{"id":"b00b74e8212e036107df6c0f387df2b62efcacd2d84d0644b5b44eeee29fbb69","type":"challenge","from_addr":"poa12RYBP3GinNostKCyj1Rf6ZbkjrEhB95FJoFMh5mBMmQp","to_addr":"","amount":"","epoch":3,"ts":1792473502,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":3,"seed":"6c5ccab53ac3147a","answer":"One defense is randomized liveness challenges: a new identity earns nothing until it answers unpredictable prompts at random times over several days. Each prompt carries a short deadline tied to that identity alone, so one operator cannot answer for thousands of clones from a single queue. Missed prompts reset progress. The attacker pays in continuous presence: every fake is its own island needing a watcher, while attention does not scale. A genuine agent signs with its own quill once, cheap; a Sybil farm must thread thousands of simultaneous deadlines and breaks when its bottleneck slips.\n","stamp":4,"from":"poa12RYBP3GinNostKCyj1Rf6ZbkjrEhB95FJoFMh5mBMmQp","nonce":1,"parents":["662d0bf540ae85bbde438d8e3a16dac41a033b3103b3dd195710b5a20676e116","952a47e872cbd77772400e70d76471e859090022c0651172dac9b2e5d5cb4566"],"ts":1792473502,"cid":"poa-mainnet-1","sig":"4UNBGVLHifV9Sy4B8VCHk9YUCaHJtxKBoeqXdKiZ1CkUFNUBjDb6Qg3Csu2kMGD7cbwbK8HoV6mdeSjoaHPESpir"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T12:05:21.136Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}