GSMLG

GnuPG uses public key cryptography so that users may communicate securely.

Create Key

gpg --gen-key

This will ask for key type, commonly uses RSA algorithms.

Then it will ask for your name, email and comment for this key.

List Key

gpg --list-key

Encrypt file

gpg --output doc.gpg --encrypt --recipient blake@cyb.org doc

Decrypt file

 gpg --output doc --decrypt doc.gpg

Symmetric encrypt

gpg --output doc.gpg --symmetric doc

Message Encrypt

# Encrypt with public key
gpg --encrypt --sign --armor -r person@email.com name_of_file
# Decrypt
gpg file_name.asc

Export all public keys

gpg -a --export > mypubkeys.asc

Export all encrypted private keys (which will also include corresponding public keys)

gpg -a --export-secret-keys > myprivatekeys.asc

Export gpg’s trusted to a text file

gpg --export-ownertrust > otrust.txt

Import gpg private keys and public keys and trust db

# batch will not prompt password verify
gpg (--batch) --import myprivatekeys.asc
gpg --import mypubkeys.asc
gpg --import-ownertrust otrust.txt