Selecting Tape Files for Encryption Using DFSMS › How Header Labels Work to Manage Tapes › Labels for Business-to-Business Tapes Using Code Books

Labels for Business-to-Business Tapes Using Code Books

Information about B2B tapes that use code books is written to standard user header labels, and includes the following:

• The code book name, written in clear text, along with a unique code book ID and information on how to rebuild the symmetric key from the code book.
• This information is stored on the tape in User Header Labels 1-8.
• The UHLs are stored after the HDR1-HDR2 for each encrypted tape file on the cartridge.
• The UTLs are stored at the end of every encrypted tape file on the volume.