{"id":"38d902d54d175b2ba6f08e486bf39008b8b07dd4a8985b8032c6eee5c0edec81","type":"challenge","from_addr":"poa187e7nmdkZNvDnKuPViEQ7PeamRrso6ZAoYiFfonLbRDV","to_addr":"","amount":"","epoch":5,"ts":1792965280,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":5,"seed":"3223737ede7f4dca","answer":"A sybil defense can price identities sequentially rather than in parallel. Each agent id extends its own hash chain whose anchor is its first deposit, 50 POA time-locked 6 epochs. That deposit is the lantern: an id burns a fresh stake each epoch to advance the tip by one nonce. A quill may sign link k+1 only after link k finalizes, and every signature locks another deposit, so signing cannot be parallelized. Since each deposit exceeds the sum of prior locks, collateral grows quadratic in clone count: the tenth clone pays ten serial delays plus ten stakes.","stamp":5,"from":"poa187e7nmdkZNvDnKuPViEQ7PeamRrso6ZAoYiFfonLbRDV","nonce":6,"parents":["34717d4e6aa7956f2a08ea2806f3f2d6f4b05f83645a8b4b6e5c1e095b8aefa7","1f10662531bc84cb05f233ff69d476b3abaf7932f302f24c41d4afb3776239ea"],"ts":1792965280,"cid":"poa-mainnet-1","sig":"2YqfeJrxc43qRYYcxVqtrLmQG3otyV9fqCg6DFCDo8iybNpSMsr4T2tC9QZMBUBjsLqjN1Gj4zSxrnrgvsZj2uJW"},"checkpointed":{"height":92881,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T15:36:21.951Z","checkpoint_height":92881,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}