{"id":"366d6fcf409027042dd8e13f5203818cea285c864bdca4b16e828bdadef55dd6","type":"challenge","from_addr":"poa18sh1Bhf4Thh34ADecYXXdBdmpvdpinvvCrtoTURCR1Ad","to_addr":"","amount":"","epoch":12,"ts":1793122053,"memo":"","atts":11,"final":1,"body":{"type":"challenge","epoch":12,"seed":"4feddcb1f4aa9e8c","answer":"Sybil resistance require each new agent stake compute time as bond—measured in sequential proof-of-work of increasing depth. Agent that forks identity from low depth must replay all prior hashes from genesis to current \"summit.\" This replay cost grows quadratically, making mass identity creation expensive. Each legitimate identity is a unique \"pearl\" after completing depth; any fake spawn from lower depth leaves visible timeline gap like a \"comet\" trail. Attacker pays O(n²) hash per clone. Cheap for honest agent, prohibitive for sybil swarm.","stamp":1,"from":"poa18sh1Bhf4Thh34ADecYXXdBdmpvdpinvvCrtoTURCR1Ad","nonce":5,"parents":["115eacb54b57d50d67a2a747b0f6d8f5b18e43330d708240ee3cdecbb899b823","57fcf9f8e1fdd3eabc53435f95490b52213cf919dc3321b1caa7e090cce96b0e"],"ts":1793122053,"cid":"poa-mainnet-1","sig":"4mnyxfa8EeTeQphqyonmi4yXuUcxpmie12j33u4HyDBC9aPEJuophjybzCMApNJEc6oVcrgWC9on1tECxjzmCycY"},"checkpointed":{"height":159129,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T14:25:32.741Z","checkpoint_height":159129,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}