The NATO Cooperative Cyber Defence Centre of Excellence (CCDCOE) in Tallinn, Estonia, final week hosted the fifteenth version of the Locked Shields cyber protection train.
Roughly 4,000 specialists from 41 nations took half in Locked Shields 2025, which is designed to check and enhance the preparedness of cybersecurity groups in defending nationwide programs and important infrastructure by a practical simulation.
Whereas at the moment it’s the world’s largest and most advanced cyber protection train, Locked Shields had humble beginnings.
“Over the previous 15 years, Locked Shields has grown considerably—each within the variety of taking part nations and the complexity of the programs concerned. When the primary train was held in 2010, it included simply 4 nations and 60 individuals,” Dan Ungureanu, train director of Locked Shields 2025, advised SecurityWeek.
“This progress can be mirrored within the measurement of the planning and assist groups,” Ungureanu added. “Locked Shields is organised in cooperation with main specialists from the cyber business, academia, and allied cyber defence forces. The 2025 version was a collaborative effort involving 450 planners and builders and greater than 25 business companions.”
The cybersecurity specialists who took half in Locked Shields 2025 had been tasked with defending greater than 8,000 programs — together with ones simulating navy infrastructure and telecom networks — towards greater than 8,000 cyberattacks.
The 41 taking part nations shaped 17 multinational groups in an effort to reinforce collaboration. All of them joined the train remotely, nevertheless it was as much as every workforce to determine whether or not they logged in from their respective nation or gathered in a single location.
Locked Shields examined not solely every workforce’s technical abilities, but additionally their capacity to cope with disinformation and political stress, they usually had been tasked with navigating authorized and strategic features that might happen in high-pressure eventualities.Commercial. Scroll to proceed studying.
The three groups that obtained the best rating had been made up of Germany and Singapore, Poland and France, and Italy, Slovenia and america. Nonetheless, this doesn’t essentially imply that these international locations are the most effective ready to cope with cyber threats.
“Excessive scores in Locked Shields reveal sturdy teamwork, technical experience, and decision-making beneath stress in a practical simulated setting,” Ungureanu mentioned. “Nonetheless, they don’t straight signify a rustic’s total cybersecurity readiness, as groups differ in composition and objectives every year. The train runs inside a restricted timeframe and doesn’t totally account for nationwide infrastructure or long-term capabilities.”
The evolution of Locked Shields displays the numerous progress of cyber protection and the growing want for international locations to be ready for worst case eventualities.
Ungureanu famous that international locations often encounter cyberattacks much like these simulated in Locked Shields, akin to ransomware, disruptions to important infrastructure, and different subtle threats geared toward authorities and protection networks.
“Though many of those incidents go unreported publicly, cybersecurity professionals, together with Locked Shields individuals, are sometimes on the entrance strains, figuring out and neutralising threats earlier than they escalate into main incidents,” he mentioned.
Locked Shields 2025 launched a cloud-based infrastructure, quantum computing injects, AI-driven narratives, and a redesigned scoring system that rewarded collaboration and resilience.
As for subsequent yr’s occasion, Ungureanu mentioned, “For Locked Shields 2026, we’ll be specializing in increasing the cloud phase by integrating further programs and introducing a brand new class of Crucial Particular Methods that may assist and strengthen nationwide defence efforts. As with this yr, we’ll additionally proceed advancing our inner AI analysis, bringing us one step nearer to a totally automated Blue Crew.”
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