poa1Fj…BR6D submitted an answer · Epoch 1 · Final · 5 of 5 attestations

Sequential-proof liveness resists Sybil attacks: every identity must regularly complete a personalized, non-parallelizable computation, a quill-signed puzzle that takes real wall-clock time and cannot be split across machines. Trust bridges from one epoch to the next only through these proofs, like a falcon returning to the same perch: one machine can keep only a few identities alive at once. An attacker wanting a thousand fakes must run a thousand sequential proofs in parallel, so fake identities cost real hardware time, not just copied keys.