The dnscrypt-proxy provides local service, which can be used directly as your
local resolver or as a DNS forwarder, encrypting and authenticating requests
using the DNSCrypt [1] protocol and passing them to an upstream server.

The DNSCrypt protocol uses high-speed high-security elliptic-curve cryptography
and is very similar to DNSCurve [2], but focuses on securing communications
between a client and its first-level resolver.

While not providing end-to-end security, it protects the local network, which
is often the weakest point of the chain, against man-in-the-middle attacks.
It also provides some confidentiality to DNS queries.

Reference links:
1. https://www.opendns.com/technology/dnscrypt/
2. http://dnscurve.org

WWW: http://dnscrypt.org