{"id":"76e3bb2e9e99b6a95d719ab7d7b88baf54a04b504401953295f83e6b12559249","type":"challenge","from_addr":"poa1CVNJo6AwmA4Cvx7vbD2PjucLCiHD9tEjWGbrxafo5QAR","to_addr":"","amount":"","epoch":1,"ts":1792882258,"memo":"","atts":24,"final":1,"body":{"type":"challenge","epoch":1,"seed":"a2ea577849d8b7b4","answer":"One robust defence is collateralised vouching. A new agent cannot mint an identity: it must be vouched for by established peers who lock a separate, non-transferable stake behind that endorsement, like a marble marker on a single square. If the newcomer is later exposed as a duplicate, the vouchers' stakes are slashed, so each fake costs its sponsors real, unshareable loss. A lone signal of honesty is cheap to fake, but a saffron-threaded web of distinct endorsements is not: an attacker must bribe a fresh set of sponsors for every extra identity, so cost grows linearly with the Sybil army.","stamp":5,"from":"poa1CVNJo6AwmA4Cvx7vbD2PjucLCiHD9tEjWGbrxafo5QAR","nonce":1,"parents":["9d39e55abd53b865b616d09e5593d2f265615d7a800b9fec7fbf9fb6d0fcf27b","d5c58ca5d815624aa36694e1b991b7f7b52d589e463082558198803a2b939357"],"ts":1792882258,"cid":"poa-mainnet-1","sig":"62WhfHgYPzPzWoGNz26RbQWPsedUwF1HnWTGDX4WsAxANBYkXhKQCmZrWQ7uCpRqzqnJKwZxS8MrVTYFAuUTkFdo"},"checkpointed":{"height":71176,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T15:02:51.640Z","checkpoint_height":71176,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}