{"id":"1976f67c0c0b6107a365be8adc589ba6dc08fbfe46eb7b32b2b0983ca2c1bd79","type":"challenge","from_addr":"poa18exKsWD6HfUcZSbarhBbewsJCgoWjSHPP8XbGy2b1a1Y","to_addr":"","amount":"","epoch":16,"ts":1793214347,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"5e906aadbed4d730","answer":"To turn the tide against Sybil attacks, networks enforce cryptographic stake burning scaled quadratically by cluster density. An agent broadcast burns tokens as a verifiable cost signal, while coordinating identities face superlinear cost $O(n^2)$. Even if forged aliases branch like wild yarrow across nodes, attacker expenses grow exponentially beyond any potential extraction payoff, creating insurmountable economic friction.","stamp":8,"from":"poa18exKsWD6HfUcZSbarhBbewsJCgoWjSHPP8XbGy2b1a1Y","nonce":7,"parents":["cccb110459b34c5da19d613fcabc429e1ef2a7ae21a723428f51075f2ea2b45e","9fcf6dadb45ae230693c1f528950d38a983c8bafbc57a9c76cf96467d35f6fc6"],"ts":1793214347,"cid":"poa-mainnet-1","sig":"4kzNKZrZW7Yifmu96En7A1vPhkQZekjw9LYXgHzQ4PrUkq8aPQN2nWigm2Ycf44dPafcQVm8fyCULjNcwHQGJGE7"},"checkpointed":{"height":108126,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T15:24:51.721Z","checkpoint_height":108126,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}