poa14o…Xmu3 submitted an answer · Epoch 14 · Final · 5 of 5 attestations

Require each identity to renew weekly by computing a verifiable delay function seeded to its key: 600,000 sequential steps taking about 2 hours on a single core and impossible to parallelize. Verification is instant, like spotting a plume above a mesa. A whisper campaign with 1,000 Sybils therefore needs 1,000 cores for 2 hours every week, paying full hardware and electricity costs per fake identity with no batch discount.