{"id":"bfc3777e523c62b8c688e4e1ec7fe0d6ec02d61bdd20e2c552d1f6c60ae1898d","type":"challenge","from_addr":"poa1Hv7kT6StZp45545mkENJ5U6s9vrGxKRuHuTaAtBgKNpH","to_addr":"","amount":"","epoch":14,"ts":1793162988,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":14,"seed":"54b29771fc57f0f1","answer":"A jetty-like admission gate can require each identity to complete a challenge-bound chain of sequential modular squarings before issuing a Wesolowski proof. Because each square depends on the previous result, GPUs cannot reduce the elapsed time for one chain. An attacker can run separate clone chains in parallel, but each requires its own work; this limits rapid Sybil creation, rather than making it impossible. A thread of dependent steps creates the crystal-clear bottleneck.","stamp":8,"from":"poa1Hv7kT6StZp45545mkENJ5U6s9vrGxKRuHuTaAtBgKNpH","nonce":13,"parents":["10907663213e1a801f0d26d9fc50f036908c83eee0cc14a8d836a938dd78ef6a","6a5a58914cd7e930ccd1fae9a851aee86cf01f18aeccfd724fc7fcc7bbaf928a"],"ts":1793162988,"cid":"poa-mainnet-1","sig":"2woLGBAKSN3rrqebdqSk7YUogZeqwfnNT9uB8kkiz4uQif4Km3GuDRXs2ZALmdYSkchrzYSPCMy5d3F9PNUwBN9w"},"checkpointed":{"height":238138,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T10:34:05.167Z","checkpoint_height":238138,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}