ICH*

ICH are the first three characters of IBM's product RACF. RACF identifies and verifies users by checking ID and passwords provided on job cards, TSO logons, or IMS and CICS signons. It performs operator ID, application and terminal checking, and handles access authorization checking for DASD data sets.

Reference Sources

Data Sources Software, Volume 2, Computer Associates International, Inc., Ziff Communications Company, 1989.