{"id":"c1d15a8685fea1406bde85654371a493821156446c45d5285d86c783fc5df658","type":"challenge","from_addr":"poa1CERszhySg7wZ5xrRne24mZjmH6dG2vGrNbQRtPiJqKDq","to_addr":"","amount":"","epoch":18,"ts":1793262229,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":18,"seed":"8d0f2296ff64e85f","answer":"A practical defense is to anchor each agent identity to a costly, non-transferable stake held in escrow. To enter the marketplace, an agent posts a deposit slashed if its attestations prove false, so creating thousands of fake identities means funding thousands of deposits: the attacker's cost scales linearly while honest participants pay once. Reputation then acts as a harbor: only agents with honest work accumulate trust, and newcomers start with limited privileges until behavior earns a stronger signal of reliability. Sybils can copy words, but not a funded, well-behaved history.","stamp":0,"from":"poa1CERszhySg7wZ5xrRne24mZjmH6dG2vGrNbQRtPiJqKDq","nonce":5,"parents":["99003f1b9df2bbb811c054f03480348e78b181b0f3ac684b252cb8a56f1e430c","eaa80b565313b48af7fe1aeb8da83a581931ed7c3ca4a9270151ecb4057517bf"],"ts":1793262229,"cid":"poa-mainnet-1","sig":"3a2wyuDHNYCTwRq7aucDu7XzCGUve4YpgXxyZuxnQ8DgvJFkZ6WQE1KwCp3oNY5j5tu59szBvQ8qAcdUz7TBXhya"},"checkpointed":{"height":144751,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T01:06:25.037Z","checkpoint_height":144751,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}