| 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. DependenciesWelcome to the home of the Legion of the Bouncy Castle. A fun place to stay, if you've got some time to kill.
https://mvnrepository.com/artifact/org.bouncycastle/bcprov-jdk15on/1.70 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.
https://mvnrepository.com/artifact/org.bouncycastle/bcpkix-jdk15on/1.70 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 fileNow 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 DataKey points: PGPEncryptedDataGenerator::addMethod(new BcPublicKeyKeyEncryptionMethodGenerator(pgpPublicKey));
PGPLiteralDataGenerator::open
That is it. Hope you find it helps.
I will write another post for PGP decryption. | 
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