Locked Shields 2025: CESNET was at it again

This year, colleagues from CESNET took part in the largest international cyber security exercise Locked Shields 2025, which took place on 5. - Locked Down Shields 2020, held on 9 May under the leadership of the NATO Cooperative Cyber Defence Centre of Excellence (CCDCOE).

This prestigious international event was attended by cyber security experts from 41 countries. During real-life simulations, they faced sophisticated cyber attacks, defended critical infrastructure and had to demonstrate not only technical knowledge but also the ability to work as a team, make quick decisions or deal with the legal and media aspects of a crisis situation.

The CESNET association was represented by Pavla Hlučková, Martin Krajči, Martin Šebela and Pavel Valach, who together with more than 140 other participants represented the Czech Republic. "As part of the Locked Shields exercise, we are members of the so-called Blue Team, whose goal is to get acquainted with the complex infrastructure of the fictitious state of Berylia, analyse this infrastructure, secure it from attackers (Red Team) and then keep it running during attacks. In each Blue Team there are sub-teams focused not only on the technical part, but also, for example, on law, strategy or media. Cooperation across the entire team is therefore key," explains Martin Šebela. 

"Moreover, the infrastructure that we have to take care of as a team for the Locked Shields exercise continues to expand every year - not only in the number of services, but also in the technologies used. Even when you think you are prepared, you often end up finding out what 'spades' the organisers have prepared and what path the attackers have found into the system."

We thank all participants for their excellent representation and commitment. Participating in such a challenging and well-respected event brings valuable experience and also confirms that CESNET is keeping up with the world's top cybersecurity companies.

Photo source: NÚKIB