This project explores the ongoing acceleration of overlapping systemic crises and security threats and their interactions with local, national, and regional processes in a closely interconnected world.

One of the core concepts of the Master programme Crisis & Security Management (CSM) is ‘governance’. In the course Security Networks and Technology, the focus is on the interplay between various levels of security governance and new technological developments.

To make digital communication more secure, we need to tighten up the legal frameworks and identify the biggest cyber threats.

On 6 May 2022, Alies Jansen presented her work on 'Security Force Assistance in Iraq' to the Conflict, Peace and Security thematic area during a research feedback seminar.

The Women, Peace and Security (WPS) agenda arising from United Nations Security Council Resolution 1325 has reached a critical juncture in its short 20-year history. Despite comprising ten resolutions designed to bolster the agenda and expand its scope and normative power, serious challenges to the…

On Friday 4 March 2022, Matthew Hoye presented his work on 'OFAC’s War in Afghanistan: Two Theories on Famine and Sanctions' to the Conflict, Peace and Security thematic area during a research feedback seminar.

This paper examines cyber intelligence in the context of national and international security.

The Leiden Institute of Advance Computer Science (LIACS) in collaboration with the Institute of Security and Global Affairs (ISGA) have developed the minor Cyber Security to provide students with a mixture of technical and governance knowledge to set them on a path towards understanding cyberspace and…

This article examines Russia’s use of low-level agents in covert operations across Europe since 2022, analysing a dataset of 145 cases to identify patterns in recruitment, demographics and network structure using social network analysis.

This dissertation consists of two parts, with the common theme

The European Horizons Youth Security Conference successfully took place on May 9th, 2026. More than 85 students gathered in Leiden to participate in a day filled with panels, workshops, and discussions on international security. The event was organized by students on behalf of European Horizons Leiden…

The Leiden University Sustainability Network is the platform for Leiden University staff and students to combine their efforts and support each other in making our university more sustainable.

How can we promote social cohesion in a society that is culturally and religiously diverse?

How do technologies of computer vision, which promise to replace humans in the understanding of images, work in practice in the field of security, and what are their ethical and political implications?

Taking the changing landscape of international cyber security and cyber conflict as a point of departure, The Hague Program on International Cyber Security focuses on the various modes of governance that states and other actors can bring into play to deal with and shape the strategic changes and challenges…

Sarah Giest, Assistant Professor at Leiden University, and Ishani Mukherjee researched the topic of 'Behavioural Insights Teams (BITs) and Policy Change: An Exploration of Impact, Location, and Temporality of Policy Advice'.

The LGBT+ Network offers a platform for all lesbian, gay, bisexual, transgender and queer staff and students at Leiden University.

The protection of civilians (POC) in armed conflict has become a core strategic objective for the United Nations system and for UN peace operations in particular. The UN, however, is not the sole actor engaged in POC.

In this thesis, we extend the concept of null models as canonical ensembles of multi-graphs with given constraints and present new metrics able to characterize real-world layered systems based on their correlation patterns.

In this top-rated course, you will learn how the European Union prepares and decides on policy, and how policy is transferred to member states and implemented by various authorities. It discusses the challenges of the European multi-level governance structure and the main causes of policy failure or…

This paper aims to understand the most common underlying problems causing strategic surprise in the context of the European Union.

Below you can find an overview of our network.

How and under what conditions Dutch primary school principals' managerial networking activities affect the performance of their school

An international comparative study of the Netherlands, Belgium, Denmark, France, Germany, the United Kingdom and the United States.

The archaeology of transregional exchange (1st millennia BCE-CE)

The focus of this programme is the inter-community social relationships and transformations of island networks in the Lesser Antilles across the historical divide.

Intelligence and National Security is the new specialisation in MSc Crisis and Security Management (CSM). It will start next September 2021. Do you want to know more about this track?

On 9 April 2019 the graduation ceremony of the master Crisis and Security Management (MSc) took place. Three graduates were asked how they felt now, what they are going to miss, whether they would have wanted to do something different looking back and what their future plans are.

Promotor: R. Tijdeman, Co-promotor: H.J.J. te Riele

Do recent developments in the European security architecture signal the end of multilateral cooperation, or the beginning of a new era with emerging forms of international security collaboration?

Are you curious about how economics, law and governance shape our society? At Leiden University, you’ll explore financial systems, public administration, international relations and legal frameworks. From international law to public policy, from global diplomacy to financial regulation: you’ll learn…

Are you curious about how economics, law and governance shape our society? At Leiden University, you’ll explore financial systems, public administration, international relations and legal frameworks. From international law to public policy, from global diplomacy to financial regulation: you’ll learn…

Many of the big challenges of the 21st century (climate change, international migration, financial instability, socio-economic inequality) find their origins in the organisation of the global economy. Any solution to the world’s big challenges therefore requires forceful policy interventions at the…

This thesis seeks to combine two different research topics; Multi-Objective Optimization and Complex Network Analysis.

Both within Leiden University and in the external partner universities PhD research is conducted which is directly or indirectly related to regional integration.

How do humanitarian organisations adapt cyber incidents to their specific priorities and needs, and how can they adapt strategies of other organisations?

The Network Science group works on methods and algorithms for analyzing real-world (social) network data.

On 12 March 2019, KPN published the sixth edition of the European Cyber Security Perspectives. Sergei Boeke, researcher at the Institute of Security and Global Affairs, has written an article about Cyber ​​Warfare.

The Young Alumni Network is specifically for young alumni (35 years and younger) living in the Netherlands, who have recently graduated and are at the start of their career. As a young alumnus you have different needs than when you are settled in your career path or when your career is drawing to a…

The executive master’s programme in Cyber Security of Leiden University takes a multidisciplinary approach that helps you develop effective and sustainable solutions for cyber risks and threats.

The active learning network joins together everyone interested in the subject to move the theme further within Leiden University. The SALTSWAT pilot program researches the ways forward for Leiden University.