Key Variant Problem

Hi All,

I received a set of test ZMKs and encrypted ZPK from a third party
processor. I was able to generate the same check digits for the ZMK
but the ZPK is the main headache. The test components are:

Component 1:    E38F D6D9 EF85 A892 F2FB FDD0 83A4 07AE
Component 2:    D008 5DBF FB37 23B9 26CB 7980 B9EA 6268
Component 3:    2029 5EBC 0B80 BF5E F7F7 8C91 2568 6D3B

Check Digits: 2D617C

ZPK: 61BA 6165 60CA E607  AE48 319D F390 533E
Check Digits: 1426

When computing check digits for the ZPK, I get a different check
value. I've used many variant values and methods but still can not get
the same check digits. Any suggestions would be highly appreciated.

Angel.

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