Dworkin, M.
(2007),
Recommendation for Block Cipher Modes of Operation: Galois/Counter Mode (GCM) and GMAC, Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=51288
(Accessed October 2, 2025)
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.
Recommendation for Block Cipher Modes of Operation: Galois/Counter Mode (GCM) and GMAC
Published
Author(s)
Abstract
This Recommendation specifies the Galois/Counter Mode (GCM), an algorithm for authenticated encryption with associated data, and its specialization, GMAC, for generating a message authentication code (MAC) on data that is not encrypted. GCM and GMAC are modes of operation for an underlying approved symmetric key block cipher.Citation
Special Publication (NIST SP) - 800-38D
Report Number
800-38D
NIST Pub Series
Pub Type
NIST Pubs
Download Paper
Keywords
authenticated encryption, authentication, block cipher, confidentiality, cryptography, encryption, information security, mode of operation
Citation
Issues
If you have any questions about this publication or are having problems accessing it, please contact [email protected].
Created November 28, 2007, Updated January 27, 2020