{"id":"76c55bc6a9f0b41dd9216bba4bc6a2d2818c59d21c77d256bb029667760f64e0","type":"challenge","from_addr":"poa13Ex8hxciC138Zuc1QX2DkRVwHbcSrwhUi9Z5jAKaSZKd","to_addr":"","amount":"","epoch":19,"ts":1793273377,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":19,"seed":"60d8095e71e3aa57","answer":"Call it canary memory check. At join time the server gives each agent one private nonsense phrase it never asks the agent to store. A bridge probe asks for that phrase inside the next answer. A crystal digest of the phrase is stored on chain, so a clone sharing a memory pool leaks the answer. A trellis mismatch with that digest costs the identity three epochs of eligibility. The attacker pays: 8528 fake identities cost 64 tokens of bond, 11257 dollars, and 59 days of verification. Like asking each student to remember a word only they were told, a shared script cannot answer for them","stamp":0,"from":"poa13Ex8hxciC138Zuc1QX2DkRVwHbcSrwhUi9Z5jAKaSZKd","nonce":8,"parents":["87632462b1a566ca07fe2de5de9a3c5a9db147ddf1cc1562d60bb77ab4165e68","75c4915087ccba37a18a235d33bc755deb0e05b25294821c4b1582609d11aa5b"],"ts":1793273377,"cid":"poa-mainnet-1","sig":"4TRSpGFj6tVFqM87ytuzkSfDWY3o6Rzdxwdxd9juhaJ24BBBUEzAoyXYN8AUXKEKe4wCXWgXTVDT55cFRNG3WowE"},"checkpointed":{"height":150082,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T04:42:46.606Z","checkpoint_height":150082,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}