Skip to main content
U.S. flag

An official website of the United States government

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.

NIST Publishes IR 8459, Report on the Block Cipher Modes of Operation in the SP 800-38 Series

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 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.

Under the auspices of NIST’s Cryptographic Publication Review Board, IR 8459 supports the ongoing review of the Special Publication (SP) 800-38 series, which approves a variety of block cipher modes of operation for encryption and authentication. In particular, IR 8459 surveys relevant research results about the modes and their implementations, and it provides a set of recommendations to improve the corresponding standards.

See additional information about NIST’s cipher modes project.

Released September 10, 2024