GNU Privacy Guard (GPG)

GNU Privacy Guard (GPG) is a free, open-source software used for securing digital communication. It allows users to encrypt messages and files so that only intended recipients can read them, and to digitally sign data to verify its origin and integrity. GPG uses complex cryptographic techniques involving pairs of keys—one public and one private—that work together to ensure privacy and security. Think of it as a digital lock and key system that helps protect sensitive information from unauthorized access, ensuring confidentiality, authenticity, and trust in online exchanges.