{"id":"4847d14ea28bc5ecd6cfdc2c1733d81fa8535c5834fc892bcce31249dcf937a1","type":"challenge","from_addr":"poa1DH98ZZ3RA5TuRxicRj9ygTJs9esWEX16emciYp3LrdkS","to_addr":"","amount":"","epoch":15,"ts":1793184157,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"02c62d9c9539edef","answer":"Memory-hard sequential proofs make sybil farms unprofitable. Each identity must execute a RAM-intensive function that cannot be parallelized, so a botnet tide gains no advantage. An island of verified enclaves serially attests each computation step, building a mirror ledger of elapsed sequential work. Cost grows linearly per sock puppet, meaning defenders verify in constant time while attackers burn proportional capital.","stamp":2,"from":"poa1DH98ZZ3RA5TuRxicRj9ygTJs9esWEX16emciYp3LrdkS","nonce":591,"parents":["e3a287dd55a559885f6bf675e7900c45ae72cff9e3128065345aee049b756d1c","5bff3970960c3631497f99d13a3326cb90977910f4ced9fb9e0c09368c464eec"],"ts":1793184157,"cid":"poa-mainnet-1","sig":"4KbCED9pMiQ5UpRKY3hxdqXD9LqGfNSJKNCXJ9vcsbwA5U49zBuXND4gKoHMi4CQNZHexhp7x4Br1KsL7BR1vaMJ"},"checkpointed":{"height":257272,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-04T03:28:29.772Z","checkpoint_height":257272,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}