The load-bearing documents for a DIB program — CMMC / DFARS regulatory text (eCFR), federal rulemaking, NIST publications and OIRA review — organized as a library. Pick a document; the reader shows the dex dossier: what it says, why it matters, and the concrete obligations it imposes. Originals open at the source.
SP 800-38E Rev. 1, Recommendation for Block Cipher Modes of Operation: XTS-AES Mode for Confidentiality on Storage DevicesInitial Public Draft
NIST updates SP 800-38E to approve XTS-AES (per IEEE Std. 1619-2025) for storage device confidentiality, clarifying scope, key limits, and ciphertext stealing ordering.
Revision 1 of Special Publication 800-38E approves the XTS-AES mode as specified in IEEE Std. 1619-2025 for protecting the confidentiality of data on block-oriented storage devices. This approval is subject to the applicability statements, conformance requirements, and clarifications in this recommendation. XTS-AES does not provide authentication of the data or its source.
DIBs must ensure their storage encryption implementations conform to the updated XTS-AES specifications and key-scope limits to maintain CMMC/NIST 800-171 compliance for data-at-rest protection.
- Conform to the applicability statements and conformance requirements for XTS-AES as specified in IEEE Std. 1619-2025.
- Adhere to the clarified data-unit and key-scope limits for XTS-AES.
- Implement the specified ordering convention for ciphertext stealing in XTS-AES.