What does GPG stand for in the context of software installation security?

GPG stands for GNU Privacy Guard, which is a widely used encryption and signing tool that implements the OpenPGP standard. It allows users to secure their data and communications through encryption, providing confidentiality, as well as digital signatures, which help verify the authenticity and integrity of the data. In the context of software installation security, GPG is often employed to verify the authenticity of software packages by checking their signatures against trusted keys, ensuring that the software has not been tampered with and is from a legitimate source.

This use of GPG is crucial for maintaining the security of software installations, as it helps prevent attacks that could occur if malicious software were to masquerade as trusted applications. The other options, while they sound relevant, do not correspond to any recognized security standard or practice associated with software installation.