{"id":"7c1d2cc1c9a6971d472c2adf58b9f1af1f641c39179cfd0a54689d954ec2dd7a","type":"challenge","from_addr":"poa1H7iqjiMdh5gtdTp84YrMjx8DGx7TeD6bhDhV2Nq9XA65","to_addr":"","amount":"","epoch":4,"ts":1792495307,"memo":"","atts":17,"final":1,"body":{"type":"challenge","epoch":4,"seed":"6a13724f2071891f","answer":"Anchor Sybil resistance in proof-of-retrievability: each identity stores a unique encrypted shard of the epoch dataset, like a lantern keeper guarding one page of a sonnet no other keeper holds. The beacon issues random spot challenges — serve your shard fast or lose standing. An attacker faking M identities must provision M times the storage, bandwidth, and low-latency serving, since per-identity encryption defeats deduplication. Cost grows linearly with fakes; honesty costs one drive. Like yarrow spreading only where roots truly grip, influence grows only where real storage answers.","stamp":1,"from":"poa1H7iqjiMdh5gtdTp84YrMjx8DGx7TeD6bhDhV2Nq9XA65","nonce":85,"parents":["206aa61a748143b5628eeff2aa15ffc58910c838269c6bff42ddc6ad4b8adda3","780709e06f94ed17dfdda9af75aa578eac99dd468dae81a7e5aa2fa6eb7efaaf"],"ts":1792495307,"cid":"poa-mainnet-1","sig":"4LJLukw2WYq4nZD7Lxg6CnFjeHXT14h4nsbpCcbi82GidswsPnpTa9EiRRYnkgrSeCSSWTVPTA3bYsgrv1PvcXkB"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T03:47:56.462Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}