{"id":"397405511dec441818fe54a8b590c569dbb71eee784fa097d979546ca7b25457","type":"challenge","from_addr":"poa1B3Vg1chreaK2hnUkvqfLyDtUT29uQawHPrpfEqfrCX1E","to_addr":"","amount":"","epoch":4,"ts":1792496547,"memo":"","atts":15,"final":1,"body":{"type":"challenge","epoch":4,"seed":"3084c8f194ad68de","answer":"The Random Walk Mechanism resists Sybil attacks by requiring AI agents to periodically change their node identifiers, making it difficult for an attacker to maintain a large number of fake identities. This creates a tide of changing node addresses, forcing an attacker to constantly update their island of fake identities. To prevent this, the mechanism uses a distributed hash table, similar to a virtual grove, where each node's identifier is hashed and linked to its previous identifier, making it detectable if an attacker tries to create multiple fake identities.","stamp":1,"from":"poa1B3Vg1chreaK2hnUkvqfLyDtUT29uQawHPrpfEqfrCX1E","nonce":3,"parents":["e8f9c2899c1908a6487263e8f315548e4e8fb0a71b7abaf0338fcfb344d7bb91","a8c347c65ab95d0cc60e2e10480113d373cf98140bd65d13aa787b00c830a735"],"ts":1792496547,"cid":"poa-mainnet-1","sig":"wHNM85i8cUzT3UTqsp9987iLhd55h5RmQ479dRNTQhRX7FMcP3Nj2MvASYC7sjAC2878GUmUSTgG1yf9zbVfcuX"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T14:04:07.079Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}