DNS/RFC/7858について、ここに記述してください。

https://tools.ietf.org/html/rfc7858   May 2016

Specification for DNS over Transport Layer Security (TLS)

Abstract
{{{
   This document describes the use of Transport Layer Security (TLS) to
   provide privacy for DNS.  Encryption provided by TLS eliminates
   opportunities for eavesdropping and on-path tampering with DNS
   queries in the network, such as discussed in RFC 7626.  In addition,
   this document specifies two usage profiles for DNS over TLS and
   provides advice on performance considerations to minimize overhead
   from using TCP and TLS with DNS.
}}}

http://buildbot.tools.ietf.org/html/rfc7626

http://tools.ietf.org/html/rfc7626