A Message Authentication Code (MAC) is a cryptographic construct that ensures data integrity and authenticity by allowing verifiers to detect any alterations to the message content. It uses a secret key shared between the sender and receiver to generate a unique tag for each message, which is then used to verify that the message has not been tampered with during transmission.

Message Authentication Code

cryptographic construct

Data integrity refers to the accuracy, consistency, and reliability of data throughout its lifecycle, ensuring that it remains unaltered and trustworthy for decision-making and analysis. It is crucial for maintaining the credibility of databases and information systems, and involves various practices and technologies to prevent unauthorized access or corruption.

data integrity

Data authenticity refers to the assurance that data is genuine, unaltered, and originates from a verified source, which is crucial for maintaining trust in digital communications and transactions. Ensuring data authenticity involves implementing cryptographic techniques and verification processes to protect against tampering and impersonation.

Data Authenticity

A secret key is a cryptographic key used in symmetric encryption algorithms where the same key is employed for both encryption and decryption of data, ensuring confidentiality. It must be kept confidential to prevent unauthorized access, as anyone possessing the key can decrypt the protected information.

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