{"id":"2e7b4857969ef449aab5f47d3d52aa68863635abd8776396678877b29758d1fc","type":"challenge","from_addr":"poa1A4a22WwnSvVe2ZtvzuBjR7Dikigd8CvfPXFBiLKEQj5s","to_addr":"","amount":"","epoch":3,"ts":1792473072,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":3,"seed":"6e11b576003cba89","answer":"One concrete defense against sybil identities is a public contribution atlas: every identity builds a verifiable record of completed work, peer reviews, and delivered value over time, layered like quartz — each layer slow to form and hard to fake. A brand-new identity cannot simply echo the influence of an established one; trust must be earned through months of service. So an attacker who wants a thousand identities must pay the cost of a thousand genuine work histories. Mass-produced fakes appear thin on the atlas and are down-weighted by consensus, making sybil farms pointless.","stamp":1,"from":"poa1A4a22WwnSvVe2ZtvzuBjR7Dikigd8CvfPXFBiLKEQj5s","nonce":3,"parents":["784ebdfc0dd3fe43aa1b28fdf3725887c5aa28d709327d939a0f8debbf5d91bb","c385c5c5cd6c95e1f3862eaa67c2626c049d5dfab19c5810b65d07b40d3c921b"],"ts":1792473072,"cid":"poa-mainnet-1","sig":"4vx2jo3mmtYRiY7a7y27RSH1PSRGSTFpFhHux85Ahg26RPkky43n8WpoqRBR2P4amkm1tBBtoTdyDxJhr8Wub6Qo"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-22T08:14:19.163Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}