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{{More citations needed|date=July 2021}}
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The '''Data Authentication Algorithm''' ('''DAA''') is a former [[Federal Information Processing Standard|U.S. government standard]] for producing cryptographic [[message authentication code]]s. DAA is defined in FIPS PUB 113,<ref>[http://csrc.nist.gov/publications/fips/fips113/fips113.html FIPS PUB 113 - Computer Data Authentication] - the [[Federal Information Processing Standard]] publication that defines the Data Authentication Algorithm</ref> which was withdrawn on September 1, 2008. The algorithm is not considered secure by today's standards.


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The '''Data Authentication Algorithm''' ('''DAA''') is a former [[Federal Information Processing Standard|U.S. government standard]] for producing cryptographic [[message authentication code]]s. DAA is defined in FIPS PUB 113,<ref>[http://csrc.nist.gov/publications/fips/fips113/fips113.html FIPS PUB 113 – Computer Data Authentication] – the [[Federal Information Processing Standard]] publication that defines the Data Authentication Algorithm</ref> which was withdrawn on September 1, 2008.{{Citation needed|date=July 2021}} The algorithm is not considered{{by whom?}} secure by today's standards.{{Citation needed|date=July 2021}}
According to the standard, a code produced by the DAA is called a '''Data Authentication Code''' ('''DAC'''). The algorithm [[Block cipher mode of operation#Cipher block chaining (CBC)|chain encrypts]] the data, with the last cipher block truncated and used as the DAC.
According to the standard, a code produced by the DAA is called a '''Data Authentication Code''' ('''DAC'''). The algorithm [[Block cipher mode of operation#Cipher block chaining (CBC)|chain encrypts]] the data, with the last cipher block truncated and used as the DAC.


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==Sources==
==Sources==
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Revision as of 14:21, 13 July 2021

The Data Authentication Algorithm (DAA) is a former U.S. government standard for producing cryptographic message authentication codes. DAA is defined in FIPS PUB 113,[1] which was withdrawn on September 1, 2008.[citation needed] The algorithm is not considered[by whom?] secure by today's standards.[citation needed] According to the standard, a code produced by the DAA is called a Data Authentication Code (DAC). The algorithm chain encrypts the data, with the last cipher block truncated and used as the DAC.

The DAA is equivalent to ISO/IEC 9797-1 MAC algorithm 1, or CBC-MAC, with DES as the underlying cipher, truncated to between 24 and 56 bits (inclusive).

Sources

  1. ^ FIPS PUB 113 – Computer Data Authentication – the Federal Information Processing Standard publication that defines the Data Authentication Algorithm


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