Skip to main content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.


The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

NIST Seeks Comments on Draft SP 800-131A Rev. 2: Transitioning the Use of Crypto Algorithms and Key Lengths

NIST is updating its guidance for transitioning to the use of stronger cryptographic keys and more robust algorithms by federal agencies to protect sensitive, but unclassified, information. These transitions are meant to address the challenges posed by new cryptanalysis, the increasing power of classical computing technology, and the potential emergence of quantum computers.

Draft Special Publication (SP) 800-131A Revision 2, Transitioning the Use of Cryptographic Algorithms and Key Lengths, is now available for public comment. This revision includes a strategy and schedule for retiring the use of the Triple Data Encryption Algorithm (TDEA). Other proposed changes are listed in Appendix B. Please provide comments by September 7, 2018 to, with "SP 800-131A comments" in the subject line.

Released July 19, 2018, Updated December 11, 2018