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National security covers over ten major fields, including political security, homeland security, military security, economic security, cultural security, public security, science and technology security, cyber security, ecological security, resource security, nuclear security, overseas interests security, biosecurity, outer space security, deep sea security and polar security.

Political Security Homeland Security Military Security Economic Security Cultural Security Public Security Science And Technology Security Cyber Security Ecological Security Resource Security Nuclear Security Overseas Interests Security Biosecurity Outer Space Security Deep Sea Security Polar Security