What does CMAC mean in Advisory?

This page is about the meanings of the acronym/abbreviation/shorthand CMAC in the Business field in general and in the Advisory terminology in particular.

Catholic Marriage Advisory Council

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Definition

What does CMAC mean?

CMAC
In cryptography, CMAC is a block cipher-based message authentication code algorithm. It may be used to provide assurance of the authenticity and, hence, the integrity of binary data. This mode of operation fixes security deficiencies of CBC-MAC. The core of the CMAC algorithm is a variation of CBC-MAC that Black and Rogaway proposed and analyzed under the name XCBC and submitted to NIST. The XCBC algorithm efficiently addresses the security deficiencies of CBC-MAC, but requires three keys. Iwata and Kurosawa proposed an improvement of XCBC and named the resulting algorithm One-Key CBC-MAC in their papers. They later submitted OMAC1, a refinement of OMAC, and additional security analysis. The OMAC algorithm reduces the amount of key material required for XCBC. CMAC is equivalent to OMAC1. To generate an ℓ-bit CMAC tag of a message using a b-bit block cipher and a secret key, one first generates two b-bit sub-keys using the following algorithm. Let ≪ signify a standard left-shift operator: Calculate a temporary value k₀ = Eₖ.

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"CMAC." Abbreviations.com. STANDS4 LLC, 2020. Web. 29 Oct. 2020. <https://www.abbreviations.com/term/2047915>.

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