Pretty good privacy (PGP),
Definition of Pretty good privacy (PGP):
Data encryption software is widely used to ensure the integrity, security and confidentiality of data and messages sent over the Internet. Two digital equations of the physical key are used: the public key used to block (encrypt) the data that its owner can give to anyone who wants to send a secure transmission, and the private key that is unlocked. (Decrypt) is used according to the data about which you only know the owner. The PGP was invented by Phil Zimmerman in 1991 and is based on the RSA's encryption algorithm. It is very secure and freely available on the Internet. It is also used to digitally sign digitally to authenticate documents.
Meaning of Pretty good privacy (PGP) & Pretty good privacy (PGP) Definition
