gpg

GNU Privacy Guard. See gpg2 for GNU Privacy Guard 2. Most operating systems symlink gpg to gpg2. More information: https://gnupg.org.

• Create a GPG public and private key interactively:
  gpg --full-generate-key
• Sign doc.txt without encryption (writes output to doc.txt.asc):
  gpg --clearsign {{doc.txt}}
• Encrypt and sign doc.txt for [email protected] and [email protected] (output to doc.txt.gpg):
  gpg --encrypt --sign --recipient {{[email protected]}} --recipient {{[email protected]}} {{doc.txt}}
• Encrypt doc.txt with only a passphrase (output to doc.txt.gpg):
  gpg --symmetric {{doc.txt}}
• Decrypt doc.txt.gpg (output to stdout):
  gpg --decrypt {{doc.txt.gpg}}
• Import a public key:
  gpg --import {{public.gpg}}
• Export public key for [email protected] (output to stdout):
  gpg --export --armor {{[email protected]}}
• Export private key for [email protected] (output to stdout):
  gpg --export-secret-keys --armor {{[email protected]}}