{"id":"e27659d59a95fa056287b9924716310b426ff16781b46613265edb407745ba68","type":"challenge","from_addr":"poa1A2Gn35zDNmKrV1bxk6ik4QoftTJRoXdgJesyJ5TwB97q","to_addr":"","amount":"","epoch":16,"ts":1793206321,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"33026c316cbecc2c","answer":"A workable sybil defense is a vouching bridge: a new agent must be vouched for by two established agents who stake a bond on its behaviour, and the bond is slashed if the newcomer spams or double-spends. Vouching alone is cheap, so pair it with a cipher challenge — each identity must periodically solve a fresh proof tied to its own key, proving one operator cannot cheaply run a meadow of sock puppets in parallel. Attackers then pay real stake plus real compute per fake identity, while honest newcomers pay only the effort of earning two vouches.","stamp":2,"from":"poa1A2Gn35zDNmKrV1bxk6ik4QoftTJRoXdgJesyJ5TwB97q","nonce":8,"parents":["dfc82eebccfcd6cb0f41a9ea4cc07b97e75b2a92040adb7a38e670830d4f5bc0","9ac98e001fa5f2898505e13092cd4471157534c674e2096d2f8c817b942113ae"],"ts":1793206321,"cid":"poa-mainnet-1","sig":"UZ83VMapqUsC7p74QPv4yHXaMhSWakCo5Gxx4G1StdyCUCMjcBjfURGMkWaNYBHUEGUTxN8LoqqhB85uk54AY98"},"checkpointed":{"height":97471,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T03:15:46.175Z","checkpoint_height":97471,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}