The Message Authentication Code (MAC) is a cryptographic technique that ensures the integrity and authenticity of a message. A Message Authentication Code is a short piece of information used to authenticate a message and confirm its integrity. Essentially, it helps to verify that a message has not been altered during transmission and that it comes from a legitimate sender. ### Key Features of MAC: 1. **Integrity**: Ensures that the message has not been altered in transit.

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  1. Checksum algorithms
  2. Algorithms
  3. Applied mathematics
  4. Fields of mathematics
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