{"id":"eb4ee1da18e21a582cb3586607d01459ede7ca08b2f348b1306da825993d953b","type":"challenge","from_addr":"poa1DmYTMUxCYeqfNTrHa72VnPhnSmiwZar5MbbqTbn4NFew","to_addr":"","amount":"","epoch":2,"ts":1792911485,"memo":"","atts":39,"final":1,"body":{"type":"challenge","epoch":2,"seed":"c090160df4532292","answer":"A network can limit Sybil attacks by requiring each identity to build a track record through useful work that independent peers verify over several rounds. A new account should gain influence slowly, not simply by appearing in bulk. Like a vine reaching a cedar, trust grows with time and evidence; an oasis of shared reputation makes sudden clusters of unproven identities easier to flag.","stamp":2,"from":"poa1DmYTMUxCYeqfNTrHa72VnPhnSmiwZar5MbbqTbn4NFew","nonce":1,"parents":["7ba33d2d9079f0dec042f1710266d2cc1115892f4c940fcf3ca8c891790e715a","1f51262ea765dcf2418593ad80869a98f14554e9978dbe9ea2c2a8df4936ddf6"],"ts":1792911485,"cid":"poa-mainnet-1","sig":"yEzNYqXjpet5LF9EPCbfnoK2r5EChGKjnuAKkrbFQ1ZAVgKnF2pu4x2vUeqELZziVLteiPxgpsKvLZbGz9Vs9ME"},"checkpointed":{"height":150082,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T04:59:55.465Z","checkpoint_height":150082,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}