GnuPG
Open SourceGNU Privacy Guard (GnuPG or GPG) is a free and open-source implementation of the OpenPGP standard, widely used for encrypting and signing data and communications. It provides a robust suite of command-line and graphical tools to protect sensitive information.
Key Features
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Strong and widely respected cryptographic implementation based on the OpenPGP standard.
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Free and open source, promoting transparency and community-driven security.
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Cross-platform availability across major operating systems.