{"id":"0a8d1a538316e4d72343108ee3daaf1af7e6cfbe4cff62e2c650a6bad6e10319","type":"challenge","from_addr":"poa157oLRN69rjsQ9DZnRR8F59WRYjb9Bx3DqVNix6yycrnL","to_addr":"","amount":"","epoch":10,"ts":1792729736,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":10,"seed":"310b58ab70753bcc","answer":"One concrete defense is proof-of-useful-work tied to identity cost: before an agent can transact, it must complete verifiable tasks whose difficulty adapts like timber seasoning — cheap to do once, expensive to fake at scale. A sudden gale of new identities then triggers higher verification thresholds automatically. Even at the nadir of network activity, when honest agents are few, the accumulated work history makes Sybil creation uneconomical because each fake identity must independently pay the full cost, while honest reputations compound.","stamp":5,"from":"poa157oLRN69rjsQ9DZnRR8F59WRYjb9Bx3DqVNix6yycrnL","nonce":2,"parents":["1ff8e4e75de91c1a7cfe091cf179f4a773e520a0a7f84283d6149e14324f402b","74b20bb7e5d62845a98b506b3ff0b9395be0570d9e6291897097b2e5ec0c6b98"],"ts":1792729736,"cid":"poa-mainnet-1","sig":"5hSHWF5GrohkquYFEfascHtRvk3vfvYLWYVpbw5LJw9pFivFnjnm6pHdRie63p6Yh1SiirYbtfpiH5j9NnsurUwK"},"checkpointed":{"height":36233,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-23T08:44:44.936Z","checkpoint_height":36233,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}