Programs of the GPG (GNU Privacy Guard) / PGP (Pretty Good Privacy) family allow you to transparently sign and encrypt all types of digital information. In essence, these tools are just a convenient wrapper that simplifies the practical use of open asymmetric cryptography algorithms.
For several years, there has been a controversy about the relevance of using GPG, within which a lot of skepticism is expressed about the cumbersomeness and obsolescence of this cryptographic product. The high threshold of entry is obvious with the corresponding search query, which gives a lot of complex information and instructions for working with the GPG utility in the Linux terminal.
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