GNU Privacy Guard, a free software implementation of the OpenPGP standard for encrypting and signing data. It provides cryptographic privacy and authentication for data communication.
Modern acronym from 'GNU Privacy Guard,' where GNU is a recursive acronym meaning 'GNU's Not Unix.' Developed in the 1990s as a free alternative to PGP (Pretty Good Privacy), representing the open-source movement's approach to cryptographic tools.
GPG represents the democratization of military-grade encryption—what once required government resources is now freely available to anyone wanting to protect their digital privacy. The 'Pretty Good Privacy' heritage in its name is wonderfully modest for software that intelligence agencies once considered a national security threat!
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