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 DAA is defined in FIPS PUB 113,[1] which was withdrawn on September 1, 2008.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
| |||||||||||||||||||||||||||||
| |||||||||||||||||||||||||||||
gollark: Consider what else you could do with £5 or whatever per month. You could buy 1 to 4 cups of coffee. You could save that amount of money for later use. You could buy random trinkets. You could subscribe to some other random service.
gollark: > Should I get nitro<@585502232397742101> Is, er, fancy emojis and the opportunity to very slightly improve (boost) a server worth £5 or so a month to you?
gollark: Is that just based on number of tests? you could have people be tested multiple times.
gollark: National security reasons.
gollark: You might as well buy lottery tickets because they don't cost much. Despite the negative expected value.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.