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 SP 800-131A Rev. 2

Transitioning the Use of Cryptographic Algorithms and Key Lengths

Date Published: March 2019

Supersedes: SP 800-131A Rev. 1 (11/06/2015)


Elaine Barker (NIST), Allen Roginsky (NIST)



cryptographic algorithm; digital signatures; encryption; hash function; key agreement; key derivation functions; key management; key transport; key wrapping; message authentication codes; post-quantum algorithms; random number generation; security strength; transition
Control Families

System and Communications Protection; System and Information Integrity


Download URL

Supplemental Material:
Comments received on Draft SP 800-131A Rev. 2 (pdf)

Related NIST Publications:
SP 800-57 Part 1 Rev. 4

Document History:
07/19/18: SP 800-131A Rev. 2 (Draft)
03/21/19: SP 800-131A Rev. 2 (Final)


Security and Privacy

key management