Exporting public keys
OpenPGP public keys are as name suggests – public. You can post them in your website or include it in your email signature – although the signature might be little long after that.
Exporting public key with Kleopatra
Select your certificate in Kleopatra and select File > Export Certificates or Ctrl+E.
Exporting the public key with PGA
Select the generated certificate / key in the list and select Keys > Export Keys from the menu. Pick the location and name for the file and click save.
Share the public key
Open the exported public key file with your favorite text edit (ie. Notepad) and copy the public key to your clipboard or send the file to the party you wish to communicate securely.
When you receive OpenPGP public key block, you need to add that key to your keyring. You can accomplish that by saving public key to a file or to a clipboard.
How to add public key in Kleopatra
Select Kleopatra icon from the taskbar and right click it. From popup menu select Clipboard > Certificate Import.
Kleopatra acknowledges count of imported certificates and the certificate appears in Other Certificates tab.
How to add public key in GPA
If you have already created the keys, the GPA opens in to the Clipboard mode. If you are in Key Manager window, you can get in to the Clipboard mode by selecting Windows > Clipboard from the menu.
Copy (Ctrl + c) the public key from email / file to the clipboard and then select Gnu Privacy Assistant Key Manager windows and paste it (Ctrl + v).
The new key appears in to your key manager window.