How is a data breach defined?

• A. Unauthorized access to sensitive data
• B. A natural disaster affecting data integrity
• C. The loss of data backups
• D. Accidental data deletion

Answer: (A)

A data breach is defined as the unauthorized access to sensitive data. This definition encompasses situations where individuals or entities gain access to information without permission, which could include personal identification information, financial records, health records, or any confidential data protected by security measures. The key aspect of a data breach is the illegitimacy of access; it signifies a failure in security measures, resulting in compromised data integrity and confidentiality.

In contrast, the other options do not align with the formal definition of a data breach. A natural disaster affecting data integrity pertains to environmental factors that may cause loss or damage to data rather than unauthorized access. The loss of data backups focuses on data recovery issues rather than breaches of security. Accidental data deletion involves an unintentional action rather than an unauthorized intervention. Thus, understanding that a breach primarily involves illicit access helps in recognizing the critical risks and defensive measures essential in network security.