ISC2 Governance, Risk and Compliance (CGRC) Practice Question
While finalizing the System Security Plan for a federal case-management application, you note an outbound REST API that transmits moderate-impact PII to a commercial analytics platform. According to NIST SP 800-18 Rev. 1 requirements for documenting system interconnections, which detail is most important to capture about this link?
The expected monthly invoice amount charged by the analytics provider.
The provider's sales and marketing contact information.
The programming language used to implement the REST API endpoints.
The cryptographic and authentication safeguards applied to the API traffic (for example, TLS version and mutual certificate validation).
NIST SP 800-18 Rev. 1 states that each system-to-system connection must describe the sensitivity of information exchanged and the security controls that protect the link-such as encryption protocols and authentication methods. Recording the cryptographic and authentication safeguards directly addresses the nature and security requirements of the connection. Billing data, marketing contacts, or the API's programming language may be useful administratively or for development, but they are not required elements for interconnection documentation focused on security posture.
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What is PII and why is it classified as moderate impact?
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What are cryptographic safeguards like TLS and mutual certificate validation?
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Why does NIST SP 800-18 Rev. 1 emphasize documenting security controls for interconnections?
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ISC2 Governance, Risk and Compliance (CGRC)
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