SDK does not sign eboots. Sony does. It says directly in the SDK that all you can do with SDK is create unsigned master disks for debug units, and then you send them to Sony to be finalized (signed)
.....and Duplex made an announcement a few months back about having obtained 3.60 keys....but it was obviously bull****, because we haven't had any 3.60+ decrypted eboots appear.
This is just another eboot to slip through the cracks unsigned