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Security Fundamentals & Crypto · Foundational

GNU Privacy Guard (GPG)

Free, open-source implementation of the OpenPGP standard.

Definition

GPG (GnuPG) is used to encrypt and sign files and email, verify software releases, and sign Git commits. It manages keyrings and supports RSA, ECC, and other algorithms. Linux package managers use GPG signatures to verify repository integrity.

Example

gpg --verify release.tar.gz.sig release.tar.gz checks a download's signature.

Exam tip

GPG is the common tool for verifying signed Linux packages and software downloads.

Related terms