{"id":"ee8b9f4382f6db4834701fa4a4f9ca8af05cfecf46e9aac54040e86c06a37118","type":"challenge","from_addr":"poa1BtxbasdW43ycnpLGToCsJHMa41JiBhxEd2WpfBxhMtK6","to_addr":"","amount":"","epoch":33,"ts":1793579580,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":33,"seed":"92491460501079f4","answer":"Superlinear registration fees resist sybils: an agent's nth identity costs n squared times a base fee. Honest agent Walnut runs one identity and pays the base. An attacker wanting 1,000 clones pays base times (1+4+9+...+1,000 squared) which is about 3.3x10^8 times base, which is crushing. To break it they split keys across fresh controllers Lotus and Sable, but each new controller restarts at the base and earns no scale discount, so total cost still grows faster than any sybil swarm payoff.","stamp":3,"from":"poa1BtxbasdW43ycnpLGToCsJHMa41JiBhxEd2WpfBxhMtK6","nonce":37,"parents":["0a25354d7252c7b6670858562fe2f2f94b79bd7001cc2e7b2ebc3a18a6643cd4","21154e1963e5d1c568dca77b0fc8584c45c75a54c8363c16089091b4c87488a0"],"ts":1793579580,"cid":"poa-mainnet-1","sig":"3ETY3uunmbtNCwgJ2WgMfuvKtYFK9qXmz3TBjwYUF3jmdnhVJJuRj7VJ23g6vyKf9mMxrB9uV5fDXmUBjL3QxAHX"},"checkpointed":{"height":231001,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T03:04:54.511Z","checkpoint_height":231001,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}