Ronald Cramer, in cooperation with Ivan Damgard and Jesper Nielsen (Aarhus University) have recently published the first book ever written on “quantum-secure multi-party computation”. The authors have spent six years to finish this comprising book.

Ronald Cramer (CWI/Leiden) has been awarded a VICI-grant by the Netherlands Organisation of Scientific Research (NWO) for his research on the mathematical fundaments of secure computation.

Promotor: M.T.M. Koper, Co-promotor: J.B.F. Juurlink

On 30 September 2013 Ronald Cramer, head of the Cryptology group of Centrum Wiskunde & Informatica (CWI) and a professor of cryptology at the Mathematical Institute of Leiden University, was inaugurated as a member of the Royal Netherlands Academy of Arts and Sciences (KNAW).

Ronald Cramer has been awarded an ERC Advanced Grant for his proposal 'Algebraic Methods for Stronger Crypto'. He will receive 2.5 million euro for research in the upcoming five years.

Prof. dr. Cramer (Leiden University / Centre for Mathematics & Computer Science) is appointed as ‘Fellow of IACR’. This was announced by the International Association for Cryptologic Research on 8 April 2013.

Saturday 13 February 2016 the daily newspaper Volkskrant published an article based on interviews with Professor Ronald Cramer and Harry Buhrman.

The American magazine WIRED recently published an article on ‘quantum-safe public key encryption’.

Curved single crystals provide variable, but well-defined surface structures.

The directorate of the Netherlands Research School for Astronomy (NOVA) has two new members. Ronald Stark (currently at NWO) will be the new Executive Director of NOVA from 1 September. Amina Helmi (Professor of Dynamics, structure and formation of the Milky Way at the University of Groningen) will…

Ronald Cramer, Professor at the Mathematical Institute of Leiden University and researcher and head of the research group Cryptology at ‘Centrum Wiskunde & Informatica (CWI), the national research center for mathematics and computers science in the Netherlands, is appointed as a member of the Royal…

Metals surfaces form a group of effective catalysts for the reaction of small molecules such as hydrogen (H2).

The research presented in this thesis makes use of small molecules (as H2 , D2 and O2 ) on well-defined single crystal surfaces (flat Pt(111), flat Cu(211) and curved Pt(111)) to elucidate the role of surface structure and degrees of freedom in the reactant in specific surface reactions.

The first book ever on information-theoretically secure multiparty computation

Five talks will be given during the Leiden Science Family Day: two children's lectures and three lectures for adults. Will you be there ?

Large areas of space are filled by molecular clouds that consist of gas and dust grains that are the remnants of dead stars. When these clouds start collapsing, the decreasing temperature and increasing density cause gas particles to start accreting onto dust grain surfaces.

Proceedings of the Eighteenth Annual Theoretical Roman Archaeology Conference Amsterdam 2008

van Luijk

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Aristocratic dynasties have long been regarded as fundamental to the development of early modern society and government. Yet recent work by political historians has increasingly questioned the dominant role of ruling families in state formation, underlining instead the continued importance and independence…

Promotor: Ronald Cramer, Co-promotor: Serge Fehr

Promotores: P. Stevenhagen, L. van Geemen (Università degli studi di Milano), Co-Supervisor: Ronald M. van Luijk

In the South African context, certain iconic images have been a dominant source for public understandings of historical events. The emphasis given these images tends to overshadow the historical value of other more personal photographic sources – like studio or amateur photography. This project looks…

Commonplace - Photographs from the Drummond-Fyvie Collection and the Ngilima Collection. By Tamsyn Adams and Sophie Feyder.

The group of Dr. Roxanne Kieltyka designs and synthesizes molecules that self-assemble into polymeric materials using specific non-covalent interactions. These substrates can be used for numerous applications in medicine ranging from disease detection to cell delivery depending on the (bio)molecular…

Onder leiding van Artificial Intelligence-experts Marlies van Eck en Ronald van den Hoogen is het multidisciplinaire opleidingsprogramma samengesteld. Dit is de eerste editie van postacademische leergang van het Leidse PAO-bureau en extra bijzonder is dat de leergang volledig online plaatsvindt.

Marc Stevens, PhD student of Ronald Cramer, and colleagues have found a weak spot in internet security. As a consequence of this weak spot in the infrastructure of digital certificates forged certificates can be issued that can be fully trusted by the usual web browsers. The results have been presented…

The first larger quantum computers will soon be available. These computers need new software. Researchers at Leiden University have been awarded a Gravitation grant to develop the necessary software. They will be collaborating with colleagues from other research institutions.

A History of Dutch Corruption and Morality showcases 300 years of change, continuity, and diversity in the history of Dutch political corruption and public morality. It analyses a series of corruption scandals and shows how the following debates were connected to the big changes of that time: from the…

An overview of awards and prizes granted to our staff and students in 2017, as well as special appointments and royal distinctions.

During his visit to the Caribbean part of the Kingdom, Minister Ronald Plasterk (Home Affairs) on Thursday, January 24, 2013 performed the official opening of a small exhibition. The exhibition portrays the work Prof. Dr. Corinne Hofman and Dr. Menno Hoogland have conducted on Saba over the past 26…

As of 1 June, Serge Fehr has been appointed as Professor Quantum information theory at the Leiden Mathematical Institute (MI). Fehr is employed by Centrum Wiskunde & Informatica (CWI) and as of his appointment works one day a week at the MI. Fehr’s research is focused on quantum cryptology and will…

‘The Hague is rapidly developing to become a knowledge city and Leiden University is making an important contribution to this development.' These were the words with which alderman Joris Wijsmuller opened The Hague Day of Architecture on Saturday 20 May 2017. Wijnhaven was the focal point of the day…

Archaeologist Frans Theuws, Buddhism specialist Jonathan Silk and mathematician Ronald Cramer have each been awarded an ERC Advanced Grant of 2.5 million euros.

In May 2023, COI researchers collaborated to publish a special issue on the Legitimacy of Institutions for Conflict Resolution with the Utrecht Law Review.