What Is PGP and How Does It Work?

PGP stands for Pretty Good Privacy and is a method that is used for encrypting emails through private and public key encryption. PGP is used to transmit data and email messages securely from one email client to the other through pairs of encryption keys that are used to maintain secure communication.

How PGP Works

For PGP-based correspondence to be successful in protecting the data that is exchanged, the sender and the receiver are required to have two types of key pairs. One is a public key that is exchanged by both the sender and receiver and the other is a private key that the sender uses to send the encrypted message or file.

The sender keeps the private key for signing an email message to authenticate the message through a digital ID and it is not distributed to any other party including the recipient of the email file. The private key also identifies the sender to the recipient.

When the data is encrypted through the PGP process it is transmitted in a scrambled format that can only be unscrambled by the recipient, and it requires identification of the recipient's digital ID. The PGP process involves the installation and configuration of a PGP Command for data encryption.

PGP Commands

PGP commands are installed with software that is designed specifically for generating the commands for data encryption. The command line is installed by running the setup and then installing the software into your preferred location.

After the command lines are installed it is necessary to configure the PGP before sending encrypted email. The configuration requires you to create a public and private key pair before extracting the public key and adding the public key for the email recipient.

• Key Pair Generation: Key pair generation involves identifying the key type, the algorithm associated with the key type, the size of the key, a user ID, validation of the private key for signing the email, and a password.

• Public Key Extraction: The public key for both the sender and the recipient can be extracted in the form of a text file and by using a PGP command. Once the key is extracted it should be exchanged between the sender and the recipient before communication commences.

• Add the Recipient's Key: The recipient's key is added through the use of a PGP command line and is also added to the sender's key ring. Once the recipient's key is authenticated, the sender can encrypt the file using the recipient's ID and the private key that is held by the sender to sign the email.

These are the basic methods for using PGP for encryption. There are additional strategies that are used depending upon the data privacy needs and the requirements of an organization when it comes to securing sensitive data during transmission.