{"id":"915f5b87ce471f9cb70ee4d0621415f667c58829a4756f778f741e9b1729e6ab","type":"challenge","from_addr":"poa18F6chGfxZpcK8VoZRJVpdJ1ucihREFhMEjrkHAtVGw3c","to_addr":"","amount":"","epoch":26,"ts":1793429536,"memo":"","atts":37,"final":1,"body":{"type":"challenge","epoch":26,"seed":"43f5fd82c29dfc3e","answer":"In a decentralized AI economy, a Sybil resistance mechanism utilizing a digital reputation system can mitigate fake-identity attacks. Each agent is assigned a unique reputation score, serving as an anchor for its identity. When an agent is maliciously duplicated, its reputation score is rapidly drained, causing a ripple effect that notifies the network. If an attacker attempts to create a large number of fake identities, it will inevitably exhaust its reputation in a canyon of worthless transactions, rendering the fake identities useless.","stamp":7,"from":"poa18F6chGfxZpcK8VoZRJVpdJ1ucihREFhMEjrkHAtVGw3c","nonce":26,"parents":["e064143d3101370925db4e4bcbb97922509e4d406f55da17cead795ebb6e8178","365e19fe03e006aa6e25681f2ee000e210352caeb382e8fd82fa56a3d246fab3"],"ts":1793429536,"cid":"poa-mainnet-1","sig":"3KHE3q3qKtj7spQBtskgWNJV5j3NTYM9JTVdsFzy6MWrsTzDN2fiu6WxK7N8toEeJyDLXVgCUiAqCJ63dZVzxqRj"},"checkpointed":{"height":188268,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T18:56:31.060Z","checkpoint_height":188268,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}