ICSSS 2025 contributing partners:
who we areThe International Cyber Security
The International Cyber Security
Summer School (ICSSS)
Knowledge in the field of cyber security
During ICSSS, young professionals, PhD-students and master's students get the opportunity to broaden their knowledge in the field of cyber security
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Student experience ICSSS 2025:
From 17 – 27 August 2025, the tenth edition of the International Cyber Security Summer School took place. ICSSS 2025 hosted a diverse multinational group of 52 bachelor-, master- and PhD-students, as well as young professionals. During a six-day programme the participants followed multidisciplinary lectures with a technical, legal, governance and social science view on cyber threats and opportunities. Throughout this week the students were given time to prepare and present solutions to challenges provided by prominent international and domestic security organisations. There was also time for collaborative activities such as a wargame on Operational Technology by Booz Allen Hamilton, and a crisis simulation organised by NCIA.
We asked two students how they experienced the Summer School:
“I had the opportunity to participate, along with other brilliant young professionals and students with different backgrounds, in truly stimulating and interesting workshops, lectures, and simulations on various topics: Operational Technology Security, Supply Chain and the NIS2 Directive.”
“I had the pleasure of meeting some incredible professionals and academics from diverse backgrounds, and I am deeply grateful to each one of them for their enthusiasm and resourcefulness during the whole week.”
An impression of ICSSS
“The ICSSS is a unique multidisciplinary week of learning and doing cyber security, offering the participants a memorable experience.”
Drs. Els de Busser
Asst. Professor Cyber Security Governance at the Leiden University Institute of Security and Social Affairs

