What is considered a "security breach"?

A "security breach" refers specifically to an incident in which unauthorized individuals gain access to sensitive information or data. This can involve various forms of unauthorized data access, such as hacking, phishing, or insider threats. The key element of a security breach is that it violates the confidentiality and integrity of information, putting it at risk of misuse or exposure.

In contrast, an increase in security personnel typically indicates a proactive measure to enhance security rather than a breach. Regular security checks are routine practices aimed at preventing breaches and ensuring that security measures are functioning effectively. A change in security policy reflects an evolution in security procedures or guidelines but does not inherently indicate a breach. Therefore, the definition of a security breach aligns precisely with incidents where unauthorized access compromises information security.