From Page 3 of the Data Class Define panel, use the DOWN command to view Page 4, on which you specify the key labels and encoding mechanism.

Key Label

Specifies the label for the key encrypting key used by the Encryption Key Manager. The key encrypting key is used to encrypt the data (encryption) key. To specify the key label value, you can use up to 64 characters with blanks padding the field on the right. The characters can be alphanumeric, national, or special characters with some additional characters also allowed. It is treated as a free form field on input and validity checked by the control unit when the key label is first used and converted from EBCDIC to ASCII. The characters specified through ISMF must map to ASCII characters X'20' to "7E'.

Encoding Mechanism

Specifies how the label for the key encrypting key specified by the key label (input) is encoded by the Encryption Key Manager and stored on the tape cartridge.

• L = encoded as the specified label
• H = encoded as a hash of the public key