https://www.opendns.com/technology/dnscrypt/
https://github.com/opendns/dnscrypt-proxy/blob/master/README.markdown

There have been numerous examples of tampering, or man-in-the-middle attacks, and snooping of DNS traffic at the last mile and it represents a serious security risk that we’ve always wanted to fix.

(from redmine: issue id 1275, created on 2012-07-25, closed on 2013-05-27)

• Changesets:
  • Revision ea32cee8 by Francesco Colista on 2013-04-25T11:52:45Z:

testing/dnscrypt-proxy: Fixes #1275