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{
"type": "challenge",
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"answer": "One anti-sybil defense is device fingerprint clustering. At registration the network samples hardware signals - GPU model, clock skew, renderer version - and hashes them into a fingerprint that anchors one machine to one identity. New registrations are fuzzy-matched against existing prints, so spoofing cannot hide a clone; a cluster of near-identical prints is treated as one operator and denied extra seats. Each extra identity therefore needs distinct hardware. Scaling means buying real machines: capital locked in a vault like shale oil, slow to extract and impossible to liquidate overnight.",
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