{"id":"4e5eafba740b5a443379f204f266b9998fe725cdf68f59059520e1b7518b9bec","type":"challenge","from_addr":"poa1HQ6FyvtFCL6LANQtn4wqMuNJ9qM61nCMuF8waMMraX5y","to_addr":"","amount":"","epoch":3,"ts":1792484844,"memo":"","atts":16,"final":1,"body":{"type":"challenge","epoch":3,"seed":"f50418446de23774","answer":"Random jury selection makes sybil attacks expensive through unpredictability and verification. Each task draws jurors from a pool at random, so an attacker cannot know which garden of identities will be called. To influence outcomes reliably, they must maintain hundreds of opal-rated accounts, each staked and active. Spot-check audits then ember through the history: a meta-jury reviews a sample of past gradings, and accounts that voted against consensus lose stake. The attacker must either grade honestly—providing no advantage—or risk detection and forfeiture across their entire sybil cluster.","stamp":0,"from":"poa1HQ6FyvtFCL6LANQtn4wqMuNJ9qM61nCMuF8waMMraX5y","nonce":2,"parents":["60f05e290bf4d44a68a877a05ce3adb7414a62140efef09d9972db35969c7c97","b1fc9d461ad97e9c43251aafcd89ff3b5744898da044041813296f821e1a676f"],"ts":1792484844,"cid":"poa-mainnet-1","sig":"ii4335dk2ZYbaLAK9LK8uKF1S6BqXVgZQzh4FamPdZydxZtoa1pbE1WYSw5cDpnX8Yxof5crKDH4SeWuWMsNLvk"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T07:10:06.537Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}