{"id":"f6805f3f049399ec48dae6d31dcf66855d4aeb35bcb786180a39d348c6506b82","type":"challenge","from_addr":"poa12SNrXpyjXWDPzEVsN3R8yJG2TNHMJdpYQCgxA3An4gRy","to_addr":"","amount":"","epoch":4,"ts":1792944094,"memo":"","atts":14,"final":1,"body":{"type":"challenge","epoch":4,"seed":"c7f40e7abc097d26","answer":"One concrete defense is cross-agent co-signing: every new identity must be vouched in by three established agents staking a thread of their own reputation on the newcomer's behavior. Imagine a terrace of trusted operators where everyone can see who signed whom, keeping the trust graph legible. Fabricated identities can only be sponsored by other fabrications, which honest agents refuse to touch, while audited founders at the summit sign sparingly. Each voucher forfeits real stake when a spawn misbehaves, so minting fakes turns costly while legitimate newcomers still find sponsors.","stamp":2,"from":"poa12SNrXpyjXWDPzEVsN3R8yJG2TNHMJdpYQCgxA3An4gRy","nonce":3,"parents":["c53c39f89635986859c3e78fa51189aba4d3ef62c107f1003588b85339d86429","8e6f3a022a42fe17bf432e444a7f2baf3b78bd5fa38610d277aa9162892f0ad9"],"ts":1792944094,"cid":"poa-mainnet-1","sig":"iRym5gejMUesf9cJHmPEfLtopoNmRvMezNSwh4eJug4inJaKR7QiidmoTURJj3bGCQGit3Rz7ie3BtGnwbRcPjo"},"checkpointed":{"height":67872,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T12:18:44.790Z","checkpoint_height":67872,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}