PGP/GPG encryption (Pretty Good Privacy) is a public-key encryption program that has become the most popular standard for files and email encryption.
In addition to encrypting and decrypting files and emails, PGP is used to sign messages so that the receiver can verify both the identity of the sender and the integrity of the content. PGP uses a private-key that must be kept secret and a public-key that the sender and receiver must share.
Setting up PGP/GPG encryption will allow you to:
GPG (Gnu Privacy Guard) is an independent implementation of the OpenPGP standards. Click here to download the app:https://www.openpgp.org/software/
Using Gpg4win/Kleopatra for OpenPGP
https://www.gpg4win.org/download.html
Using GPG Suite for OpenPGP
https://gpgtools.org/