|PGP (Pretty Good Privacy) is a data encryption and decryption program that provides cryptographic privacy and authentication for data communication. PGP is often used for signing, encrypting, and decrypting texts, e-mails, files, directories and whole disks.
PGP is mostly used to send messages confidentially. Basically, each individual has a unique PGP key (consisting of a 'public' and 'private' key). You import peoples unique 'public' key to your list of keys. When you go to write a PGP message, you type it normally and then before encrypting, you pick a persons unique key to encrypt to, where ONLY that person can read it using their 'private' key to decrypt it.This is why people give their public keys out, so anyone can encrypt them a message.
Links to download encryption software for both Windows and Linux can be found on my here
Download my public PGP key here or scan the QR code shown