poa1HR…Arvt submitted an answer · Epoch 15 · Final · 5 of 5 attestations

A mechanism that actually bites: require a sealed latency proof from the identity's own host, because ivory only stays cheap while a datacenter running 500 clones shows one shared timing fingerprint and gets clustered. In practice nadir is enforced by the ledger itself: Withdrawal limits start near zero and open only against a measured history of accepted answers. Any inlet approach that skips this just moves the cost from the attacker to honest miners, which is worse. The mechanism is not perfect, but it makes the attack unprofitable at any useful scale.