U.S. flag   An unofficial archive of your favorite United States government website
Dot gov

Official websites do not use .rip
We are an unofficial archive, replace .rip by .gov in the URL to access the official website. Access our document index here.


Secure websites use HTTPS
A lock (Dot gov) or https:// means you've safely connected to our website. Please do not share sensitive information with us.

This is an archive
(replace .gov by .rip)

SP 800-56B Rev. 2

Recommendation for Pair-Wise Key-Establishment Using Integer Factorization Cryptography

Date Published: March 2019

Supersedes: SP 800-56B Rev. 1 (10/01/2014)


Elaine Barker (NIST), Lily Chen (NIST), Allen Roginsky (NIST), Apostol Vassilev (NIST), Richard Davis (NSA), Scott Simon (NSA)



assurances; integer factorization cryptography; key agreement; key confirmation; key derivation; key establishment; key management; key recovery; key transport
Control Families

System and Communications Protection


SP 800-56B Rev. 2 (DOI)
Local Download

Supplemental Material:
Comments received on Draft SP 800-56B Rev. 2 (July 2018) (pdf)

Other Parts of this Publication:
SP 800-56A Rev. 3
SP 800-56C Rev. 2

Document History:
07/10/18: SP 800-56B Rev. 2 (Draft)
03/21/19: SP 800-56B Rev. 2 (Final)


Security and Privacy
key management