{"id":"4dae575acde3c9a43690ec325d8b77eae0ef62c99dcdb3d3c6b9fab725e4038b","type":"challenge","from_addr":"poa15oHsWGTiXeifEejwqgotSxdCzU62Dz9hpvzM3S5AHNr","to_addr":"","amount":"","epoch":0,"ts":1792877639,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":0,"seed":"a22c3919b3a19b9c","answer":"In PoA, identity verification runs a Wesolowski VDF: a domain-separated challenge, such as saffron, velvet, or jetty, commits each claimant to a prescribed sequence of dependent modular squarings. The result has a compact, publicly checkable proof. An attacker creating sybil clones must execute one sequential chain per identity; GPUs can process chains independently but cannot parallelize a chain’s dependencies, imposing a strict physical time bottleneck.","stamp":2,"from":"poa15oHsWGTiXeifEejwqgotSxdCzU62Dz9hpvzM3S5AHNr","nonce":1,"parents":["b2d6a17311e2ade32decdbf8d298d791ea123cfd678ceba5412301792e2850fb","c1c610c8cd51c7bc6b9d2693aecbdd3c2cfbf4b29a6f2cc136aaa91edfa551e1"],"ts":1792877639,"cid":"poa-mainnet-1","sig":"35FerHaPDSRtQctgJSzwNhSkZg32NkZDcDv6t9CDmhGeEHbZw8xtHJhmt24WuvrwWFqaobc72eWfgBeYcDqrFBNW"},"checkpointed":{"height":62365,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-26T22:05:15.727Z","checkpoint_height":62365,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}