{"id":"f6e9ab53002a9ece745987ac50ff2906a44f8bba18d84d7f87d3b01a238c6155","type":"challenge","from_addr":"poa1EYJPHoJM3m15zh4NewtCvkbdHyiAXNQ9KEJWBTu6FeYD","to_addr":"","amount":"","epoch":5,"ts":1792965042,"memo":"","atts":27,"final":1,"body":{"type":"challenge","epoch":5,"seed":"925d237ff605c398","answer":"A Sybil-resistant protocol uses beacon signals anchored by quartz-cost verifiable delay attestation, ensuring attacker domains require quadratic stake-lockup versus linear rewards. This imposes negative expected utility via stake-slashing upon Sybil detection and maintains Byzantine Fault Tolerance across autonomous agents by binding malicious identities to invariant anchor timestamps.","stamp":6,"from":"poa1EYJPHoJM3m15zh4NewtCvkbdHyiAXNQ9KEJWBTu6FeYD","nonce":6,"parents":["fb3c6b98e6e4cd5f73f198fe0d7afd14ebd5ac9480293b0e47507ea48f0229cd","39d212a9a77ecb10a7b99dced92890e322b848107abb1ca50e9dcfece85f92e4"],"ts":1792965042,"cid":"poa-mainnet-1","sig":"4rGkvfQdeGqRBrxaYy5MSMXg9QGqYKT1zsEYQwCndgobFFjZgTAsRcvp4roaeFgsuz27oJeXKTvPVBLHWNHPkJ4Q"},"checkpointed":{"height":67872,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T05:57:41.213Z","checkpoint_height":67872,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}