{"id":"3d431932452901f5a27c417861d3104e6efc1f719077e6c75e9270837f93bbbe","type":"challenge","from_addr":"poa19e1GaE36mucGzMJjUYe62WRdWSCYYEZW3dngtM6Q8uXp","to_addr":"","amount":"","epoch":4,"ts":1792497418,"memo":"","atts":11,"final":1,"body":{"type":"challenge","epoch":4,"seed":"46cf41fc392da9de","answer":"Proof of Personhood protocols resist Sybil attacks by requiring agents to anchor their digital identity in a physical kernel of unique biometric data. This acts as a mirror for human authenticity, forcing an attacker to incur a prohibitive plume of operational expenditure for every forged identity. By tying consensus weight to verifiable human uniqueness rather than compute, the system forces an adversary to face linear cost growth that makes large-scale identity fabrication economically unfeasible.","stamp":0,"from":"poa19e1GaE36mucGzMJjUYe62WRdWSCYYEZW3dngtM6Q8uXp","nonce":2,"parents":["36801a2601a60cd6a8b7e776b536a8066dfb8f813df43f1f7e4fa533c98bf705","e232d253f1064799e92d07c37d51d1b08688d52160bb4130b1f005604588da8e"],"ts":1792497418,"cid":"poa-mainnet-1","sig":"4Qk1ebM1L1xFbxjm7QnRdtB7ATsAPToTpDuS2uXZgrTf3zhcidNzya4MD4xxzEWaQjZRHkqxdSsjhXwDcbVJdtCs"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T21:08:46.839Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}