+SA-08(06) Minimized Sharing
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SA-08(06) Minimized Sharing
Control
Implement the security design principle of minimized sharing in [Assignement: systems or system components].
Discussion
The principle of minimized sharing states that no computer resource is shared between system components (e.g., subjects, processes, functions) unless it is absolutely necessary to do so. Minimized sharing helps to simplify system design and implementation. In order to protect user-domain resources from arbitrary active entities, no resource is shared unless that sharing has been explicitly requested and granted. The need for resource sharing can be motivated by the design principle of least common mechanism in the case of internal entities or driven by stakeholder requirements. However, internal sharing is carefully designed to avoid performance and covert storage and timing channel problems. Sharing via common mechanism can increase the susceptibility of data and information to unauthorized access, disclosure, use, or modification and can adversely affect the inherent capability provided by the system. To minimize sharing induced by common mechanisms, such mechanisms can be designed to be reentrant or virtualized to preserve separation. Moreover, the use of global data to share information is carefully scrutinized. The lack of encapsulation may obfuscate relationships among the sharing entities.
Assessment Objective
[Assignement: systems or system components] implement the security design principle of minimized sharing.
Assessment Method
Examine
System and services acquisition policy
procedures addressing the security design principle of minimized sharing used in the specification, design, development, implementation, and modification of the system
system design documentation
security and privacy requirements and specifications for the system
system security and privacy architecture
system security plan
other relevant documents or records
Interview
Organizational personnel with the responsibility for determining system security and privacy requirements
organizational personnel with system specification, design, development, implementation, and modification responsibilities
system developers
organizational personnel with information security responsibilities
1. Panoramica
1.1 Riferimenti
1.2 Requisiti identificati
1.3 Regolamentazioni correlate
2. Requisiti identificati
Requisiti
| Fonte |
Requisito |
3. Regolamentazioni correlate
Regolamentazioni
| Fonte |
Regolamentazione |
Ticket collegati
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