Which of the following is a security incident in which sensitive or confidential data is copied,
transmitted, viewed, or stolen by unauthorized person?

A.
Security token

B.
Data masking

C.
Data breach

D.
Data erasure

Explanation:
A data breach is the planned or unplanned release of secure information to an environment that is not trusted. Incidents range from concerted attack by black hats with the backing of organized crime or national governments to careless disposal of used computer equipment or data storage media.

A data breach is a security incident in which sensitive or confidential data is copied- transmitted, viewed, or stolen by unauthorized person. Financial information like credit card or bank details, personal health information (PHI), personally identifiable information (PII), and trade secrets of corporations or intellectual property can also be involved in a data breach. Answer options A, D, and B are incorrect. These are not valid options.