The International Cyber Security Summer School (ICSSS) is an annual summer school, originally organised by NATO C&I Agency, Europol, Leiden University and Security Delta (HSD). The first edition took place in 2015, starting with 40 students. Given the success, further editions of the Summer School have been hosted, allowing up to 60 students to participate in the program.
The digital threat is undiminished and constantly changing. Interwoven processes in the digital ecosystem mean that everyone can experience the consequences of a cyber incident, even if they seem remote at first. The consequences of attacks, incidents and security breaches are increasing. There is a growing need for cyber security to be treated as a strategic priority on an individual, organisational and governmental level.
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.
This year's edition will take place from 16 - 21 August. Registration is now open!