If you want to enter more than two key parts, you must enter one or more intermediate key parts. Enter intermediate key parts after you enter the first key part and prior to entering the final one.

To enter intermediate master key parts:

1. Select option 1, COPROCESSOR MGMT, on the ICSF Primary menu and press ENTER.

   The Coprocessor Management panel appears.

2. Select the coprocessor(s) to be processed by entering an 'E' on the Coprocessor Management panel. Select the same coprocessors that were selected when entering the first key value.
3. When pressing ENTER, the Master Key Entry panel appears (Figure 43).
   Figure 43. The Master Key Entry Panel for Intermediate Key Values

    CSFDKE10 -------------- ICSF - Master Key Entry ---------
    COMMAND ===> 
   
                 CCF DES/PCICC SYM-MK new master key register     : PART FULL
                 CCF Signature/PCICC ASYM-MK master key register  : EMPTY 
                 CCF Key management master key register           : EMPTY
   
   
     Specify information below
       Key Type  ===> ___          (DES, SMK, KMMK, ALL-PKA)
   
       Part      ===> ______       (RESET, FIRST, MIDDLE, FINAL)
   
       Checksum  ===> 42
   
       Key Value ===> 4C2269A1008A754D
                 ===> B7642C135F68329A
                 ===> 0000000000000000   (SMK, KMMK and ALL-PKA only)
   
    

4. Fill in the panel
   1. Enter the master key type in the Key Type field.

      In this example we are continuing to enter the DES master key.

   2. Enter MIDDLE in the Part field.
   3. Enter the two-digit checksum and the two 16-digit key values (if you did not use random number generate).
   4. Make sure you have recorded the two 16-digit key values. You may need to reenter these same values at a later date to restore master key values that have been cleared. Make sure all master key parts you enter are recorded and saved in a secure location.
   5. When all the fields are complete, press ENTER.

      If the checksum entered in the checksum field matches the checksum that the Cryptographic Coprocessor Feature calculated, the key part is accepted. The message at the top of the panel states KEY PART LOADED, as shown in Figure 44. The new master key register status changes to PART FULL. The verification pattern and hash pattern that are calculated for the key part appear near the bottom of the panel.

      Compare them with the patterns generated by the random number generator or provided by the person who gave you the key part value to enter.

   6. Record the verification pattern and hash pattern.
      Figure 44. The Master Key Entry Panel with Intermediate Key Values

       CSFDKE10 -------------- ICSF - Master Key Entry -----KEY PART LOADED
       COMMAND ===> 
      
                    CCF DES/PCICC SYM-MK new master key register     : PART FULL
                    CCF Signature/PCICC ASYM-MK master key register  : EMPTY 
                    CCF Key management master key register           : EMPTY
      
      
        Specify information below
          Key Type  ===> DES      (DES, SMK, KMMK, ALL-PKA)
      
          Part      ===> MIDDLE   (RESET, FIRST, MIDDLE, FINAL)
      
          Checksum  ===> 00
      
          Key Value ===> 0000000000000000
                    ===> 0000000000000000
                    ===> 0000000000000000   (SMK, KMMK and ALL-PKA only)
      
        Entered key part VP:  8D8A000BE067EBF7  HP: 9D92F343479D77F2  229FD4CDB49C2679
      
                           (Record and secure these patterns)
       

5. If the checksums do not match, the message Invalid Checksum appears. If this occurs, follow this sequence to resolve the problem:
   1. Reenter the checksum.
   2. If you still get a checksum error, recalculate the checksum.
   3. If your calculations result in a different value for the checksum, enter the new value.
   4. If your calculations result in the same value for the checksum, or if a new checksum value does not resolve the error, reenter the key part halves and checksum.

When you have entered the middle key part successfully, continue with:

• Steps for generating key parts using ICSF utilities if you are using the ICSF utilities to generate random numbers for key values.
• Steps for entering the final key part if you are entering key parts manually.