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  1. What is a data breach? - IBM

    A data breach is any security incident in which unauthorized parties access sensitive or confidential information, including personal data (Social Security numbers, bank account numbers, healthcare …

  2. What Is A Data Breach? Definition, Examples & Prevention

    Sep 20, 2023 · A data breach occurs when unauthorized individuals gain access to confidential information. The consequences of a data breach can be severe and far-reaching. Hackers can use …

  3. What Is a Data Breach? | Microsoft Security

    A data breach is a data security incident when private information or confidential data is stolen or taken from a system without knowledge or permission from the owner.

  4. Data breach - Wikipedia

    A data breach, also known as data leakage, is "the unauthorized exposure, disclosure, or loss of personal information ". [1] Attackers have a variety of motives, from financial gain to political activism, …

  5. Data Breach Explained: Types, Mechanisms, and Their Implications

    Nov 9, 2025 · What Is a Data Breach? A data breach (also known as a data spill or data leak) is unauthorized access and retrieval of sensitive information by an individual, group, or software system.

  6. What is a Data Breach? Types, and Prevention Tips - SentinelOne

    Jul 22, 2025 · Learn what a data breach is, its types, methods, and impacts—plus how to prevent breaches and protect your organization.

  7. What is a Data Breach & How to Prevent Data Leaks - Kaspersky

    To define data breach: a data breach exposes confidential, sensitive, or protected information to an unauthorized person. The files in a data breach are viewed and/or shared without permission. …

  8. What is a data breach? - Cloudflare

    What is a data breach? A data breach is the release of confidential, private, or otherwise sensitive information into an unsecured environment. A data breach can occur accidentally, or as the result of …

  9. What Is a Data Breach? Definition, Causes & Prevention

    Jan 1, 2026 · A data breach is a security incident where unauthorized parties gain access to confidential or sensitive information. This includes customer records and employee credentials.

  10. Data Breach: Meaning, Causes, Examples & How to Prevent It

    Jul 22, 2025 · Learn what a data breach is, common causes, major real-world examples, and steps you can take to keep your personal or business data safe from leaks.