SP 800-38E Rev. 1, Recommendation for Block Cipher Modes of Operation: XTS-AES Mode for Confidentiality on Storage DevicesInitial Public Draft
Revision 1 updates the referenced specification to IEEE Std. 1619-2025 and clarifies NIST's requirements for the approved use of XTS-AES, including its scope of use, data-unit and key-scope limits, key requirements, and the ordering convention for ciphertext stealing. Rather than reproducing the XTS-AES specification, this recommendation incorporates IEEE Std. 1619-2025 by reference. To facilitate review of the draft SP, IEEE Std. 1619-2025 is publicly available during the public comment period. The public comment period is open through October 16, 2026. NOTE: A call for patent claims is included in this draft. For additional information, see the Information Technology Laboratory (ITL) Patent Policy - Inclusion of Patents in ITL Publications.
Open the source record- Tags
- NIST, draft open for comment, SP 800-38E REV. 1
- Related exam domains
- CISSP 1: Security and Risk Management; CISM 1: Information Security Governance
- Source record id
- https://csrc.nist.gov/pubs/sp/800/38/e/r1/ipd
- First seen by InfoSec Signals
- 9/23/2026
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