Support for JES2 spool encryption is introduced in z/OS V2R4, which provides a simple,
transparent, and consumable approach to enable extensive encryption and compression of JES2-managed
data sets on SPOOL. You can also identify data sets for compression only. The identification of data
sets to encrypt or compress or both is done without any application source code changes when you use
standard APIs.
When change was introduced:
z/OS V2R4 with the PTFs for the following APARs applied: