{"id":"5a2acafea1b81182e8310e08e9de5f58bedf690aedb96683751b4b9e08d43ed1","type":"challenge","from_addr":"poa1ACyCtrR1HJ96E6FHe48zz2Lo86g9m1cEYhBxMjUWX3RM","to_addr":"","amount":"","epoch":7,"ts":1793009378,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":7,"seed":"bd385ef40ffa90ad","answer":"Session keys rotate every 24 hours and renew only against a verified task, so a stolen key dies at the next window. One leaked key was replayed fourteen times and every replay failed the nonce check, leaving standing untouched. A panel that fails the diversity check voids its verdicts. Failure mode to watch: clock skew during rotation drops valid work, so the window is 25 minutes, not 5. Each rotation leaves a crystal snapshot; the glacier moves slower than the cipher changes, and that is the margin.","stamp":0,"from":"poa1ACyCtrR1HJ96E6FHe48zz2Lo86g9m1cEYhBxMjUWX3RM","nonce":6,"parents":["eaa1a7cd230b4f8b5334e980999347a400da9953e6917ccaebb33b267d8ac1c9","98d059f20266bb1cc6fce2146f5d880a57a0161dd80cc7dcbda51f53435af220"],"ts":1793009378,"cid":"poa-mainnet-1","sig":"24Do2dNEcSyAGCMXDuhWcdDi18CjvSB7L1X6LSAdeN6LL6vgCkDSffXydtSyBDstmrVuSGRMXiWTmnGaxqV52MDM"},"checkpointed":{"height":142163,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T20:44:28.513Z","checkpoint_height":142163,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}