Key Changes from NIST SP 800-171 Rev 2 to Rev 3

Описание: In May 2024, NIST introduced revision 3 of SP 800-171, bringing key changes to the way organizations handle cybersecurity for controlled unclassified information, or CUI. This update affects contractors and suppliers working with the Department of Defense, particularly those following the Defense Federal Acquisition Regulations Supplement, or DFARS. But with the Department of Defense maintaining compliance with revision 2 for now, many organizations are wondering: what does revision 3 mean for them?

This video will break down how revision 3 compares to revision 2, and what changes to expect as organizations map out the differences between the two. Mapping these revisions is essential for staying ahead of potential updates and ensuring that your systems are prepared for future requirements.

Let’s start with why NIST introduced revision 3. The goal was to eliminate ambiguity, simplify requirements, and align them more closely with updates to NIST SP 800-53. They’ve streamlined security requirements, increasing specificity and flexibility by removing outdated controls and adding organization-defined parameters, or ODPs. In fact, revision 3 reduces the number of security requirements from 110 in revision 2 to 97, while also adding new ones to reflect modern security challenges. This shift makes it crucial to understand how your current objectives in revision 2 map to the newer, more refined goals in revision 3.

Now, how do we connect these two revisions? Mapping the assessment objectives is the key. NIST has taken the objectives from revision 2 and cross-referenced them with revision 3, along with the underlying SP 800-53 Rev 5 controls. This mapping helps you track which requirements are new, which have been removed, and where there are overlaps between the two versions. For example, in revision 2, requirement 3.1.1 includes six key objectives related to user identification. In revision 3, this maps across multiple families, showing a more granular approach to access control and identification. This helps organizations tailor their security strategies to meet these refined objectives.

Another important element is how NIST SP 800-53 plays a role in these updates. Revision 3 now draws all requirements directly from SP 800-53 Rev 5, removing the distinction between basic and derived requirements. This presents a unique challenge in mapping objectives, but the good news is, many of the changes have made the process simpler. Additionally, with the Federal Risk and Authorization Management Program, or FedRAMP, using SP 800-53 controls, there’s now some overlap between these standards. This adds flexibility for organizations that also need to meet FedRAMP requirements, allowing them to streamline their efforts when protecting CUI.

So, what does this all mean for you? While there’s currently no contractual obligation to follow revision 3, the changes are worth preparing for. Mapping your current objectives from revision 2 to revision 3 will help ensure that your organization is ready when these updates become the new standard. Incorporating these mapping strategies can better position your organization for future compliance requirements, whether it’s for CMMC, DFARS, or even FedRAMP. By understanding the evolution of NIST SP 800-171 and the critical role of mapping assessment objectives, you can stay ahead of the curve and ensure your systems are secure, compliant, and ready for what’s next.

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