You use an ADD or UPDATE control statement to have KGUP generate a key value to place in the CKDS. The program generates the value, enciphers the value under a master key variant, and places the value in the CKDS. When KGUP generates a key, the program may also store information to create the key's complement in a data set.
You can have KGUP generate a transport key that you use to send or receive keys from a system that does not use control vectors. KGUP places the key into the CKDS with an indication that the key is to be used without control vectors.