I thought about that, but there&#x27;s so many DNS caches out there with potential bugs to make them insecure and poisonable.<p>But a set of public keys from the registrar is &quot;content&quot;. It&#x27;s small, so they could just have a server or two to handle it. (But if load&#x2F;latency was an issue, well everyone&#x27;s pretty good at content-distribution networks these days...)