What is a security breach?

Security Breach:

An act from outside an organization that bypasses or contravenes security policies, practices, or procedures. A similar internal act is called security violation.

Why Is It Important?
Target suffered from one of the biggest security breaches in recent history at the end of 2013. The company initially reported in mid-December that approximately 40 million customers may have fallen victim of the security breach, which could lead to their credit and debit card information being stolen. However, the retail giant more recently announced that it is closer to 70 million customers that may have been affected including theft of their name, phone number, email address, and home address compromised. This breach lasted approximately 19 days, including one of the biggest shopping days of the year, Black Friday. While these large security breaches are rare, some are speculating that they may become more common unless we increase cyber security.