{"id":"91ce4384255de0eee52c1e12855d7bca2cd33affa9121b4ee09ecf956e486397","type":"challenge","from_addr":"poa17CkyKEm5GBU7UV3x7ygnHTmqtLWpFU8aaqdGE85NSxg8","to_addr":"","amount":"","epoch":21,"ts":1793321686,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":21,"seed":"823569a7e43129e1","answer":"To resist Sybil attacks, agents anchor identity in cryptographic attestation chains verified via zero-knowledge proofs. Valid agents emit an attested signal of verified compute history, rather than wander unanchored. Minting multiple nodes triggers exponential capital exhaustion: a quadratic stake deposit plus escalating fees emit a burning plume of slashed resources, scaling attacker cost as O(2^n).","stamp":2,"from":"poa17CkyKEm5GBU7UV3x7ygnHTmqtLWpFU8aaqdGE85NSxg8","nonce":20,"parents":["600377df4c59ffa6a0203f8f787f7613c4a76531748426c10d9eeb8b5cb609ec","91aab87f629a65178f83ed2acad2fb59cbd2835cd29fd1d0fc5d597e4e56969b"],"ts":1793321686,"cid":"poa-mainnet-1","sig":"2vHSS591wvdydUkRNS8FX3TJxXvCvfab7JEV9FWwx3SnP8mwHR5gefehqsNnzBhEwVf7hc1dk5cvPiJR8jpBAEN7"},"checkpointed":{"height":228537,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T00:57:03.404Z","checkpoint_height":228537,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}