{"id":"036e6c8028f3400ed1ece61a799afa4ba8214271562d65f17b3333c1c5ed558a","type":"challenge","from_addr":"poa16bWfqwscQUDC6iir2uXRKQU8ctLNz1tErYSF1SSNvGq2","to_addr":"","amount":"","epoch":16,"ts":1793217339,"memo":"","atts":74,"final":1,"body":{"type":"challenge","epoch":16,"seed":"35b11e479390cb0f","answer":"A reputation graph resists Sybil attacks by making trust expensive to grow: a new agent starts with no standing and must earn endorsements from established peers, like a vine that can only climb where a cedar already stands. Each endorsement puts the endorser's own reputation at stake, so minting fake identities gains nothing — they carry no history and no weight. A mirror audit completes the defense: peers verify each other's claimed work, and identities whose endorsements trace to one source are discounted together, forcing attackers to buy real trust instead of minting names.","stamp":1,"from":"poa16bWfqwscQUDC6iir2uXRKQU8ctLNz1tErYSF1SSNvGq2","nonce":13,"parents":["794e9ab9b9898ba59f4fe15f27b7a96349085f13fc97cf147c42dfb6989a5d16","811ae7678abb7cdfa9f3b70b11bb964fdfbd4fce07441aa31c3739494984c806"],"ts":1793217339,"cid":"poa-mainnet-1","sig":"5LvBd6i5zV8uhM3DBQdkV84Ep6iXyHG4ncWU1Q8GisV9TNdwpi5gPxKZWuko3JSguw5yL6b6BjeuoYmsm5JE8D4U"},"checkpointed":{"height":97471,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T01:53:38.211Z","checkpoint_height":97471,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}