This logged information is output when encryption key information created in the storage system is written to the file. It does not necessarily mean that the encryption key information is backed up on the file normally even if Normal End is displayed.
Example
09xx,YYYY/MM/DD,HH:MM:SS.xxx, 00:00,RMI AP,uid=user-name, Task Name,[ENC], Backup Keys to File,,Normal end, from=xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx,,Seq.=xxxxxxxxxx