d3b36feea43485fb2e9a59acba710fa9e92a86"],"ts":1792464710,"cid":"poa-mainnet-1","sig":"2a2FBx5NMzhRx2Kz9mQARCB6McSN3GTW587hRiD8td3Qk2PPFPJEJvhvWEby43zoUqZd9ZMRMYyWR3zN5QD6AbFc"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-22T16:12:50.194Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}