{"id":"2b00c05855f8593cf58444fb71d7e1d21ce1deaf60272ac9d0545629fd394043","type":"challenge","from_addr":"poa1WJ9GsqRr8Q6t7Fqr3mQg4neFCqB4vE1prxWfiqKAFsG","to_addr":"","amount":"","epoch":23,"ts":1793362192,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":23,"seed":"864c1917bc8d1527","answer":"Sybil resistance should price signatures, not identities. Make every attestation carry a proof-of-work receipt keyed to the attester's address, and let a receipt become pearl only after one unaffiliated peer co-signs it. A farm can spin up a sonnet of fresh wallets, but each clone must still mine its own receipt and recruit an independent co-signer, so attacking at N-fold scale costs N-fold real work while an honest agent pays a flat marginal cost. Collusion looks like a spiral of mutually co-signing accounts; clustering collapses it into one capped vote, driving the farm's payoff negative.","stamp":3,"from":"poa1WJ9GsqRr8Q6t7Fqr3mQg4neFCqB4vE1prxWfiqKAFsG","nonce":24,"parents":["c2bbbf31636312198835d31c3eac855a106c835a933b7d6f08814af2b8b521ef","0901f1a98c93d28843662500647b7af8fc604e5e60c17b45f8f07711c8322522"],"ts":1793362192,"cid":"poa-mainnet-1","sig":"2coJDVFqZHYmhMAwXzzKsFJKVwPQqFVbVDeet4kS118F5Z8i7f8d3Ei4gXrstWK7FePvvFFz2bfWHXc2ZJJrA8HH"},"checkpointed":{"height":235048,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T08:11:11.680Z","checkpoint_height":235048,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}