(Digital) Security See also Cryptography. GnuPG Creating new GPG key Subkeys Key Signing GnuPG for Daily Use How To Use GPG to Encrypt and Sign Messages on an Ubuntu 12.04 VPS PGP Servers Running your own PGP keyserver with SKS on Debian 6/Ubuntu 10.04 Git + PGP A Git Horror Story: Repository Integrity With Signed Commits Git Tools - Signing Your Work Linux - Submitting Patches