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 800-185 SHA-3 Derived Functions: cSHAKE, KMAC, TupleHash, and ParallelHash Share to Facebook Share to X Share to LinkedIn Share ia Email Documentation Topics Date Published: December 2016 Planning Note ( 03/13/2025 ): NIST has decided to revise this publication. See this announcement for more details. Author(s) John Kelsey (NIST) , Shu-jen Chang (NIST) , Ray Perlner (NIST) Abstract This Recommendation specifies four SHA-3-derived functions: cSHAKE, KMAC, TupleHash, and ParallelHash. cSHAKE is a customizable variant of the SHAKE functions defined in FIPS 202. KMAC (for KECCAK Message Authentication Code) is a variable-length message authentication code algorithm based on KECCAK; it can also be used as a pseudorandom function. TupleHash is a variable-length hash function designed to hash tuples of input strings unambiguously. ParallelHash is a variable-length hash function that can hash very long messages in parallel. This Recommendation specifies four SHA-3-derived functions: cSHAKE, KMAC, TupleHash, and ParallelHash. cSHAKE is a customizable variant of the SHAKE functions defined in FIPS 202. KMAC (for KECCAK Message Authentication Code) is a variable-length message authentication code algorithm based on... See full abstract This Recommendation specifies four SHA-3-derived functions: cSHAKE, KMAC, TupleHash, and ParallelHash. cSHAKE is a customizable variant of the SHAKE functions defined in FIPS 202. KMAC (for KECCAK Message Authentication Code) is a variable-length message authentication code algorithm based on KECCAK; it can also be used as a pseudorandom function. TupleHash is a variable-length hash function designed to hash tuples of input strings unambiguously. ParallelHash is a variable-length hash function that can hash very long messages in parallel. Hide full abstract Keywords authentication ; cryptography ; cSHAKE ; customizable SHAKE function ; hash function ; information security ; integrity ; KECCAK ; KMAC ; message authentication code ; parallel hashing ; ParallelHash ; PRF ; pseudorandom function ; SHA-3 ; SHAKE ; tuple hashing ; TupleHash Control Families Identification and Authentication ; System and Information Integrity Documentation Publication: https://doi.org/10.6028/NIST.SP.800-185 Download URL Supplemental Material: Comments Received on Draft SP 800-185 (pdf) Related NIST Publications: FIPS 202 Document History: 12/22/16: SP 800-185 (Final) Topics Security and Privacy authentication , message authentication , random number generation , secure hashing Laws and Regulations E-Government Act 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