Encrypting and Decrypting Files with GnuPG (GPG)
GnuPG (GPG) is a complete implementation of the OpenPGP standard (RFC 4880). It allows you to encrypt data either symmetrically (using a shared passphrase) or asymmetrically (using public/private key pairs). When you need to protect sensitive documents (such as financial records, credentials, or backups) before sending them over email or untrusted channels, symmetric GPG encryption provides strong, zero-infrastructure security. Symmetric Encryption with a Passphrase To encrypt a file symmetrically using a password: ...