QUICK INFO:

• Asymmetric encryption: key pair (Private, Public): the recipient sends his Public key to the sender

• Command to import a Public Key:

  • gpg --import KEY_FILE

• Command to encrypt some text for a recipient (output on screen):

  • echo  "TEXT TO ENCRYPT" | gpg --sign --local-user KEY_ID --encrypt --armor  --recipient EMAIL_OF_RECIPIENT --recipient SENDER_EMAIL

• Command to encrypt some text for a recipient (output on file):

  • echo  "TEXT TO ENCRYPT" | gpg --sign --local-user KEY_ID --encrypt --armor  --recipient EMAIL_OF_RECIPIENT --recipient SENDER_EMAIL >  FILE_NAME.txt.asc

• Command to read the encrypted file on screen:

  • cat FILE_NAME.txt.asc

• To decrypt a text encrypted with our Public Key: 

  • paste the encrypted, armored text into a file

  • save the file as .asc: e.g. "FILE_NAME.txt.asc

  • gpg --decrypt FILE_NAME.txt.asc > FILE_NAME.txt

• Command to read the decrypted file on screen:

  • cat FILE_NAME.txt