http://70.231.62.181/index.php?action=history&feed=atom&title=Data_Authentication_AlgorithmData Authentication Algorithm - Revision history2026-06-29T03:02:10ZRevision history for this page on the wikiMediaWiki 1.45.1http://70.231.62.181/index.php?title=Data_Authentication_Algorithm&diff=9129944&oldid=previmported>Jlwoodwa: tag as one source2024-04-29T18:25:37Z<p>tag as one source</p>
<p><b>New page</b></p><div>{{Short description|Message authentication code algorithm}}<br />
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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 which was withdrawn on September 1, 2008.{{Citation needed|date=July 2021}} The algorithm is not considered secure by today's standards.{{Citation needed|date=July 2021}}<br />
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.<br />
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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).<br />
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==Sources==<br />
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[[Category:Message authentication codes]]<br />
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