This article provides an in‐depth assessment of lone actor terrorists’ attack planning and preparation.

In theory, states can gain security by acquiring internal arms or external allies. Yet the empirical literature offers mixed findings: some studies find arms and allies to be substitutes, while others find them to be complements. Political scientists Matthew Digiuseppe (Leiden University) and Paul Poast…

The extensive use of electronic communication channels and other devices has opened new possibilities for collecting data on human behavior. This information is sometimes openly accessible, but largely part of administrative registration systems that are not open to the broader public. The data provides…

On 1 March 2023, the Dutch Safety Board (Onderzoeksraad Voor De Veiligheid, OVV) published its report on the protection provided by the Dutch security services and lessons learned from three cases. The OVV was highly critical of the use of key witnesses and the protection offered to them. Jan Crijns,…

On the 15th of March, the radio program “The World of BNR Nieuwsradio” was live broadcasted from the Spanish Steps at the Faculty of Governance and Global Affairs in The Hague. Jaap de Hoop Scheffer, associated with the Institute of Security and Global Affairs, was one of the radio show’s guests. Following…

From nanoparticles to colliding ice planets and from biological origami to new x-ray scanner techniques: this year again, our scientists have made wonderful discoveries. From the largest numbers to the smallest molecules and from the oldest galaxies up to the latest algorithms, take a look at each institute's…

The guest rooms are located on the top floor of our institute.

Participation in a PRE-Class costs €75 per pupil. In addition, participants may be asked for an additional contribution for excursions, for example. If so, this will be stated in the programme booklet. Travel costs to and from Leiden are at your own expense.

From black holes to artificial intelligence and from drug research to data science: welcome to the fascinating world of the Faculty of Science. Our researchers, students and guests regularly give public lectures about their work. You are welcome to attend.

The CCLS Logo Competition is now closed. We have a winner!

Online data breaches are recurrent and damaging cyber incidents fors organizations worldwide. This study examines how organizations can effectively mitigate reputational damages in the aftermath of data breaches by hacking, through situational crisis communication strategies.

By chance, computer scientist Hans-Dieter Hiep (Leiden Institute of Advanced Computer Science and Centrum Wiskunde & Informatica) discovered a ‘gaping hole’ in a widely used method for evaluating software security. Hiep patched the hole, causing quite a stir in his field. 'It’s not pleasant when a PhD…

The Institute of Psychology is committed to play a prominent role in teaching and research at the national and international level.

Whilst 2020 has been an unusual and taxing year for colleagues at the Institute of Security and Global Affairs (ISGA), the Institute nevertheless can look back on an impressive range of successful grant applications during the previous year. This impressive result was achieved on top of excellent results…

Joachim Koops, Professor of Security Studies and Scientific Director of Leiden University’s Institute of Security and Global Affairs (ISGA) has been awarded a ‘Jean Monnet Chair’ with a focus on ‘The European Union’s Role in Security and Global Affairs’ (EURISGA).

This article illustrates how the term 'dual use' has become associated with a broader dichotomy between ‘legitimate’ and ‘illegitimate’ purposes.

In haar boek ‘Diensten met geheimen’ vertelt Willemijn Aerdts hoe de AIVD en MIVD te werk gaan. En ontkracht ze ook een paar mythes.

Study information, Webinar

Are traces of fire use detectable in ancient hominin genomes?

Leiden University and LUMC benefit from unique knowledge gained from research and teaching about healthy lifestyles. We want to bring this knowledge together into one place, and we want to share it even more effectively than we do now.

How do different communities of residents in The Hague perceive and manage food waste in relation to citizenship (rights and responsibilities)?

As a new vision on food production, the feasibility study on LED light to grow crops with the biological- and chemical evaluation of final products.

The Leiden Index of Depression Sensitivity (LEIDS) measures cognitive reactivity (CR) to sadness, an aspect of cognitive vulnerability to depression, conceptually similar to rumination.

From May to November 2017 the Van Vollenhoven Institute will carry out a research project, funded by NWO/WOTRO, on ‘Everyday justice and security provision for displaced and residents in Bukavu, DR Congo’.

The Hortus botanicus is located in the historical city centre of Leiden.

The subjects of the texts vary from Demosthenes to the delivery of camels in early Islamic Egypt, and their provenances stretch from the Eastern to the Western Desert, and from the Egyptian Nile valley to Qasr Ibrim in northern Nubia.

Participation in the Pre-University College Leiden involves a number of practical matters. For instance, a contribution to costs is requested and it is important that participants can be in Leiden on Monday afternoons.

Before the modern nation-state became a stable, widespread phenomenon throughout northern Europe, multilingualism-the use of multiple languages in one geographical area-was common throughout the region.

LIAS faculty teach and carry out thesis supervision in many programs.

Why does one person radicalize to involvement in terrorist violence within a group-based context, while another engages in this form of violence alone?

A story of Two Mosuls, The Resurrection of the Iraqi Armed Forces and the military defeat of ISIS. In this article, published in the Journal of Strategic Studies, the authors Maarten Broekhof, Martijn Kitzen and Frans Osinga discuss the military adaptation by the Iraqi armed forces and their role in…

Explosions at people’s homes, gangland killings and online threats: if you follow the news, it may seem as though threat levels in the Netherlands are rising. But is that really true? Researchers from Leiden University investigated this and have presented their results in the Dreigingsmonitor (Threat…

The Master’s programme Health, Ageing and Society trains its students to become academic Health, Ageing and Society professionals and engaged citizens who are competent and trained internationally and interdisciplinary. They are able to contribute to solutions for the challenges facing our ageing so…

Roughly arrested and subjected to extreme isolation. Using his experience, expert Jason Bhugwandass spoke to 50 young people who have spent time on Zikos wards (‘very intense, short-term observation and stabilisation wards’). He concluded that they’re ‘mostly locked up’ and leave ‘even more traumatised’…

The overall aim of the project is to investigate interests and their development over time in a daily life context, with particular attention for the transition from late secondary to post secondary education, and from late post secondary education to early career.

Research at the Leiden Institute of Physics (LION) is foundational and curiosity driven. All our scientists share a desire to increase the knowledge of the world around us, in an open atmosphere of inquiry from which innovative ideas emerge that provide applications and value for society.

Simona Demková, Assistant professor at the Europa Institute of Leiden University, publishes her book ‘Automated Decision-Making and Effective Remedies: The New Dynamics in the Protection of EU Fundamental Rights in the Area of Freedom, Security and Justice’.

In tracing the deeper historical roots of what Xi Jinping contemporarily frames as a “Chinese dream” of “wealth and power,” the article discerns key actors, events, and organizing principles in a long process toward restoring China’s deemed rightful place in the regional system.

On Thursday 6 May 2021, alumni of the Bachelor Security Studies (BaSS) and the Master Crisis and Security Management (CSM) were gathered in an online event arranged by the Institute of Security and Global Affairs and the study association L.S.A. Custodia.