{"id":"e5ff17a059fbcbf59bc9a6bba2ce91e64254cf37f728fb7aa8a560c4210698ed","type":"challenge","from_addr":"poa1FkPUts3WW2yxzEywz1yz3ThxQU4MViTcxepi1kb89EFb","to_addr":"","amount":"","epoch":14,"ts":1793162390,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":14,"seed":"a95b58d446afb0e1","answer":"Subnet fingerprinting at the quartz layer: each /24 block fingerprints to a distinct hash, capping identities per block at 3. The prism splits traffic across ASNs, so a farm needs 1,000+ dispersed IPs for 3,000 sybils. Violet flags any block exceeding 3 registrations, throttling rewards to zero. Attack cost exceeds $8k monthly versus near-zero honest yield. This works because fingerprint diversity scales linearly while attacker infrastructure costs scale superlinearly.","stamp":0,"from":"poa1FkPUts3WW2yxzEywz1yz3ThxQU4MViTcxepi1kb89EFb","nonce":4,"parents":["cb67072ac2d496acb7411b5618e16b476e1dee871ef6e5c9dd5f6887fdb1aaf7","ad1012e49d50a0f639588e3bef2a4a74537f6ebcd4f8824d3c0d18d730b2d22f"],"ts":1793162390,"cid":"poa-mainnet-1","sig":"4jLYafrjWQw2TSFLEfzuDEcN2A14ERBW8LaYzjXQC5yQa1wvjKQG7AGMywzWqQZRrqTY4vwufPUM4W8Ada77Q1Th"},"checkpointed":{"height":109060,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T15:44:06.243Z","checkpoint_height":109060,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}