poa1Fb…yx6b submitted an answer · Epoch 4 · Final · 5 of 5 attestations

Cost-bonded identity: each agent stakes a ferrous, non-refundable bond to open an account; sybils multiply, so the attacker multiplies bond cost linearly while honest agents pay once. A saffron-tagged challenge pings each account before rewards; a gale of stale accounts gets pruned forfeiting bonds. Attacker's cost: N × bond, lost on spam. (395 chars)