ROK: U.S. Intelligence Cooperation

A security cooperation system in which South Korea and the United States share and analyze military and security intelligence based on their alliance.

ROK–U.S. Intelligence Cooperation

Overview

ROK–U.S. intelligence cooperation is a security cooperation system based on the 1953 ROK–U.S. Mutual Defense Treaty (한미상호방위조약), through which South Korea and the United States share information and conduct joint analysis across areas such as North Korean threats, regional security, cyber, and space. Through their military alliance and combined defense system, the two countries carry out near-real-time intelligence exchange and threat assessments, serving as a core pillar for maintaining deterrence and early-warning capabilities.

Main Elements

Institutional Basis

ROK–U.S. intelligence cooperation is built on the alliance structure, including the ROK–U.S. Mutual Defense Treaty, the Combined Forces Command (연합사령부) system, and the stationing of U.S. Forces Korea. On the South Korean side, the National Intelligence Service (국가정보원), Ministry of National Defense (국방부), Joint Chiefs of Staff (합동참모본부), and Defense Intelligence Agency (국방정보본부) participate; on the U.S. side, the Department of Defense, Office of the Director of National Intelligence (DNI) (국가정보국), Central Intelligence Agency (CIA) (중앙정보국), and National Security Agency (NSA) (국가안보국) participate. The two countries share necessary information while protecting classified information through information protection agreements and mutual visit and exchange programs.

Military and Security Intelligence

The core is early warning and threat assessment regarding North Korea's nuclear and missile threats. The ROK and U.S. use combined surveillance assets and intelligence collection means to track North Korean mobile launchers, missile tests, and nuclear facility activities, and exchange information needed to maintain the combined defense posture. They also share battlefield, geographic, and meteorological information needed to establish and execute combined operational plans in contingencies on the Korean Peninsula.

Counterterrorism, Cyber, and Transnational Threats

Intelligence cooperation is also expanding against transnational threats such as international terrorism, cyberattacks, maritime and aviation security, and the proliferation of weapons of mass destruction. In particular, in response to cyber threats, the two countries are strengthening the sharing of incident information, malware analysis, and threat intelligence. In the space and electromagnetic spectrum domains, the need to share information from surveillance and reconnaissance assets is also growing.

ROK–U.S.–Japan Trilateral Cooperation

Recently, ROK–U.S.–Japan security cooperation has emerged as an important axis of intelligence sharing. After the 2023 Camp David summit, a real-time sharing system for North Korean missile warning data was launched, and trilateral consultations on maritime, cyber, and economic security intelligence are being institutionalized. This is developing in a direction that complements bilateral ROK–U.S. cooperation and strengthens regional deterrence.

Recent Developments

In 2024–2025, deepening North Korea–Russia military cooperation, the advancement of North Korea's nuclear and missile programs, and the expansion of cyber and supply chain threats emerged as major variables in ROK–U.S. intelligence cooperation. The two countries are strengthening intelligence sharing on the possibility of weapons and technology transfers between North Korea and Russia, and are expanding into advanced technology-based cooperation such as AI-based threat analysis, linkage of space surveillance assets, and automated sharing of cyber threat intelligence. In addition, assessments have emerged that managing intelligence trust and continuity in the alliance became important amid South Korea's political instability in late 2024. In 2025, along with the continuity of ROK–U.S.–Japan trilateral cooperation, discussions continue on expanding the scope of intelligence sharing to economic security, supply chains, and the protection of emerging technologies.