News & Updates

The initial public draft (ipd) of NIST Special Publication (SP) 800-209r1, Security Guidelines for Storage Infrastructure, is now available for public comment through September 8, 2026.

NIST is revising Special Publication 800-38D, Recommendation for Block Cipher Modes of Operation: Galois/Counter Mode (GCM) and GMAC. The public comment period is open through July 31, 2026.

This announcement is a pre-draft call for comments to solicit preliminary feedback on SP 800-38F. The public comment period is open through July 10, 2026.

The final release of Special Publication 1800-37, Addressing Visibility Challenges with TLS 1.3 within the Enterprise, is now available.

NIST proposes to develop three general-purpose cryptographic accordions that are variants of the HCTR2 technique. These will be specified in future SP 800-197x publications. Submit comments on this proposal through August 6, 2025.

After two public comment periods, NIST has decided to revise CMAC and CCM block cipher modes of operation specified in NIST Special Publications 800-38B and 800-38C.

NIST has released a second public draft (2PD) of Special Publication (SP) 800-38Gr1 (Revision 1), Recommendation for Block Cipher Modes of Operation: Methods for Format-Preserving Encryption, for public comment. The public comment period for this draft is open through April 4, 2025.

NIST's Crypto Publication Review Board is proposing to update Special Publications 800-38B, "The CMAC Mode for Authentication," and 800-38C, "The CCM Mode for Authentication and Confidentiality." Submit public comments through Friday, February 28, 2025.

NIST requests public comments on whether to pursue one or both approaches  (GCM and GMAC).The public comment period closes on March 14, 2025. 

NIST indicated its interest in vetting another Rijndael variant for approval: Rijndael with 256-bit blocks (i.e., Rijndael-256) with a single key size of 256-bits. NIST plans to develop a draft standard for Rijndael-256 over the next year and requests public comments on this plan by June 25, 2025.

NIST releases NIST IR 8537, NIST Workshop on the Requirements for an Accordion Cipher Mode 2024: Workshop Report.

NIST is pleased to announce the release of Internal Report (IR) 8459, Report on the Block Cipher Modes of Operation in the NIST SP 800-38 Series.

NIST is reviewing Special Publications 800-38B and 800-38C (CMAC and CCM block cipher modes) and requests public comments by September 13, 2024.

After two public comment periods, NIST has decided to revise SP 800-38E, "Recommendation for Block Cipher Modes of Operation: the XTS-AES Mode for Confidentiality on Storage Devices." 

Volumes A (2nd preliminary draft) and B (initial prelim. draft) of NIST Special Publication 1800-37, Addressing Visibility Challenges with TLS 1.3 within the Enterprise, are available for public comment through April 1, 2024.

NIST has published NIST Internal Report (IR) 8450, Overview and Considerations of Access Control Based on Attribute Encryption.

NIST is proposing to revise NIST Special Publication 800-38D. Please submit public comments by October 9, 2023.

The specification of the Triple Data Encryption Algorithm (TDEA), NIST SP 800-67 Rev. 2, will be withdrawn January 1, 2024. The algorithm will be disallowed for applying cryptographic protection but will continue to be allowed for processing already-protected data.

NIST has published NIST Internal Report 8454, Status Report on the Final Round of the NIST Lightweight Cryptography Standardization Process. The announcement of NIST's decision to standardize the ASCON family was announced on February 7, 2023.

The National Cybersecurity Center of Excellence (NCCoE) invites you to share your feedback on the preliminary draft of NIST Special Publication 1800-37 Volume A, Addressing Visibility Challenges with TLS 1.3.

NIST Internal Report (IR) 8450, Overview and Considerations of Access Control Based on Attribute Encryption, is now available for public review and comment. The deadline to submit comments is June 23, 2023.

Today, NIST has published an update of Federal Information Processing Standards Publication (FIPS) 197, Advanced Encryption Standard (AES).

NIST has decided to revise SP 800-38A, "Recommendation for Block Cipher Modes of Operation: Methods and Techniques." Read this announcement for more details.

NIST is proposing to update Special Publication (SP) 800-38E, "Recommendation for Block Cipher Modes of Operation: the XTS-AES Mode for Confidentiality on Storage Devices." Please submit public comments by March 10, 2023.

NIST's Crypto Publication Review Board is proposing to update FIPS 197, and public comments are due on the draft by February 13, 2023. No technical changes are being made to the standard. This announcement summarizes the proposed changes.