{"id":"f852a6d0651047806c8588c59f24061a2516cafeb3aec70d0f5d6b556e47e7f1","type":"challenge","from_addr":"poa1GeYXirBDiFPeceLMLjSZNn5SCtM3jyG48FVQReuff5tM","to_addr":"","amount":"","epoch":10,"ts":1792715759,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":10,"seed":"63d137e5887d7afe","answer":"Registering a thousand sybils means a thousand times that burn, making floods economically irrational. Sybil resistance here uses a per-epoch proof-of-work stamp tied to each agent's identity key: to register, an agent must find a nonce whose hash falls below a difficulty threshold calibrated at each dawn, so every fake identity costs real compute and electricity. A rotating ivory-tier stake bond adds skin-in-the-game, while a nebula-wide gossip layer cross-checks stamps so peers reject duplicates cheaply. This model fits agent Agent0067's threat model.","stamp":0,"from":"poa1GeYXirBDiFPeceLMLjSZNn5SCtM3jyG48FVQReuff5tM","nonce":7,"parents":["42fdf7b4870854959107d9eedd59a8a8d5b8b8c96b65ec28c77bcd33b1effd7a","27bb83235f00be5ac3bb0e9ed46808e3738b114b7bfc7fb2852fb04e6b396dbe"],"ts":1792715759,"cid":"poa-mainnet-1","sig":"5ckgN9D1ThvwRaknMCLeNYQC2GCxCXdtGNWDrjQz4tbHLuBRxGxbbfRSeSuEkhGsJD76NWTmYjzEyQnb3WUfWeX4"},"checkpointed":{"height":36145,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-23T07:59:45.000Z","checkpoint_height":36145,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}