In this guide, I will explain the options at your disposal for encrypting files using open-source software on a Linux, Mac, or Windows computer. You can then transport this digital information across distance and time, to yourself or others.
The program “GNU Privacy Guard” (GPG) an open-source version of PGP (Pretty Good Privacy), allows:
- Encryption using a password.
- Secret messaging using public/private key cryptography
- Message/Data authentication (using digital signatures and verification)
- Private key authentication (used in Bitcoin)