Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Block Cipher Techniques

Publications

The following NIST-authored publications are directly related to this project.

Series & Number Title Status Released
SP 800-38G Rev. 1 Recommendation for Block Cipher Modes of Operation: Methods for Format-Preserving Encryption Draft 02/03/2025
SP 800-38D Rev. 1 Pre-Draft Call for Comments: GCM and GMAC Block Cipher Modes of Operation Draft 01/06/2025
SP 800-197 PRE-DRAFT Call for Comments: NIST Proposes to Standardize a Wider Variant of AES Draft 12/23/2024
IR 8537 NIST Workshop on the Requirements for an Accordion Cipher Mode 2024: Workshop Report Final 11/21/2024
IR 8459 Report on the Block Cipher Modes of Operation in the NIST SP 800-38 Series Final 09/10/2024
Other Proposal of Requirements for an Accordion Mode: Discussion Draft for the NIST Accordion Mode Workshop 2024 Draft 04/10/2024
FIPS 197 Advanced Encryption Standard (AES) Final 05/09/2023
SP 800-131A Rev. 2 Transitioning the Use of Cryptographic Algorithms and Key Lengths Final 03/21/2019
SP 800-38B Recommendation for Block Cipher Modes of Operation: the CMAC Mode for Authentication Final 10/06/2016
SP 800-38G Recommendation for Block Cipher Modes of Operation: Methods for Format-Preserving Encryption Final 08/04/2016
Other Analysis of VAES3 (FF2) Final 04/02/2015
SP 800-38F Recommendation for Block Cipher Modes of Operation: Methods for Key Wrapping Final 12/13/2012
SP 800-38A Recommendation for Block Cipher Modes of Operation: Three Variants of Ciphertext Stealing for CBC Mode Final 10/21/2010
SP 800-38E Recommendation for Block Cipher Modes of Operation: the XTS-AES Mode for Confidentiality on Storage Devices Final 01/18/2010
SP 800-38D Recommendation for Block Cipher Modes of Operation: Galois/Counter Mode (GCM) and GMAC Final 11/28/2007
SP 800-38C Recommendation for Block Cipher Modes of Operation: the CCM Mode for Authentication and Confidentiality Final 07/20/2007
SP 800-38A Recommendation for Block Cipher Modes of Operation: Methods and Techniques Final 12/01/2001

Contacts

Cipher Modes Technical Inquiries
ciphermodes@nist.gov

Dr. Morris Dworkin - NIST

Dr. Meltem Sönmez Turan - NIST

Dr. Nicky Mouha - Fedwriters

Topics

Security and Privacy: encryption, message authentication

Created January 04, 2017, Updated February 03, 2025