Authentication is the process of verifying the identity of a user, system, or message. It is a necessary step in the process of access control, as it establishes who will be granted access and what actions they will be allowed to perform.
A digital signature is a mathematical scheme for verifying the authenticity of digital messages or documents. It verifies the authenticity and integrity of a message using the sender's private key.
Integrity, in cybersecurity, is the assurance that information can only be accessed or modified by those authorized to do so. Integrity involves maintaining the consistency, accuracy, and trustworthiness of data over its entire life cycle.
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