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 800-38F Rev. 1, PRE-DRAFT Call for Comments: Recommendation for Block Cipher Modes of Operation: Methods for Key WrappingInitial Preliminary Draft
NIST is soliciting public comments on a pre-draft revision to SP 800-38F that removes the deprecated TKW key wrapping method and revisits the approval of ad hoc combinations of encryption and authentication methods.
NIST is revising Special Publication 800-38F, Recommendation for Block Cipher Modes of Operation: Methods for Key Wrapping, and is soliciting preliminary feedback. The two main goals for the revision are to remove the specification of TKW because its underlying block cipher, TDEA, is no longer approved, and to revisit the approval of unspecified combinations of an approved encryption mode with an approved authentication method due to potential security vulnerabilities. NIST requests feedback on all aspects of this publication, especially on what ad hoc combinations are currently implemented and whether NIST should limit approval to explicit sets of combinations that occur within prominent protocols.
DIBs must ensure their key wrapping and authenticated encryption implementations align with current NIST standards, as the removal of TKW and the restriction of ad hoc combinations directly impact the cryptographic algorithms and protocols they are authorized to use.
- Provide public comments on the pre-draft revision to SP 800-38F by the specified deadline (July 10, 2026).
- Review the proposed removal of TKW and the restrictions on ad hoc combinations of encryption and authentication methods.
- Assess current implementations of ad hoc combinations of approved encryption modes and approved authentication methods.