Which choice below MOST accurately describes partitioned security
mode?
A.
The only state in which certain privileged instructions may beexecuted.
B.
A system containing information accessed by personnel with different security clearances.
C.
All personnel have the clearance but not necessarily formal access approval.
D.
All personnel have the clearance and formal access approval.
Explanation:
A partitioned security mode is a mode of operation wherein all personnel
have the clearance but not necessarily formal access approval
and need-to-know for all information contained in the system.
*Answer “All personnel have the clearance and formal access approval” is a compartmented
security modE. A compartmented
security mode is a mode of operation wherein all personnel have a
valid personnel clearance, formal access approval and signed nondisclosure
agreements, and valid need-to-know for that information to
which he/she is to have access.
*Answer “The only state in which certain privileged instructions may beexecuted” is executive
statE. Executive state is one of several states
in which a system may operate and the only one in which certain
privileged instructions may be executeD. Such instructions cannot be
executed when the system is operating in other (e.g., user) states.Synonymous with supervisor state.
*Answer “A system containing information accessed by personnel with different security
clearances” is multilevel securE. Multilevel secure is a class of system
containing information with different sensitivities that simultaneously
permits access by users with different security clearances
and needs-to-know, but prevents users from obtaining access to
information for which they lack authorization.
Source: DoD 5200.28-STD Department of Defense Trusted Computer
System Evaluation Criteria.
partitioned security mode:
all personnel
have the clearance but not necessarily formal access approval
and need-to-know for all information contained in the system.
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Eric Conrad’s book defines ‘Compartmented Security Mode’ as:
In a compartmented mode of operation system, all subjects accessing the system have
the necessary clearance but do not have the appropriate formal access approval, nor do
they need to know for all the information found on the system. Objects are placed into
“compartments” and require a formal (system-enforced) need to know to access.
Compartmented mode systems use technical controls to enforce need to know (as
opposed to a policy-based need to know).
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Notice that he say
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