Which part of an operating system (OS) is responsible for providing security interfaces among the hardware, OS, and other parts of the computing system?

The correct answer is D. Reference monitor. The reference monitor is the part of the operating system that enforces the security policy and controls the access between subjects and objects. The reference monitor mediates all requests for resources and verifies that the subject has the appropriate permissions and privileges

Submitted by andres_qro· Mar 5, 2026Security Architecture and Engineering

Question

Options

ATrusted Computing Base (TCB)
BTime separation
CSecurity kernel
DReference monitor

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(33 responses)

A
3% (1)
C
3% (1)
D
94% (31)

Explanation

The reference monitor is the part of the operating system that enforces the security policy and controls the access between subjects and objects. The reference monitor mediates all requests for resources and verifies that the subject has the appropriate permissions and privileges to access the object. The reference monitor should be tamperproof, always invoked, and small enough to be verified.

Topics

#Reference monitor#OS security#Security kernel#Trusted Computing Base

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