GPG-to-QR Workflow This guide explains how to securely encrypt a file, convert it into a QR code for physical or digital storage, and then decode/decrypt it back into its original form using gpg and zbarimg. Prerequisites You will need the following tools installed on your system: GnuPG (gpg): For industrial-grade encryption. qrencode: To generate the QR code image. zbar-tools: To decode the QR code image (includes zbarimg and zbarcam). Installation (Debian/Ubuntu):