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GPG uses public key encryption. You can use someone's public key to encrypt a message or document, in a way that only the owner of the corresponding private key will be able to decrypt. This is a great way to send somebody highly confidential data.

As you can see, you can use RSA or DSA, despite GPG specifying that you can use AES256 .

GnuPG, or gpg, is the free implementation of the well known Open PGP project. It allows you to encrypt or decrypt files based on keys. gpg uses what is commonly known as the public key cryptography, using a private and public key to allow safe encryption or decryption of files.

Encrypting Files Using GPG in Linux To encrypt a plain text file using the just created GPG key pair, run the following command. The -e or --encrypt flag enables encryption and the -r or --recipient flag is used to specify the recipient ID and secret. txt is the plain text file to be encrypted.

GnuPG uses public-key cryptography so that users may communicate securely. In a public-key system, each user has a pair of keys consisting of a private key and a public key.

What is a GPG file? A GPG file is an encryption/decryption key file that is used by GNU Privacy Guard (GnuPG) encryption program. The GnuPC program itself is based on the OpenPGP standard as defined RFC4880 and is also known as PGP.

With its combination of asymmetric (Public + Private Key) cryptography and symmetric (Secret Key) cryptology, GPG encryption provides a high level of data protection.

GnuPG allows you to encrypt and sign your data and communications; it features a versatile key management system, along with access modules for all kinds of public key directories. GnuPG, also known as GPG, is a command line tool with features for easy integration with other applications.