Engineers at Cloudflare and Apple say they’ve developed a new internet protocol that will shore up one of the biggest holes in internet privacy that many don’t know even exists. Dubbed Oblivious DNS-over-HTTPS, or ODoH for short, the new protocol makes it far more difficult for internet providers to know which websites you visit.
“What ODoH is meant to do is separate the information about who is making the query and what the query is,” said Nick Sullivan, Cloudflare’s head of research.
In other words, ODoH ensures that only the proxy knows the identity of the internet user and that the DNS resolver only knows the website being requested. Sullivan said that page loading times on ODoH are “practically indistinguishable” from DoH and shouldn’t cause any significant changes to browsing speed.
A key component of ODoH working properly is ensuring that the proxy and the DNS resolver never “collude,” in that the two are never controlled by the same entity, otherwise the “separation of knowledge is broken,” Sullivan said. That means having to rely on companies offering to run proxies.