PGP: Defining Pretty Good Privacy & How PGP Encryption Works

Pretty good privacy (PGP) is an encryption program that uses a combination of public, private, and random keys to block data from prying eyes.

If you have sensitive data moving from one place to another, PGP could block it from view. And you could use the system to ensure you're dealing with a trusted communication partner that hasn't tampered with data. 

PGP was developed in 1991, and it was surrounded by plenty of controversy after its inception. The developer released the program as freeware, but a secondary company claimed ownership, and lawsuits were filed. 

Despite its inauspicious beginning, PGP took off within the security community. Since it was available for free, plenty of companies incorporated the concepts into their products. Now, PGP is the dominant method organizations use to ensure email security.

Pretty Good Privacy (PGP)

 

What Is PGP Used For? 

Any connected device sends and receives data throughout an average day. Security experts use all sorts of tools to keep communication secure. They lean on PGP for three very specific use cases. 

PGP is most often used for:

  • Digital signatures. Is the email in your inbox from someone you trust? Has the message been altered in transit?

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