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 FIPS 202 SHA-3 Standard: Permutation-Based Hash and Extendable-Output Functions Share to Facebook Share to X Share to LinkedIn Share ia Email Documentation Topics Date Published: August 2015 Planning Note ( 03/13/2025 ): NIST has decided to update this publication. See this announcement for more details. A typographical error has been identified in (non-normative) Appendix B, on page 26. In the description of Algorithm 10, step 1 begins: 1. For each integer \(i\) such that \(0 \leq i < 2m-1 , \dots\) but instead the correct notation should be: 1. For each integer \(i\) such that \(0 \leq i < 2m, \dots\) This correction will be incorporated in any future revision of this standard. Author(s) National Institute of Standards and Technology Abstract This Standard specifies the Secure Hash Algorithm-3 (SHA-3) family of functions on binary data. Each of the SHA-3 functions is based on an instance of the K ECCAK algorithm that NIST selected as the winner of the SHA-3 Cryptographic Hash Algorithm Competition. This Standard also specifies the K ECCAK -p family of mathematical permutations, including the permutation that underlies K ECCAK , in order to facilitate the development of additional permutation-based cryptographic functions. The SHA-3 family consists of four cryptographic hash functions, called SHA3-224, SHA3-256, SHA3-384, and SHA3-512, and two extendable-output functions (XOFs), called SHAKE128 and SHAKE256. Hash functions are components for many important information security applications, including 1) the generation and verification of digital signatures, 2) key derivation, and 3) pseudorandom bit generation. The hash functions specified in this Standard supplement the SHA-1 hash function and the SHA-2 family of hash functions that are specified in FIPS 180-4, the Secure Hash Standard. Extendable-output functions are different from hash functions, but it is possible to use them in similar ways, with the flexibility to be adapted directly to the requirements of individual applications, subject to additional security considerations. This Standard specifies the Secure Hash Algorithm-3 (SHA-3) family of functions on binary data. Each of the SHA-3 functions is based on an instance of the KECCAK algorithm that NIST selected as the winner of the SHA-3 Cryptographic Hash Algorithm Competition. This Standard also specifies the... See full abstract This Standard specifies the Secure Hash Algorithm-3 (SHA-3) family of functions on binary data. Each of the SHA-3 functions is based on an instance of the K ECCAK algorithm that NIST selected as the winner of the SHA-3 Cryptographic Hash Algorithm Competition. This Standard also specifies the K ECCAK -p family of mathematical permutations, including the permutation that underlies K ECCAK , in order to facilitate the development of additional permutation-based cryptographic functions. The SHA-3 family consists of four cryptographic hash functions, called SHA3-224, SHA3-256, SHA3-384, and SHA3-512, and two extendable-output functions (XOFs), called SHAKE128 and SHAKE256. Hash functions are components for many important information security applications, including 1) the generation and verification of digital signatures, 2) key derivation, and 3) pseudorandom bit generation. The hash functions specified in this Standard supplement the SHA-1 hash function and the SHA-2 family of hash functions that are specified in FIPS 180-4, the Secure Hash Standard. Extendable-output functions are different from hash functions, but it is possible to use them in similar ways, with the flexibility to be adapted directly to the requirements of individual applications, subject to additional security considerations. Hide full abstract Keywords hash function ; information security ; message digest ; permutation ; SHA-3 ; sponge construction ; sponge function ; cryptography ; extendable-output function ; Federal Information Processing Standard ; KECCAK ; XOF ; hash algorithm ; computer security Control Families None selected Documentation Publication: https://doi.org/10.6028/NIST.FIPS.202 Download URL Supplemental Material: Federal Register Notice Press Release Comments received on Draft FIPS 202 (pdf) Draft FIPS 202 (May 2014) (pdf) Related NIST Publications: ITL Bulletin SP 800-185 IR 7896 IR 7764 IR 7620 Document History: 08/04/15: FIPS 202 (Final) Topics Security and Privacy authentication , secure hashing 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