Data Authentication Algorithm
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 DAA is defined in FIPS PUB 113,[1] which was withdrawn on September 1, 2008. The algorithm is not considered secure by today's standards.
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
- FIPS PUB 113 - Computer Data Authentication - the Federal Information Processing Standard publication that defines the Data Authentication Algorithm
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gollark: The names don't correspond to actual dimensions now, though.
gollark: Although progress on that is slowing down.
gollark: Maybe it'll be practical *eventually*. We've got a-few-nanometres-or-so-accuracy fabrication for silicon stuff.
gollark: It's probably one of those things which could be very nice if you could actually make it at all somehow.
gollark: Fair. Maybe there's a gap in the market for better online teaching of this stuff, somehow.
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