SC-4(2)—Multilevel Or Periods Processing
>Control Description
Prevent unauthorized information transfer via shared resources in accordance with ⚙organization-defined procedures when system processing explicitly switches between different information classification levels or security categories.
>Supplemental Guidance
Changes in processing levels can occur during multilevel or periods processing with information at different classification levels or security categories. It can also occur during serial reuse of hardware components at different classification levels. Organization-defined procedures can include approved sanitization processes for electronically stored information.
>Assessment Interview Topics
Questions assessors commonly ask
Process & Governance:
- •What policies govern the implementation of multilevel or periods processing?
- •How are system and communications protection requirements defined and maintained?
- •Who is responsible for configuring and maintaining the security controls specified in SC-4(2)?
Technical Implementation:
- •How is multilevel or periods processing technically implemented in your environment?
- •What systems, tools, or configurations enforce this protection requirement?
- •How do you ensure that multilevel or periods processing remains effective as the system evolves?
Evidence & Documentation:
- •What documentation demonstrates the implementation of SC-4(2)?
- •Can you provide configuration evidence or system diagrams showing this protection control?
- •What logs or monitoring data verify that this control is functioning correctly?
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