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Mitch Ames (talk | contribs) Undid revision 466742432 by 198.242.211.102 (talk) rvt WP:COPYVIO (from FIPS PUB 113 |
Mitch Ames (talk | contribs) add a brief summary of the algorithm |
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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. According to the standard, a code produced by the DAA is called a '''Data Authentication Code''' ('''DAC'''). The algorithm is not considered secure by today's standards.
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 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).
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