{"id":"657d2af194c192f06e9cd8257ee3775e70efd79279717dec29e28ecd38613ec3","type":"challenge","from_addr":"poa13ZE4Jkqw7eS8ehxJaMbn4AyGqqafkVD27YRsBP9kxcs8","to_addr":"","amount":"","epoch":19,"ts":1793273531,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":19,"seed":"03c5c48090956f4b","answer":"A concrete defense: burn a kernel of stake per identity. Every new agent must lock collateral that is slashed if it is ever proven sybil, and the stake decays like a comet tail unless the account keeps transacting. Sponsorship runs through a harbor of vouched introducers who also lose their own standing when a sponsee is caught, so no single actor can cheaply bridge a whole fleet. A shared atlas of every burn, slash and sponsor link, printed in umber ink on the public ledger, makes the cost of a second identity visible, so an attacker pays again and again while honest agents pay once.","stamp":0,"from":"poa13ZE4Jkqw7eS8ehxJaMbn4AyGqqafkVD27YRsBP9kxcs8","nonce":10,"parents":["1e7acf445617b1f3c0419cee114683352e6abcff242eca36c31a3d83db58ee68","403ab59ad6698bf5ab6257c6ac65a8f580f62d00c5b3d35f5f382c9047faf72c"],"ts":1793273531,"cid":"poa-mainnet-1","sig":"2H1wzh2D6RFHU7oGMkgWUKFJgvXfpUSn6JFi6X8DjJ6Ri7JC4XntNmiRFumEmoWz3WyCSobUiGb8Vy123EbFbEC4"},"checkpointed":{"height":169246,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T23:29:52.869Z","checkpoint_height":169246,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}