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{{Short description|Message authentication code algorithm}}
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 which was withdrawn on September 1, 2008.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.▼
{{More citations needed|date=July 2021}}
{{one source |date=April 2024}}
According to the standard, a code produced by the DAA is called a '''Data Authentication Code''' ('''DAC'''). The algorithm [[Block cipher modes of operation#Cipher-block chaining (CBC)|chain encrypts]] the data, with the last cipher block truncated and used as the DAC.▼
▲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
▲According to the standard, a code produced by the DAA is called a '''Data Authentication Code''' ('''DAC'''). The algorithm [[Block cipher
The DAA is equivalent to [[ISO/IEC 9797-1]] MAC algorithm 1, or [[CBC-MAC]], with [[Data Encryption Standard|DES]] as the underlying cipher, truncated to between 24 and 56 bits (inclusive).
==Sources==
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