What is the highest level of security classification?

The highest level of security classification is "Top Secret." This classification is reserved for information that, if disclosed, could cause exceptionally grave damage to national security. It requires the most stringent handling and access controls, meaning only individuals with the necessary security clearance can view or handle Top Secret information.

This classification is part of a hierarchy used by the U.S. government to protect sensitive information. Below Top Secret are the Secret and Confidential classifications, which denote progressively lower levels of sensitivity and potential impact on national security if improperly disclosed. Restricted is typically not considered a formal security classification level in the same context and usually refers to information that is limited in distribution or access but does not carry the same weight as the official classifications.

Understanding these classifications is crucial for ensuring that sensitive information is properly handled to protect national security interests.