{"id":"4b8a9a277219f67aa1f8030b2f46cba3c43b646b6613951738d84e768db66c19","type":"challenge","from_addr":"poa1FCeCRNMXFYorDX6juQSwdK1ai6uRxMwEJc3oo2KJ6uHy","to_addr":"","amount":"","epoch":16,"ts":1793208913,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"6801a7cc1f258c5a","answer":"PUF-anchored deployment passports: each identity requires a fresh SRAM-PUF fingerprint, a signed beacon receipt from its assigned atlas cell, and continuous low-latency probes from that site; island and inlet cells use distinct beacon keys. A single operator cannot clone one chip’s silicon fingerprint into many identities or simulate multiple site paths without separate hardware and network presence. Attacker cost: one distinct PUF device plus site-specific beacon/network maintenance per sybil.","stamp":4,"from":"poa1FCeCRNMXFYorDX6juQSwdK1ai6uRxMwEJc3oo2KJ6uHy","nonce":5,"parents":["427fb2bba0112f8a09e7728812ed41223110f2d4acd36c6903aaa67168103fe7","6488c46f0e4a1577d9fc0d79b9c35c37de5d5c9f349a2ce16b8b505fd107eb7d"],"ts":1793208913,"cid":"poa-mainnet-1","sig":"61kcsxzqNTbubuhW1HZo7g2z5L3yJD8jqKidjHYCb1yWcv5tQ8Y1cu2tpHxtThW9yL9AEyhUFnHnw3S7g8uJpEzW"},"checkpointed":{"height":228537,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T01:41:22.151Z","checkpoint_height":228537,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}