If you are in need of solid encryption but want to steer clear of the mainstream, then GnuPG is for you. In this Daily Feature, Jack Wallen, Jr., explains how to install GnuPG and its basic features.

If I've downloaded something from a first party website (e.g. the main gnupg project website) OR a highly trusted third party (like, for example, a well known Linux distro site like debian, ubuntu, ...