IMS password security
Use the Resource Access Control Facility (RACF®) to protect your databases and program specification blocks (PSBs).
RACF is part of the z/OS® Security Server and can be used to control access to IMS resources. RACF has superseded the IMS Security Maintenance Utility (SMU), which was last supported in IMS version 9. For further information about password security, see System administration in IMS product documentation.