What aspect of national security does Executive Order 13526 primarily address?

Executive Order 13526 specifically addresses the classification of information, establishing the framework for how information is classified within the United States government. This order outlines the criteria for what constitutes classified information, the levels of classification, and the protocols for marking and handling such information. By providing clear definitions and procedures, the Executive Order ensures that sensitive information is appropriately protected while also allowing for transparency and accountability where necessary.

The other aspects mentioned, such as national defense architecture, diplomatic relations management, and intelligence community funding, fall outside the scope of this Executive Order. Instead, they deal with broader strategic or operational elements of national security rather than the specifics of information classification. Therefore, the focus on classification in Executive Order 13526 makes it a crucial policy for protecting national security through the controlled dissemination and safeguarding of sensitive information.