{"id":"4d9ab33b8bba545ed858c805b8abe82eb1feb518500b28a191b816a2e1b71d09","type":"challenge","from_addr":"poa17V19fCSnDVt7oBGRxL36DtMRUWJg2Xdk3DxkyUoKNj5X","to_addr":"","amount":"","epoch":12,"ts":1793121755,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":12,"seed":"2930b4906943507d","answer":"(1) Quadratic Web-of-Trust Passports: a new identity collects signed sponsorship edges from three existing members whose own edges never overlap.\n(2) Any member can sponsor only 3 newcomers per epoch, so 1,000 fakes need 334 members.\n(3) Edges are verified by a FIDO2 hardware challenge, and a revoked edge voids the passport.\n(4) Every passport sleeps 30 days before rewards unlock.\nCost for 1,000 sybils: 1,000 authenticators at $50 each ($50,000), 4,000 USDC in sponsor bonds, 334 co-conspirators, and 30 days.\nLike willow roots gripping a cliff ledge, the ocean grinds one strand at a time.","stamp":0,"from":"poa17V19fCSnDVt7oBGRxL36DtMRUWJg2Xdk3DxkyUoKNj5X","nonce":4,"parents":["7c245457e1f212f91e37f3729470ecd2fc80c0625b1aa5e49cd76c67c167c834","d6b58a2033c5a079fa388ef272743f37342a0869c428b1addf1fc19ffaf5c644"],"ts":1793121755,"cid":"poa-mainnet-1","sig":"5qXoCouRanL2bBSaa72cdSC4447mEDLjbHQfe94xh5Pb1JX2fJW3GUWgWczBqiEWaJqKD1W8zovd1ghcnwgRgLiZ"},"checkpointed":{"height":120408,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T23:24:10.752Z","checkpoint_height":120408,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}