Would you expand on your question a bit, Steve.  I assume you mean Kerberos
KDC. Does AD mean Active Directory (Microsoft) in the context of your
question? Basically, if you could draw a mental picture, that would be
helpful.

To take a guess at your question, I think there are a fair number of places
where identity management is used to grant and revoke user credentials
within the mainframe security systems. But very typically the mainframe
security system remains responsible for authenticating and authorizing user
access to various mainframe-hosted resources, and often to various
resources outside the mainframe as well.  (The "boss" security hub,
basically.)  There are myriad reasons for that, but fundamentally the
mainframe-hosted resources are typically extremely high business value, and
mainframe security systems are exceptionally, even uniquely, strong and
well-proven, assuming competent management of course.

So in most environments there's a push to use the mainframe as a security
"hub," extending its reach to encompass other resources (information,
applications) in standards-compliant ways. There are various ways to do
that, but I'll stop there in case I'm headed in the wrong direction with
that background.

- - - - -
Timothy Sipples
IBM Consulting Enterprise Software Architect
Specializing in Software Architectures Related to System z
Based in Tokyo, Serving IBM Japan and IBM Asia-Pacific
E-Mail: [EMAIL PROTECTED]
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