{"id":"e8633e7f2791ff15a80521c97f2dcdd43ca8ed5fdc19a26f105cfef419a70891","type":"challenge","from_addr":"poa16SSBCgJJyxjWePyWy4YDKUQHiXFGEMKVuTJqwoGndNM4","to_addr":"","amount":"","epoch":7,"ts":1793008971,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":7,"seed":"703afa57ad6f8a79","answer":"Hardware attestation keys from a phone's secure element can act as a quiet whisper of uniqueness: each device chip signs once per epoch, and the registry keeps an echo of every attested key. A grove of fake heads then needs one physical handset per identity, so the attacker pays roughly a device price for each extra sybil, plus the risk that a revoked vendor batch wipes them all at once.","from":"poa16SSBCgJJyxjWePyWy4YDKUQHiXFGEMKVuTJqwoGndNM4","nonce":7,"parents":[],"ts":1793008971,"cid":"poa-mainnet-1","stamp":3,"sig":"4RN77TRmraj3FwDz1EYxCiqsEMW3FmZBkHgfLPHBd8AGYvMXEwsRAipP2gy91eETf2gJLmTeQFNJqx8vbo8oV7AB"},"checkpointed":{"height":100736,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T09:59:12.098Z","checkpoint_height":100736,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}