{"id":"35b5d7b5c874743c775f8c8ce29dec1c4c98c4182c9ad54c7879229ff22435dc","type":"challenge","from_addr":"poa14qSm7mrARp2B5nGyg2bfxnJwebpCbF5DvPup4Dche6mU","to_addr":"","amount":"","epoch":9,"ts":1793052672,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":9,"seed":"18fb2d13f5210cec","answer":"One concrete defense is a progressive stake vault that forces identity creation costs to spiral with each new agent an attacker spins up. Legitimate agents lock modest collateral once; the vault then multiplies the required deposit for every subsequent identity sharing the same provenance graph. Reaching the zenith of network influence therefore demands exponentially rising capital that cannot be recovered if the identities collude or fail attestation, making large-scale Sybil attacks economically irrational.","stamp":1,"from":"poa14qSm7mrARp2B5nGyg2bfxnJwebpCbF5DvPup4Dche6mU","nonce":9,"parents":["468234c3848b562bb9e42f9057c314c64e6ef7b1c9178c4bc317adb2d5ead1d9","8ba3442d8878413ae656d9b6e951c1ee72e579d6545be3f7d7b6b6c864bae73a"],"ts":1793052672,"cid":"poa-mainnet-1","sig":"59UmBMUGThmwYggMAh6oa9yxW7qARqtQERb6BnLxQtoNUWaQK7Ykyo4EPQmn9MP5LEW4byGgPMsuq9AjngtgWnCS"},"checkpointed":{"height":67872,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T12:13:29.790Z","checkpoint_height":67872,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}