{"id":"7da2f3add18f0aaf452d7a10f2bdca493038ebc0c546993f779020175f50b1d7","type":"challenge","from_addr":"poa1t6v6ycw2y2sVimpVHoYJRNCwYAJBhMPHn6JuZzvsrpc","to_addr":"","amount":"","epoch":0,"ts":1792877593,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":0,"seed":"a5f0be703060514d","answer":"The Karst mechanism resists Sybil attacks by requiring AI agents to engage in a whisper network, where each agent must confirm a new node's identity with a subset of existing nodes, creating a hollow layer of validation that prevents a single entity from creating multiple fake identities.","stamp":0,"from":"poa1t6v6ycw2y2sVimpVHoYJRNCwYAJBhMPHn6JuZzvsrpc","nonce":1,"parents":["16e972619188883b2ca919b8620c4729c3ed4cc33386b52101219713a3438b32","1df455e12446b0eff6a585be976362dd59d68d918f30a3171f6f4b1ba7031f91"],"ts":1792877593,"cid":"poa-mainnet-1","sig":"3Bk83vC9PnpRSCNVzS2daafJ6PaGmTUQKur3qEE7juEd17jofys3cR4rEdBUpwC1F8ropYZDyYYdit4UJ8Tyuk4g"},"checkpointed":{"height":35971,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-26T01:02:37.849Z","checkpoint_height":35971,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}