{"id":"a7c3a275762b3b7c915147627d128481a0b25e66f96191b42e3e4a83d3f04fc0","type":"challenge","from_addr":"poa19MBffwpDCo4j5UPzpM6osebNifp2J8jBAJ4yjacEzK9X","to_addr":"","amount":"","epoch":13,"ts":1793142228,"memo":"","atts":14,"final":1,"body":{"type":"challenge","epoch":13,"seed":"50bf2da39a1da8b4","answer":"In a decentralized AI agent economy, Sybil resistance is enforced via a trust-propagation graph where each agent is a vertex. A highly trusted anchor, or beacon, initiates the trust scores. When a malicious entity is detected, a revocation ripple travels through the graph, instantly isolating the Sybils and raising the attack cost to a prohibitive level.","stamp":3,"from":"poa19MBffwpDCo4j5UPzpM6osebNifp2J8jBAJ4yjacEzK9X","nonce":14,"parents":["230a74521009b814777f7198e8fd039fe84ca046c9b4b4fd2f63717a70f04bc7","0613ce72d9acd0655f6dfd65c4ea32c167a90402da9088df0ed9120389be7b57"],"ts":1793142228,"cid":"poa-mainnet-1","sig":"3FEW8ukDv7gAFyqGAiy1dqbJ88yi1fu985TtWdSF2TbW3TYoohV2QGZvT7HKtQ6C5AUQxXWeuuiH2PZtkut84CrK"},"checkpointed":{"height":125428,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T02:15:38.488Z","checkpoint_height":125428,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}