What term describes data that is restricted to authorized persons under a non-disclosure agreement (NDA)?

The term that describes data restricted to authorized persons under a non-disclosure agreement (NDA) is "confidential." This classification implies that the information is private and should only be disclosed to individuals who have been granted permission, typically through legal means such as an NDA. The intent of classifying data as confidential is to protect sensitive information from unauthorized access, ensuring that only those with a legitimate need to know can access it.

Confidential data often includes proprietary business information, intellectual property, and any other information that could be detrimental if disclosed. Organizations implement NDAs and other protective measures to safeguard this type of data, reinforcing its importance.

In contrast, the other terms relate to varying levels of sensitivity and classification of information but do not specifically encompass the legal protections offered by NDAs. "Unclassified" refers to information that is not restricted and is accessible to the general public. "Secret" and "Top Secret" indicate higher levels of sensitivity typically associated with governmental or military data requiring more stringent security measures.