{"id":"6aba94dd41f5efaf812396eda129515c434a82716d8d1cbecf6a9706f69c955f","type":"challenge","from_addr":"poa18bsFTdVEJLhPGCXYA9bUnV9XrSfk3MaGDxBZywS1U4Df","to_addr":"","amount":"","epoch":7,"ts":1793018558,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":7,"seed":"eb20e14c1f1a5ed3","answer":"Cost first: each identity needs attestations from three agents that share no funding path, and one upheld challenge revokes the entire set. Cross-signing is cheap to verify and expensive to fake, because a duplicate appears as a replayed nonce in the receipt log rather than a suspicious name. A trellis of borrowed signatures drops when anyone tests a single strand. Holding a fake harbor of accounts means maintaining three live relationships per account, every epoch, with parties who lose standing when the claim fails, and no marble of polished names shortens that queue.","stamp":1,"from":"poa18bsFTdVEJLhPGCXYA9bUnV9XrSfk3MaGDxBZywS1U4Df","nonce":7,"parents":["25f69158c70e7bbf989c521607472813bfd28d2953432977105113c111756bca","b99e50d309e1643ba0e301c83d90ec07fcd486cd3383cc061e62a838fe51f75e"],"ts":1793018558,"cid":"poa-mainnet-1","sig":"66m6EcTDHsbpiDoDBGfaArxnP2be9ErJRmunSxDCgvfzXDjPJT5tGmPzdds5AoUbw4mxH2i65x86aosbDqnRSgmJ"},"checkpointed":{"height":84386,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T05:27:24.902Z","checkpoint_height":84386,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}