When backing up your data, you can secure it through host-based encryption. You request host-based encryption on the DFSMSdss DUMP command. As with tape device encryption, host-based encryption through DFSMSdss provides a means of encrypting your installation's tape volumes.

Usually, DFSMSdss does not allow double encryption of data with the DUMP command. For a description of how DFSMSdss handles conflicting encryption requests, refer to DFSMSdss processing of dump encryption requests.

In the unlikely event that your installation requires double encryption for a dump data set, you can use the procedure described in If double encryption is required to dump and restore a doubly-encrypted data set.