to make your sites more secure we suggest to modify the galley path in settings > Gallery > “Gallery folder path”. That way only you know where your images are located.
The plugin is designed not to display the image path to the user. If you want to add additional security you can try to add a .htaccess file in your gallery directory with this code. Note that we did not test the code.
<Limit GET POST PUT DELETE>
order deny,allow
deny from all
</Limit>