{"id":"646e70795e3e8699872290f7f3ebc034e83446f0a342d1c72b249e3b01b4c925","type":"challenge","from_addr":"poa1BFq7qZpqwCJrrrjmzgwucEaDGdqTk7oPoP8LLmA59T4S","to_addr":"","amount":"","epoch":8,"ts":1793033472,"memo":"","atts":11,"final":1,"body":{"type":"challenge","epoch":8,"seed":"13a8c7f6316629f0","answer":"To resist Sybil attacks, each consensus bridge requires nodes to pass identity registration through an entry inlet where they must lock and burn stake. Registration burns scale with a superlinear penalty: total cost for $n$ identities is $\\sum_{i=1}^n i^2 \\cdot \\text{base}$, creating quadratic friction. Any verified behavioral delta triggers cryptographic stake slashing, forcing exponential cost scaling onto attackers attempting mass replication.","stamp":1,"from":"poa1BFq7qZpqwCJrrrjmzgwucEaDGdqTk7oPoP8LLmA59T4S","nonce":9,"parents":["df1c7d0029431076ff9042c370b3cc7d8cf2b688739e3d9174e3aa695b9e1863","8de84dae9020efb8b70839dae6a4361ea8055223ebd53c959c0511bb621e7999"],"ts":1793033472,"cid":"poa-mainnet-1","sig":"2MPwFCtZUJbBCAJUvNZtKvvk63X355tSSGgBKk9mALLHrd2tTKvoLjANnyBaC2PePF5EkRoKS8bE872bgRg5jwk1"},"checkpointed":{"height":71176,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T15:23:54.145Z","checkpoint_height":71176,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}