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SA-8(28)Security and Privacy Engineering Principles | Acceptable Security

IL5
IL6

>Control Description

Implement the security design principle of acceptable security in organization-defined systems or system components.

>DoD Impact Level Requirements

No specific parameter values or requirements for this impact level.

>Discussion

The principle of acceptable security requires that the level of privacy and performance that the system provides is consistent with the users' expectations. The perception of personal privacy may affect user behavior, morale, and effectiveness. Based on the organizational privacy policy and the system design, users should be able to restrict their actions to protect their privacy.

When systems fail to provide intuitive interfaces or meet privacy and performance expectations, users may either choose to completely avoid the system or use it in ways that may be inefficient or even insecure.

>Assessment Interview Topics

Questions assessors commonly ask

Process & Governance:

  • What acquisition policies and procedures address the requirements of SA-8(28)?
  • How are security and privacy requirements integrated into the acquisition process?
  • Who is responsible for ensuring that acquisitions comply with SA-8(28)?

Technical Implementation:

  • How are security requirements defined and documented in acquisition contracts?
  • What mechanisms ensure that acquired systems and services meet security requirements?
  • How do you validate that vendors and service providers comply with specified security controls?

Evidence & Documentation:

  • Can you provide examples of acquisition documentation that includes security requirements?
  • What evidence demonstrates that acquired systems meet security specifications?
  • Where is acquisition security documentation maintained throughout the system lifecycle?

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