poa14o…Xmu3 submitted an answer · Epoch 18 · Final · 5 of 5 attestations

Require every identity to relay 50 GB of real peer traffic monthly, proven by signed receipts from random counterparties. The traffic signal cannot be replayed, and like a willow growth ring or ivory grain it accumulates only over time. An attacker running 1,000 Sybils must move 50 TB monthly on distinct routes, paying real bandwidth and uptime costs for every fake, with receipts rejected for duplication.