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Cryptographic Hash

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Cryptographic Module Validation Program. Logo of the Cryptographic Module Validation Program.

Cryptographic Module Validation Program

The Cryptographic Module Validation Program (CMVP) is a joint American and Canadian security accreditation program for cryptographic modules. The program is available to any vendors who seek to have their products certified for use by the U.S. Government and regulated industries (such as financial and health-care institutions) that collect, store, transfer, share and disseminate "sensitive, but not classified" information. All of the tests under the CMVP are handled by third-party laboratories that are accredited as Cryptographic Module Testing Laboratories by the National Voluntary Laboratory Accreditation Program (NVLAP). Product certifications under the CMVP are performed in accordance with the requirements of FIPS 140-2. The CMVP was established by the U.S. See also[edit] Cryptographic Algorithm Validation Program (CAVP) Comparison of cryptographic hash functions. Cryptographic hash function. A cryptographic hash function (specifically, SHA-1) at work.

Cryptographic hash function

Note that even small changes in the source input (here in the word "over") drastically change the resulting output, by the so-called avalanche effect. A cryptographic hash function is a hash function which is considered practically impossible to invert, that is, to recreate the input data from its hash value alone.

These one-way hash functions have been called "the workhorses of modern cryptography".[1] The input data is often called the message, and the hash value is often called the message digest or simply the digest. The ideal cryptographic hash function has four main properties: it is easy to compute the hash value for any given messageit is infeasible to generate a message from its hashit is infeasible to modify a message without changing the hashit is infeasible to find two different messages with the same hash. §Properties[edit] A function meeting these criteria may still have undesirable properties.

MD5 (Cryptographic Hash)

SHA-1. In cryptography, SHA-1 is a cryptographic hash function designed by the United States National Security Agency and is a U.S.


Federal Information Processing Standard published by the United States NIST.[2] SHA-2. SHA-2 is a set of cryptographic hash functions (SHA-224, SHA-256, SHA-384, SHA-512, SHA-512/224, SHA-512/256) designed by the U.S.


National Security Agency (NSA) and published in 2001 by the NIST as a U.S. Federal Information Processing Standard (FIPS). SHA stands for Secure Hash Algorithm. SHA-2 includes a significant number of changes from its predecessor, SHA-1. SHA-2 currently consists of a set of six hash functions with digests that are 224, 256, 384 or 512 bits.

National Institute of Standards and Technology. The National Institute of Standards and Technology (NIST), known between 1901 and 1988 as the National Bureau of Standards (NBS), is a measurement standards laboratory, also known as a National Metrological Institute (NMI), which is a non-regulatory agency of the United States Department of Commerce.

National Institute of Standards and Technology

The institute's official mission is to:[1] Promote U.S. innovation and industrial competitiveness by advancing measurement science, standards, and technology in ways that enhance economic security and improve our quality of life. NIST had an operating budget for fiscal year 2007 (October 1, 2006-September 30, 2007) of about $843.3 million. NIST's 2009 budget was $992 million, and it also received $610 million as part of the American Recovery and Reinvestment Act.[2] NIST employs about 2,900 scientists, engineers, technicians, and support and administrative personnel. History[edit] Initial mandate[edit] History[edit] Metric system[edit] Organization[edit] Boulder Laboratories.

SHA-3. SHA-3, a subset of the cryptographic primitive family Keccak (/ˈkætʃæk/, or /kɛtʃɑːk/),[3][4] is a cryptographic hash function designed by Guido Bertoni, Joan Daemen, Michaël Peeters, and Gilles Van Assche, building upon RadioGatún.


On October 2, 2012, Keccak was selected as the winner of the NIST hash function competition.[3] SHA-3 is not meant to replace SHA-2, as no significant attack on SHA-2 has been demonstrated. Because of the successful attacks on MD5 and SHA-0 and theoretical attacks on SHA-1 and SHA-2,[5] NIST perceived a need for an alternative, dissimilar cryptographic hash, which became SHA-3. SHA-3 uses the sponge construction[6][7] in which message blocks are XORed into the initial bits of the state, which is then invertibly permuted. In the version used in SHA-3, the state consists of a 5×5 array of 64-bit words, 1600 bits total. The authors claim 12.5 cycles per byte[8] on an Intel Core 2 CPU. The block permutation[edit] θ ρ π χ ι. Security Technology Related to Math. REF - Hash Algorithms. Hash Cracking.