For the encryption key (KY), it is a write-only parameter, so it will never populate when you read from a radio or view defaults. This is also the case on the older version of X-CTU, or even if you query it with an AT command. Blank is the default. But as long as you have EE=0, it does not matter what KY is set to.
For the DD parameter, it will be a 32-bit field with the upper word being the radio type, and the lower word being product type. This is used to identify what type of product you are working with remotely, whether it is an analog or digital adapter, oem radio, or any of Digi's other packaged products. Unless you are working with a Digi gateway, or some of the legacy XBee-Pro 900 radios, it will not matter what DD is set to.
More information about DD can be found here if you are concerned: http://www.digi.com/wiki/developer/index.php/XBee_Product_Codes