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If you are a non-z/OS business partner who receives an encrypted B2B tape, you must import the code book using the CA Tape Encryption Multiplatform Decryption Utility (MDU) import function. This import process places a copy of the code book in a special directory structure that is created and maintained by the MDU.
After the code book is imported, you can retain the original code book file, archive it, or delete it at your convenience because the MDU has made a copy of the code book in its own directory structure.
If you delete the code book and the copy made by the MDU is lost or damaged, you would need to get a replacement copy of it from the business partner who sent you the tape originally. The MDU never references the original code book file during the decryption process. Only the imported copy of a code book is referenced for decryption.
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