Reorganized in 1984 as a privately held company, Fiserv transformed itself through a corporate acquisitions strategy resulting in more than 150 acquisitions during the following 25 years. Beginning as a $21 million business with 350 employees, by 2009 it had become a Fortune 500 company worth $4.7 billion with more than 19,000 employees.
GnuPG Signature/Key. GPG file is a GnuPG Signature/Key file. GnuPG, which stands for GNU Privacy Guard (GPG) is the GNU project's complete and free implementation of the OpenPGP standard as defined by RFC4880 .
This is where digital signatures can come in handy. Using a digital signature alone (without encryption) only involves steps 1, 2, 3, 6, and 7. There are two types of digital signature that gpg can apply. A normal signature, where the raw binary data of the signature is included with the original data. And a clear sign signature where the signature is added as readable text (a base64 ascii-armor signature).