MPE/iX provides two methods of establishing and maintaining file security.
access control definitions (ACD) for file and devices
traditional file security for disk files only
ACDs are implemented to provide a security mechanism that
meets standards set forth by the National Computer Security Center.
Traditional file security works through the mechanism long available
on MPE systems. ACDs override any security
measures implemented by traditional means. In addition, MPE/iX now
provides logging facilities to track ACD security-related transactions.
ACDs are discussed first in this chapter, followed by topics
relating to the traditional mechanisms of file security.
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