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  1. What Is Authentication? Definition and Methods | Microsoft Security

    Authentication is the process that an individual, application, or service goes through to prove their identity before gaining access to digital systems.

  2. Authentication - Wikipedia

    Authentication ATM user authenticating himself Authentication (from Greek: αὐθεντικός authentikos, "real, genuine", from αὐθέντης authentes, "author") is the act of proving an assertion, such as the …

  3. What is authentication? - IBM

    What is authentication? In a computer system, authentication (“auth” for short) is the process that verifies that a user is who they claim to be. Most authentication systems rely on authentication …

  4. What is Authentication?Types, Roles & How it Works!

    Sep 27, 2024 · Authentication is verifying a user's or system's identity. Types - Single-Factor Authentication and Two-Factor Authentication.

  5. What is authentication? - Cloudflare

    In cyber security, authentication is the process of verifying an entity's identity. Learn about the different types of authentication that access control systems use.

  6. What is Authentication? Process, Methods & Cybersecurity Guide

    Mar 29, 2021 · Authentication Explained: What it is, How it Works, and Why it Matters in Cybersecurity Authentication is the process of verifying a user’s or system’s identity before granting access. It …

  7. What is Authentication? Definition and uses - Auth0

    Authentication is a term that refers to the process of proving that some fact or some document is genuine. In computer science, this term is typically associated with proving a user’s identity. Usually, …

  8. AUTHENTICATION Definition & Meaning - Merriam-Webster

    The meaning of AUTHENTICATION is an act, process, or method of showing something (such as an identity, a piece of art, or a financial transaction) to be real, true, or genuine : the act or process of …

  9. What Is User Authentication? A 2025 Guide - Frontegg

    Aug 19, 2024 · What is user authentication? User authentication is the process of verifying a person’s identity before granting access to a system, application, or resource. It’s how systems confirm that a …

  10. What Is Authentication? - Coursera

    Oct 21, 2025 · Token-based authentication: Token-based authentication is a form of two-factor authentication that requires users to provide either a physical or digital token to prove their identity …