Executar
gpg --edit-key <your key id>
Isto irá iniciar o modo de edição das teclas do gpg. Em seguida, use o comando addphoto
:
gpg> addphoto
Pick an image to use for your photo ID. The image must be a JPEG file. Remember that the image is stored within your public key. If you use a very large picture, your key will become very large as well! Keeping the image close to 240x288 is a good size to use.
Enter JPEG filename for photo ID: