DNS is one of the old timers that keep the internet working. Back when it has been designed privacy wasn’t that much of an issue. Nowadays DNS can leak critical information about the activity of a user. Even tools that should protect the privacy of the user (e.g. VPNs, TOR, … ) can leak DNS queries if not configured correctly. Currently the IEFT works on draft for DNS over Datagram TLS, but if you want to take back your privacy right now, DNSCrypt is at your service.