What is the role of the National Security Agency (NSA) regarding classified information?

The role of the National Security Agency (NSA) primarily revolves around the protection of national security, which it accomplishes through the use of cryptography and the analysis of information. The NSA's key mission includes the collection, processing, and dissemination of intelligence information from a variety of sources. This involves ensuring that classified information is secured from unauthorized access and that sensitive data is accurately interpreted to inform national policies and activities.

While the NSA plays a significant role in securing classified information, it does not handle personnel matters associated with classified staff or provide security clearances for all government employees. Security clearances are typically granted by the Office of Personnel Management (OPM) or other designated entities. Additionally, although physical security is crucial for protecting sensitive information, it is not the primary focus of the NSA; this function is often carried out by other agencies that specialize in physical security measures across government facilities.