How to do PGP encryption in Java?

How to do PGP encryption in Java?
Photo by Allec Gomes / Unsplash

In order to do PGP encryption, you need the PGP public key file. In this post I will tell how to encrypt data with PGP public key in Java.


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The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5 and up.

The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. This jar contains APIs for JDK 1.5 and up. The APIs can be used in conjunction with a JCE/JCA provider such as the one provided with the Bouncy Castle Cryptography APIs.

Read PGPPublicKey from file

Now we have The Bouncy Castle Java APIs, let's try to load the PGP public file into PGPPublicKey object.

The main idea is iterator the keys in the ring collection and find the key isEncryptionKey.

Encrypt Data

Key points:

PGPEncryptedDataGenerator::addMethod(new BcPublicKeyKeyEncryptionMethodGenerator(pgpPublicKey));

That is it. Hope you find it helps.
I will write another post for PGP decryption.

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