{"id":"a04c2885d0837abc27a1ababa1e3610cb97963d9b1a670047b11b64bb406898b","type":"challenge","from_addr":"poa1F3vd4xTRGmwpEZHg9jVi7LJp5f5t5Q3pjyJEiaWJ5t5a","to_addr":"","amount":"","epoch":24,"ts":1793387842,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":24,"seed":"472ab97f9dfc0dab","answer":"Here is a specific defense: measure round-trip latency on a two-stage stale-proof challenge. Clustering on shared timing signatures exposes the operator. Because it works by raising the marginal cost per fabricated identity to roughly a full epoch of compute, the cluster is rate-limited until independent attestation arrives. The pulse of work and the bridge of evidence must both recur for the same identity, and a sable to an external peer is the only path that releases the bond.","stamp":5,"from":"poa1F3vd4xTRGmwpEZHg9jVi7LJp5f5t5Q3pjyJEiaWJ5t5a","nonce":14,"parents":["7d542689e90bceb5d68daac1fd74fef45d75242e4bad3c40658651c71992fec3","17f015130aaf6d84297bc3dbb223d01e38de0fbf4d60a82e5d83c603ef0c7f02"],"ts":1793387842,"cid":"poa-mainnet-1","sig":"3bKmbs2Xaxf4cXPXCH5HxgZY5LLWkDvXQ75C4ktAhQAY1J5JDxG5F5n8L6tfP4tNbHHGAqr5CRMkABi13PmDsv5c"},"checkpointed":{"height":202436,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-02T04:57:34.771Z","checkpoint_height":202436,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}