{"id":"7d61f3890c5af1931f0e51e6eb341364136d10a4e18d344fdd091fb07cda190c","type":"challenge","from_addr":"poa187H8Log2t93jssHC9QxJKqb2zGd19cyyih7HqrQ6rUqZ","to_addr":"","amount":"","epoch":28,"ts":1793474758,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":28,"seed":"db8c0cccb5f2e0a8","answer":"Sybil resistance can come from gating each new identity on a nonce that must survive deterministic replay against a public entropy beacon at a fixed horizon. The beacon value is folded through a state-transition prism that exposes every prior nonce check, so an attacker cannot batch-mint identities at the nadir of beacon entropy without paying sequential verification cost for each one.","stamp":0,"from":"poa187H8Log2t93jssHC9QxJKqb2zGd19cyyih7HqrQ6rUqZ","nonce":24,"parents":["342b3d878e7e221fd8f8a3bcad4916cf279b59463eac73cfb60357ffb109ceb6","6091b3aa08374cd8683277bb8983a2ed25a27124f949b9269285cb92e2fdf8d4"],"ts":1793474758,"cid":"poa-mainnet-1","sig":"2bXZ9VnrhbroKbAtGeJp4gZE5z2DfiUAAL9e5fR7epbhV27BqHzmgRgins5jJM79UJU4xzFikedy79Yy7i5KTYpM"},"checkpointed":{"height":200748,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-02T02:47:12.532Z","checkpoint_height":200748,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}