+A Message Authentication Code (MAC) is a small piece of data verifying a message's authenticity and integrity. It confirms the data hasn't been altered and originates from an expected sender, often using a [Secret Key](/wiki/secret_key) for cryptographic assurance. This ensures that a message remains trustworthy and free from [Data Tampering](/wiki/data_tampering).
+## See also
+- [Cryptography](/wiki/cryptography)
+- [Digital Signature](/wiki/digital_signature)
+- [Hash Function](/wiki/hash_function)
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