What Is PGP Encryption? A Simple Guide For 2021

Ajay Ohri


Our society has become now widely reliant on computer interfaces and information technology solutions. In the forthcoming time 

Cyberattacks will become more destructive because our dependence on cyberspace raises. The evolution of more powerful malware has been marked as an indispensable need in the cybersecurity world. 

PGP encryption is one of the robust tools that protect your data, privacy, and security. 

This article will help you to apprehend briefly about pretty good privacy entirely.

  1. What is PGP?
  2. How do PGP works?
  3. How PGP encryption works
  4. How PGP decryption works
  5. PGP Keys
  6. What is PGP used for?
  7. What are the pros of PGP? 
  8. What are the cons of PGP?
  9. PGP encryption software

1. What is PGP?

Pretty Good Privacy or PGP is an encryption application that renders cryptographic privacy and authentication for the data connection. PGP is used for signing, encrypting, and decrypting texts, emails, files, and directories hindrances and also to strengthen the protection of mail communications.

2. How do PGP works?

PGP blends both standard and public-key cryptography. It is a mutated cryptosystem. When a user encrypts plaintext with PGP, in the beginning, it compresses the plaintext. Data compression protects modem transmission time and disk space and improves cryptographic security. Many cryptanalysis methods exploit patterns found in the plaintext to break the cypher. Compaction decreases these patterns in the plaintext by boosting resistance to cryptanalysis. Then it generates a session key, which is a one-time-only cryptographic key.

The key generated is a random number from the random movements of the mouse and the keystrokes. The session key works on a safer and fast standard encryption algorithm to encrypt the plaintext. It is called ciphertext. When the data has encrypted the session, the key is encrypted to the receiver’s public key.

This public key-encrypted session key is sent with the ciphertext to the receiver.

3. How PGP encryption works

The receiver replica uses the private key to redeem the volatile session key, which PGP then uses to decrypt the conventionally-encrypted ciphertext.

4. How PGP decryption works

The blend of the two encryption systems

 merge the convenience of public-key encryption with the speed of standard encryption. Standard encryption is around 1,000 times faster than public-key encryption. Public key encryption gives a solution to key distribution and data sending issues.

Through this, both functions work evenly, intending to protect data.

5. PGP Keys

A key is a value that works with a cryptographic algorithm to produce a specific ciphertext.

 PGP stores the keys in two folders on the hard disk, one for the public key and another for the private key. These files are called keyrings.

6. What is PGP used for?

Uses for PGP are as follows: 

  • Encrypting emails

Many users use PGP to transmit encrypted emails. Earlier it was used by the people who work with sensitive data.

Currently, the demand for PGP has risen rapidly. More number of users have switched to new methods of working. So much private information is shared through the information superhighway.

  • Digital Signature Verification

PGP is used for email verification. Digital signatures work on the algorithm to combine the sender’s key with the data they are sending to the receiver. It generates a “hash function,” another algorithm that can switch a message to a block of data that is of set size. It is then encrypted using the sender’s private key.

The receiver of the message can decrypt this data using the sender’s public key. Any changes made to the character in the transit, the receiver will get to know. It shows the sender is not the one who pretended off or attempted to forge a digital signature.

  • Encrypting Files

The use of PGP is to encrypt files. The algorithm used by PGP is ideally firm; PGP extends a remarkably protected way of encrypting files at rest, primarily when used alongside a Menace Detection and Response Solution. This algorithm is guarded that it has even used in robust malware such as the CryptoLocker malware.

7. What are the pros of PGP? 

  • It digitally consigns a private key to the email so that no one can modify the mail. 
  • It validates the sender’s identity to check for the originality of the sender. 
  • No one can decrypt the message send except the receiver since it can be encrypted through a public key and decrypt with a private key. Highly guarded in the current series of cryptography. 

8. What are the cons of PGP?

  • Slow in process time compared to traditional methods.
  • PGP encryption is not user-friendly. 
  • It is a complex technique. Other security systems use symmetric encryption that uses one key or asymmetric encryption that uses two different keys. PGP uses a heterogeneous way that implements symmetric encryption with two keys. It is more complicated, and it is less well-known than the conventional symmetric or asymmetric systems.

9. PGP encryption software

You can download any of the softwareThere is multiple software available, can choose according to the need.

OpenPGP is the extensively used email encryption pattern. It is used for encrypted messaging and other use events such as password managers. It is open for all important platforms, such as Windows, Mac OS, GNU/Linux, Android, and iOS.


Encrypting your data is a necessity these days to protect your data from cyber-attacks. Encryption software based on PGP is one of the easiest to work with. You do not have to be a computer whiz to encrypt your emails and data, significantly growing your virtual security.

So, have you made up your mind to make a career in Cyber Security? Visit our Master Certificate in Cyber Security (Red Team) for further help. It is the first program in offensive technologies in India and allows learners to practice in a real-time simulated ecosystem, that will give them an edge in this competitive world.



Related Articles

Please wait while your application is being created.
Request Callback