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Building a robust U.S.-ROK cyber alliance

President Donald Trump hosts a bilateral meeting with President Lee Jae-myung of the Republic of Korea, Monday, August 25, 2025, in the Oval Office. (Official White House Photo by Emily J. Higgins.)

By Sunha Bae, Julia Brock, Donghee Kim, Yena Kim, James Andrew Lewis and Joohui Park

A new CSIS report, Building a Robust U.S.-ROK Cyber Alliance: A Joint Cyber Resilience Strategy, examines how the United States and South Korea can strengthen bilateral cyber cooperation in response to an increasingly complex and transnational threat environment.

As cyber operations from North Korea, China, and Russia grow in scale and sophistication, the report argues that existing approaches are insufficient to ensure resilience or deterrence.

The report proposes a more integrated framework for cyber defense, centered on shared situational awareness, improved attribution capabilities, and a shift toward proactive and active cyber defense strategies. It introduces a Cyberattack Severity Classification Framework (CSCF) to support consistent decisionmaking and highlights the need to align cyber policy with broader law enforcement, financial, and diplomatic tools. 

Read more at Center for Strategic and International Studies

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