You are viewing this page in an unauthorized frame window. This is a potential security issue, you are being redirected to https://csrc.nist.gov . An official website of the United States government Here’s how you know Here’s how you know Official websites use .gov A .gov website belongs to an official government organization in the United States. Secure .gov websites use HTTPS A lock ( Lock Locked padlock icon ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites. Search Search CSRC MENU Search Search Projects Publications Expand or Collapse Drafts for Public Comment All Public Drafts Final Pubs FIPS (standards) Special Publications (SP s ) IR (interagency/internal reports) CSWP (cybersecurity white papers) ITL Bulletins Project Descriptions Journal Articles Conference Papers Books Topics Expand or Collapse Security & Privacy Applications Technologies Sectors Laws & Regulations Activities & Products News & Updates Events Glossary About CSRC Expand or Collapse Computer Security Division Cryptographic Technology Software Security Group Hardware Security Group Security Engineering and Risk Management Applied Cybersecurity Division Cybersecurity and Privacy Applications National Cybersecurity Center of Excellence (NCCoE) National Initiative for Cybersecurity Education (NICE) Contact Us Information Technology Laboratory Computer Security Resource Center Publications NIST SP 800-56B Rev. 2 Recommendation for Pair-Wise Key-Establishment Using Integer Factorization Cryptography Share to Facebook Share to X Share to LinkedIn Share ia Email Documentation Topics Date Published: March 2019 Supersedes: SP 800-56B Rev. 1 (10/01/2014) Planning Note ( 01/06/2026 ): This publication has been reaffirmed as current as of January 6, 2026. See this announcement for more details. Author(s) Elaine Barker (NIST) , Lily Chen (NIST) , Allen Roginsky (NIST) , Apostol Vassilev (NIST) , Richard Davis (NSA) , Scott Simon (NSA) Abstract This Recommendation specifies key-establishment schemes using integer factorization cryptography (in particular, RSA). Both key-agreement and key transport schemes are specified for pairs of entities, and methods for key confirmation are included to provide assurance that both parties share the same keying material. In addition, the security properties associated with each scheme are provided. This Recommendation specifies key-establishment schemes using integer factorization cryptography (in particular, RSA). Both key-agreement and key transport schemes are specified for pairs of entities, and methods for key confirmation are included to provide assurance that both parties share the same... See full abstract This Recommendation specifies key-establishment schemes using integer factorization cryptography (in particular, RSA). Both key-agreement and key transport schemes are specified for pairs of entities, and methods for key confirmation are included to provide assurance that both parties share the same keying material. In addition, the security properties associated with each scheme are provided. Hide full abstract Keywords assurances ; integer factorization cryptography ; key agreement ; key confirmation ; key derivation ; key establishment ; key management ; key recovery ; key transport Control Families System and Communications Protection Documentation Publication: https://doi.org/10.6028/NIST.SP.800-56Br2 Download URL Supplemental Material: Comments received on Draft SP 800-56B Rev. 2 (July 2018) (pdf) Publication Parts: 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) Topics Security and Privacy key management HEADQUARTERS 100 Bureau Drive Gaithersburg, MD 20899 X (link is external) facebook (link is external) linkedin (link is external) instagram (link is external) youtube (link is external) rss govdelivery (link is external) Want updates about CSRC and our publications? Subscribe Contact Us | Our Other Offices Send inquiries to [email protected] Site Privacy Accessibility Privacy Program Copyrights Vulnerability Disclosure No Fear Act Policy FOIA Environmental Policy Scientific Integrity Information Quality Standards Commerce.gov Science.gov USA.gov Vote.gov