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NIST SP 800-56B Rev. 2 (Initial Public Draft)

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

Date Published: July 2018
Comments Due: October 5, 2018 (public comment period is CLOSED)
Email Questions to:

Planning Note (08/02/2018): This draft has been modified very slightly from the version originally posted on July 10, 2018: 1) In the Notes to Reviewers (p. iii), item 2 has been updated and item 3 has been deleted; 2) In Appendix E, items 16 and 17 identify specific changes in Section 6.4.1.


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


NIST seeks comments on Draft Special Publication (SP) 800-56B Revision 2, Recommendation for Pair-Wise Key-Establishment Using Integer Factorization Cryptography. This draft publication specifies key agreement and key transport schemes for pairs of entities, and methods for key confirmation are included to provide assurance that both parties share the same keying material. Significant changes to the document are listed in "Notes to Reviewers." A more detailed list of changes is provided in the final appendix.



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

System and Communications Protection


Draft SP 800-56B Rev. 2 (pdf)

Supplemental Material:
Comments received (pdf)

Publication Parts:
SP 800-56A Rev. 3
SP 800-56C Rev. 1

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