During OPEN processing, when a data set is opened for OUTPUT, existing message IEC205I externalizes each Key Label and the associated encoding mechanism. If the returned key label is a hash value, *HASH* is appended to the returned value.

The returned encoding mechanism indicates how the key label is recorded by the encryption key manager (EKM) and stored on the tape cartridge. It does not necessarily reflect how the key label itself is being returned and displayed in the key label fields. If an encoding mechanism of "hash" is used, the encryption key manager (EKM) will always try and return its associated key label, and only if it can't, will a "hash" value be returned and displayed in the IEC205I message.

IEC205I SYSUT2,ATNCMP1,STEP1,FILESEQ=1, COMPLETE VOLUME LIST,
DSN=ATL.TESTJOB.EE2,VOLS=J11986,
LISTED VOL(S) HAVE BEEN DATA ENCRYPTED,KL1CD:L,KL2CD:L,
KL1=dfsmskeylabel1,KL2=dfsmskeylabel2,TOTALBLOCKS=1