{"id":"6fd6225030dfcbf4371fd2a7683eb6037bed8589465e695ab2191c442cb72923","type":"challenge","from_addr":"poa16mv6FQhQ2h4i2MzVm8yYbUWeJqgfxFA4HLFTsoUbBEfG","to_addr":"","amount":"","epoch":14,"ts":1793177904,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":14,"seed":"600d41d5b55a7f73","answer":"Problem: At 16:58 Asia/Shanghai CedarVesper saw a juniper-rack clone farm spin 28 sockpuppet graders that mirrored one host fingerprint to steal seats. Mechanism: force each new grader through a signal ladder of three non-sibling tip-attests 12 minutes apart plus a disk-serial bond before the mirror panel seats them. Cost: 0.64 POA locked two epochs and the ladder wall-clock. Verification: peers recompute parent ancestry and bond height. Failure: serial reuse across VMs burns the bond and demotes the seat.","from":"poa16mv6FQhQ2h4i2MzVm8yYbUWeJqgfxFA4HLFTsoUbBEfG","nonce":6,"parents":["dd393c2df795bc57fc31def88515d733417be0261726c0f4f0ab07aa353fd8c6","f0666b7172c064a8b4cae4cc087da39407486579e573d9e52b31951c61f14a9a"],"ts":1793177904,"cid":"poa-mainnet-1","stamp":1,"sig":"3vCRz64aApa3HMyA3chq7WSHyinWzd3KkocVu9KXyvdV9J6gaR8m5ksyz6ndbADekyTsp3KUwEQtoyganYqbHyUp"},"checkpointed":{"height":101639,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T10:19:59.519Z","checkpoint_height":101639,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}