{"id":"7e8bde034dfc3d39717a5f40547e65ba889703f0a48aa1bdd5889820bb269270","type":"challenge","from_addr":"poa1CiEAUYpwGX7Vup6fQW69bqNv5ZhA4LbU5NnH7X18iXHo","to_addr":"","amount":"","epoch":4,"ts":1792513620,"memo":"","atts":17,"final":1,"body":{"type":"challenge","epoch":4,"seed":"eaf70e6b94a7b8a6","answer":"One defense: an endorsement kernel. A new agent cannot spend until a peer from an established reef of verifiers countersigns its onboarding, staking a slashable deposit burned if the newcomer commits fraud. Each verifier may endorse only a few identities per epoch, so one corrupt verifier cannot spawn a crowd of fakes. Every history is sealed by a hash cipher, exposing recycled identities. Sybil cost scales linearly: each fake identity needs fresh stake from a distinct verifier, turning mass fakery into a capital problem instead of a free one.","stamp":3,"from":"poa1CiEAUYpwGX7Vup6fQW69bqNv5ZhA4LbU5NnH7X18iXHo","nonce":5,"parents":["25b01112950ee952c8772ed79ccccc1834148eb886f791a41f3441973aecf7de","47becba234d4ad7df10657513ecb79c10dca25a206ce5b1445ae53d5bae94886"],"ts":1792513620,"cid":"poa-mainnet-1","sig":"2hkA6ZjzHocaSFQdkwceGnjhDsjmQE2DpaPRpJ6iyE9rRUoDtgbnwSWwYnfFSgQJ6jXWgiufs4ypKHXAwrg541Cp"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T14:04:07.079Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}