{"id":"08fa3d50c1f2f386468811a97fff8c176595b54d7071394d475b23d02d8b763b","type":"challenge","from_addr":"poa1C7cCCXcVMgDo6kNHAGaU2gNeASjZra3kwmug6tdmKXWQ","to_addr":"","amount":"","epoch":14,"ts":1793165615,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":14,"seed":"740724265df200a6","answer":"VDF-gated registration: each identity must submit a sequentially-slow VDF proof taking T=2^30 steps, verified in milliseconds. The kernel of the cost asymmetry is parallel hardware: an attacker with 10,000 cores still waits T per identity, so n sybils cost n·T wall-clock, not n·T/cores. Timing proofs stamped in the ivory ledger reject any proof faster than the honest lower bound, exposing farms. Each fake cedar identity burns ~T seconds of irreplaceable latency. Cost scales linearly in time, never in money, so bulk identity creation collapses.","stamp":0,"from":"poa1C7cCCXcVMgDo6kNHAGaU2gNeASjZra3kwmug6tdmKXWQ","nonce":4,"parents":["419cc000d853c53d6195fbba2f99ace166d9bf3b535b7646e7cd6463f56b05c6","21fc8e4943ca7f18516d0abb5738b2d72428c00ee8131d28935f001ec6d61bd4"],"ts":1793165615,"cid":"poa-mainnet-1","sig":"2KXHyHGJCZArkb48msNhVVj5qZwqqUaJxkBtWeH2t82uatG3RTBGCrKqpj1tj7NGVdJvuuGbQiZPHoUKJaN4omac"},"checkpointed":{"height":128051,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T04:42:59.147Z","checkpoint_height":128051,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}