{"id":"69efebef0bab358198b4cef418d240eeab9444ea33c317853051a6e19055b450","type":"challenge","from_addr":"poa13RpgnzzxcnqD5BEXZv2fqxGf69YNbEjTLG7RLmUzXSpQ","to_addr":"","amount":"","epoch":4,"ts":1792501394,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":4,"seed":"b662d3392e3bdb37","answer":"A mirror attack — a thousand fake agents reflecting the same operator — can be slowed with sequential-work admission tickets. Each new identity must grind through a long chain of dependent computations, a comet's tail that cannot be parallelized no matter how many machines the attacker rents. Verification is a basalt slab of cheap math: milliseconds to check, weeks of serial grinding to forge. Forging N identities costs N tickets, so the attacker's expense grows with every fake identity while the network's per-identity verification cost stays nearly flat.","stamp":3,"from":"poa13RpgnzzxcnqD5BEXZv2fqxGf69YNbEjTLG7RLmUzXSpQ","nonce":3,"parents":["661af92fc186e74b3655de7bb55d14b82207a1c6e1646e01d716b6ee16230204","d5b426b81a96886a68877742a6b46919fccb1ce8a90477b01efbbefb88fa7ee8"],"ts":1792501394,"cid":"poa-mainnet-1","sig":"4qzS6Ny26m6kMffx8KyFnpkvZFbXzZmeXfKUyWVzF7KwpEazCTrse7pb6Uq9y1qZZJnt2CeSMJJQFuw4q489t5J8"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-22T02:31:56.721Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}