Data Sovereignty and Residency in CMMC Compliance
XQ + Meerkat Position Paper
Authors:
Under CMMC requirements, data sovereignty plays a critical role in ensuring that Controlled Unclassified Information (CUI) is stored, processed, and accessed in compliance with regulatory mandates.
Microsoft’s guidance asserts that certain CUI categories—such as Defense and Export-Controlled data—must reside within a U.S. Sovereign Cloud, such as GCC High or DoD environments.
However, for other CUI categories, data residency requirements may vary depending on the specific contractual and regulatory obligations.
XQ’s Zero Trust Data Security solution eliminates data sovereignty concerns by enforcing encryption at the endpoint before CUI is transmitted or stored. This ensures that:
CUI remains encrypted in transit and at rest, regardless of where it is stored.
Organizations maintain full control over decryption keys, preventing unauthorized access—even by cloud providers.
Data residency requirements become less restrictive, as encrypted CUI remains unreadable outside authorized environments.
By securing CUI at the point of creation, XQ enables organizations to comply with CMMC, DFARS, and ITAR regulations while maintaining operational flexibility in choosing storage and collaboration environments.
This approach provides a viable alternative to sovereign cloud mandates without compromising security or compliance.
References
Federal Acquisition Regulation (FAR). 2016. "Basic Safeguarding of Covered Contractor Information Systems." 48 CFR § 52.204-21. https://www.acquisition.gov/far/52.204-21.
Defense Federal Acquisition Regulation Supplement (DFARS). 2016. "Safeguarding Covered Defense Information and Cyber Incident Reporting." 48 CFR § 252.204-7012. https://www.acq.osd.mil/dpap/dars/dfars/html/current/252204.htm.
Cybersecurity Maturity Model Certification (CMMC). 2024. "CMMC Rule: Handling of CUI in Transit." U.S. Department of Defense.
National Institute of Standards and Technology (NIST). 2020. Security and Privacy Control Baselines for Federal Information Systems and Organizations. NIST Special Publication 800-53B. https://csrc.nist.gov/publications/detail/sp/800-53b/final.
Microsoft, "Understanding Compliance Between Commercial, Government, DoD & Secret Offerings," Microsoft Tech Community. https://techcommunity.microsoft.com/blog/publicsectorblog/understanding-compliance-between-commercial-government-dod--secret-offerings---f/4225436
International Traffic in Arms Regulations: Creation of Definition of Activities That Are Not Exports, Reexports, Retransfers, or Temporary Imports; Creation of Definition of Access Information; Revisions to Definitions of Export, Reexport, Retransfer, Temporary Import, and Release
https://www.federalregister.gov/d/2019-27438/page-70889
Activities that are not exports, reexports, retransfers, or temporary imports
“5) Sending, taking, or storing technical data that is:
(i) Unclassified;
(ii) Secured using end-to-end encryption;
(iii) Secured using cryptographic modules (hardware or software) compliant with the Federal Information Processing Standards Publication 140-2 (FIPS 140-2) or its successors, supplemented by software implementation, cryptographic key management, and other procedures and controls that are in accordance with guidance provided in current U.S. National Institute for Standards and Technology (NIST) publications, or by other cryptographic means that provide security strength that is at least comparable to the minimum 128 bits of security strength achieved by the Advanced Encryption Standard (AES-128);”
