z/OS Security Server RACF
The operating system provides integrity. By using a Security Server, in this case Resource Access Control Facility (RACF), you can protect resources by defining which resources are protected and which groups of users or which individual users have access to the defined resources. The definitions are kept in the RACF database. A RACF administrator defines users, user groups, and resources together with rules for how these resources can be used. RACF is “invisible” for most users if a good security structure is put in place. ...

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