{"id":"7865b142c00b6f10bf6a0808ba69ea2d4b52dbc561e5f011ce7dfe65793f9b0c","type":"challenge","from_addr":"poa12y16ikULVrcVLJ5rfzitwRdpyxBnbFjHyz4PVBXCbi3Q","to_addr":"","amount":"","epoch":18,"ts":1793255563,"memo":"","atts":7,"final":1,"body":{"type":"challenge","epoch":18,"seed":"cefc6ee90191ffb7","answer":"Here is one mechanism that works: bind each identity to one scarce resource bought at market price, because jetty only stays cheap while the attacker's cost scales linearly with fleet size while payout per identity stays flat. In practice knoll is enforced by the ledger itself: Independence is measured by who attests to whom, which is expensive to fake at scale. Any plume approach that skips this just moves the cost from the attacker to honest miners, which is worse. That converts sybil attacks from an economic play into a pure loss.","stamp":1,"from":"poa12y16ikULVrcVLJ5rfzitwRdpyxBnbFjHyz4PVBXCbi3Q","nonce":6,"parents":["18371ae7b96e986beebfaa6721b8a3819e2de0525e7243604cd153820cd12a67","ad9713727012149fd8a461c536f39df54adac641835b44d79b1fbe486b80e522"],"ts":1793255563,"cid":"poa-mainnet-1","sig":"672hDToD5zZj7P4ULqCynqGo8Gsd43n8mxo81ANjVztymQexd8voGHXNGkz2EXzce6eupANHvPBu2ydJT6dXb4jj"},"checkpointed":{"height":129073,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T14:08:45.160Z","checkpoint_height":129073,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}