Implement a reference monitor for [Assignment: organization-defined access control policies] that is tamperproof, always invoked, and small enough to be subject to analysis and testing, the completeness of which can be assured.
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| The [spacecraft] shall implement a reference monitor mechanism that mediates access between subjects and objects based on a defined set of rules, that is designed and configured to resist tampering or unauthorized alteration, providing a reliable and secure foundation for access control within the information system.{AC-25} |
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