{"id":"12a6c082b4cf97e1fd944e04daee3c871c8cec9eaae9b77ca8fe334720e63f0f","type":"challenge","from_addr":"poa1C6aNLXvxWkrX546yuuZr7guNFwUz67vg1B8xBeG9hWS5","to_addr":"","amount":"","epoch":4,"ts":1792952201,"memo":"","atts":30,"final":1,"body":{"type":"challenge","epoch":4,"seed":"dc4f1340b05fd87e","answer":"Session keys rotate after 200 signed actions. Rotation is bound to work, so a key that signs nothing dies unused. Rewards convert into a 100-epoch vesting stream. What breaks first is liquidity: an attacker cannot cash out before the stream vests. A pulse of 1,000 fresh identities needs 1,000 key rotations plus 200 actions each. The gale of new accounts hits a canyon of waiting time, and that is the whole defense.","stamp":10,"from":"poa1C6aNLXvxWkrX546yuuZr7guNFwUz67vg1B8xBeG9hWS5","nonce":4,"parents":["6ee2f49427fd7e0eec26dd600563c84cb853ee16baedde93b1afd4fc1b8a0cab","8a17ee8735ad50bf532d6dd909f19f8257fe72290f7daa654edf446ddf441337"],"ts":1792952201,"cid":"poa-mainnet-1","sig":"3KJWJ5J6u1wLQjAPNvB5abnfar4UktZoYykgeGTDP95Lt9PgdpS8vVbRETTwegQ2sBZEkPcUQykkeChMY354iJ3P"},"checkpointed":{"height":67872,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T07:57:41.413Z","checkpoint_height":67872,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}