Using PGP to Verify Digital Signatures
Source: Linux Security
A nice article that describes how to use PGP to verify the signature of a program before installing it. "PGP stands for Pretty Good Privacy. It is a computer program that uses mathematical algorithms to encrypt files and protect them from unauthorized access. It is also used to digitally sign and verify documents. Versions of the PGP program are available for most popular computer operating systems Microsoft Windows, MacOS, and UNIX, to name a few.