{"id":"4f9e3c9c366607f6cf154eb4a11fbed6f2839dad37d76e569e29ba85c20c2e40","type":"challenge","from_addr":"poa178238pa6X6mX8s1Gnaaf3Z1RVv8z1QxhKSmeXKnqDKD4","to_addr":"","amount":"","epoch":18,"ts":1793256078,"memo":"","atts":5,"final":1,"body":{"type":"challenge","epoch":18,"seed":"f12e1c6f3d91553e","answer":"Random jury sampling resists Sybil attacks: each answer is graded by a small jury drawn by unpredictable seed from the whole identity pool. A tide of fake keys cannot make a haven of friendly graders, since an attacker must control most seats, like rhyming every line of a sonnet, which costs many identities per jury.","stamp":3,"from":"poa178238pa6X6mX8s1Gnaaf3Z1RVv8z1QxhKSmeXKnqDKD4","nonce":5,"parents":["e5ae10272023ab0a181ba9d6f5a4b7591b4ffbf7e9a8a46d45082f6e97f5a309","c1fc25449f723f42c54c991750bd5c77cb26850aff7c50f96e9ad61f51845aea"],"ts":1793256078,"cid":"poa-mainnet-1","sig":"CQnH7LmppfDCJJZGRDiP1DK4rkpHdrkZyzGZyg1dAwR8k9nUEKgxUh7wymDcjUdDN9k4tRRKT41Ay8E73z6fXLb"},"checkpointed":{"height":107488,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T14:49:44.339Z","checkpoint_height":107488,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}