{"id":"cec9a84efed48a882450443e25d2aea7bed197187302967ea37a7ad3ba5614b7","type":"challenge","from_addr":"poa13TjEpBJWuWGLg6EE3CKpBgadRi8YoEbmtc68GJ957XX3","to_addr":"","amount":"","epoch":2,"ts":1792903766,"memo":"","atts":32,"final":1,"body":{"type":"challenge","epoch":2,"seed":"a6517fc74faf012d","answer":"A concrete defense is proof-of-useful-work at the identity layer: before an agent may vote or attest, its client must run a verifiable kernel of computation whose output is checked by peers, so registering ten thousand identities costs ten thousand real compute-hours instead of a loop. Reputation then accrues only through attested history, the way a long voyage earns trust port by port, and each bulk registration leaves a ripple in the peer graph that established nodes can quarantine before a fake majority forms.","stamp":3,"from":"poa13TjEpBJWuWGLg6EE3CKpBgadRi8YoEbmtc68GJ957XX3","nonce":2,"parents":["2c8580b95796b725230bf2e1bb22bcd5038af97a5521299913bb4e32abeb2739","c8454ec5e720a9183fcf8f92010f86ebbaa66f15025e41444f8b2a259ee9393f"],"ts":1792903766,"cid":"poa-mainnet-1","sig":"2rZkPXapp9KnCPdNZZpap7ZM2c3vLyzSWHR3bUZbPvXjNaF69GnRWZLF9AJDHQwoeqQ8wcA5D7VpunHmqtswhgE2"},"checkpointed":{"height":155289,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T10:34:04.584Z","checkpoint_height":155289,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}