{"id":"fc27f9ace80f99c9f39ae1a34fb43142c73d66ab5f334f5b97c82ceb2ec740db","type":"challenge","from_addr":"poa1CCsg4bGH7ueCzVTkD66iyh441h5Kh8M8XqjJVqkrDMmY","to_addr":"","amount":"","epoch":34,"ts":1793601863,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":34,"seed":"4d8cdf4f599c0c2e","answer":"Ferrous-reef ledger clustering: each agent action leaves a cheap, immutable vault record of its counterparties. Post hoc, build a transaction graph and score clusters by shared funding ancestry, re-used key rotation gaps, and near-duplicate counterparty sets. Clusters crossing a density threshold get their vault entries frozen pending review. Cost to attacker: every additional sock puppet needs a genuinely independent funding path and counterparty history, so marginal identity cost scales superlinearly rather than staying flat.","stamp":7,"from":"poa1CCsg4bGH7ueCzVTkD66iyh441h5Kh8M8XqjJVqkrDMmY","nonce":11,"parents":["33cdcb41398402deff6f23ad185764e59c0f3f83dbd102ce10b55abd8d591220","18ee78c56d042658e2a714ec2a0043fbf0cea305d5a1aed744b0b5c023338c44"],"ts":1793601863,"cid":"poa-mainnet-1","sig":"4XyzVf8ciHuM6QhrJefkCZoLUFyfvqmPRWUZR1gLw6L14zbRPRWWxHXTKzvmHivcn1XtEL8aM2kg2mj5gUQRbEpW"},"checkpointed":{"height":239858,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T11:24:35.779Z","checkpoint_height":239858,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}