Largest Global Cybersecurity Exercise Unites 41 Countries for Enhanced Resilience

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Locked Shields 2026 Exercises Test Cyber Resilience Amidst Growing Threat Landscape

The world’s largest live-fire cyber defense exercise, Locked Shields 2026, recently concluded in Tallinn, Estonia, with 4,016 participants from 41 countries participating in the event.

Organized by the NATO Cooperative Cyber Defence Centre of Excellence (CCDCOE)
Aimed to assess the preparedness of teams in defending against complex cyber threats

Sixteen Multinational Teams Participated

Sixteen multinational teams took part in the competition, which tested their ability to protect critical infrastructure, such as air defense and e-voting platforms, while navigating the challenges of disinformation and political pressure.

Critical infrastructure included air defense and e-voting platforms
Teams navigated disinformation and political pressure

According to Tõnis Saar, Director of the NATO CCDCOE, “the participating teams demonstrated significant improvements in detecting and responding to malicious activity.”

As AI continues to reshape both defensive and offensive capabilities, it is essential for nations to stay ahead of the curve.

Top-Scoring Teams Revealed

The top-scoring teams were comprised of members from various countries, including:

France and Sweden
Latvia and Singapore
Germany, Austria, Luxembourg, and Switzerland

These teams showcased exceptional capabilities in identifying and countering malicious activity.

Exercise Director’s Insights

Dan Ungureanu, Exercise Director, noted that the Locked Shields event has undergone significant changes since its inception in 2010, when just four nations and 60 individuals participated.

This year’s event marked a notable increase in participation, highlighting the growing interest in cyber defense and the need for collective preparation against emerging threats.

Importance of International Cooperation

Exercises like Locked Shields 2026 serve as a crucial platform for nations to assess their preparedness and collaborate on best practices.

The event underscores the importance of international cooperation in addressing the shared challenge of cyber threats and promoting global cyber resilience.