This document defines a parameter that can be included in Service Binding (SVCB) and HTTPS DNS resource records to denote that a service is accessible using Oblivious HTTP, by offering an Oblivious Gateway Resource through which to access the target. This document also defines a mechanism for learning the key configuration of the discovered Oblivious Gateway Resource.

This document sets out steps that DNS servers (recursive resolvers and authoritative servers) can take unilaterally (without any coordination with other peers) to defend DNS query privacy against a passive network monitor. The protections provided by the guidance in this document can be defeated by an active attacker, but they should be simpler and less risky to deploy than more powerful defenses. The goal of this document is to simplify and speed up deployment of opportunistic encrypted transport in the recursive-to-authoritative hop of the DNS ecosystem. Wider easy deployment of the underlying encrypted transport on an opportunistic basis may facilitate the future specification of stronger cryptographic protections against more-powerful attacks.

【特集】AIのリスクと可能性