50 search results for “cryptography” in the Public website
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Faster number theory, safer cryptography
Developing a method to simplify polynomials in complex curves
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Postdoc in quantum algorithms and/or post-quantum cryptography
Science, Mathematical Institute (MI)
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Cryptography from quantum uncertainty in the presence of quantum side information
Promotor: Ronald Cramer, Co-promotor: Serge Fehr
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Unconditionally secure cryptographic protocols from coding-theoretic primitives
This dissertation presents new cryptographic protocols, which can be divided into two families.
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Secure Multiparty Computation and Secret Sharing
The first book ever on information-theoretically secure multiparty computation
- Visualizing Cryptographic Networks of Spies, Diplomats and Scientists, 1603-1701
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Nele Mentens joins LIACS as Professor of Applied Cryptography & Data Security
Finding solutions for economically and socially relevant problems in digital data security. That is what Nele Mentens, Professor of Applied Cryptography & Data Security at the Leiden Institute of Advanced Computer Science (LIACS), wants to achieve. On 1 June she was appointed to contribute to the institute…
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Ronald Cramer appointed ‘Fellow of IACR’
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.
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Prof. dr. Ronald Cramer appointed member of the Royal Dutch Academy of Sciences (KNAW)
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…
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Book publication Ronald Cramer: a world premiere
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.
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Algebra, Geometry and Number Theory
The research of the Algebra, Geometry and Number Theory programme ranges from fundamental mathematical theory to algorithms and applications.
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How suspicious parties can work together safely
Cryptographer Max Fillinger developed new methods to analyse a group of algorithms called commitments schemes. These schemes are building blocks for cryptographic protocols, which enable multiple parties that do not trust each other to work together safely. His PhD Defence is on 19 March.
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Nadine Akkerman
Faculty of Humanities
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Attacks on hash functions and applications
Promotores: R. Cramer, A.K. Lenstra, Co-Promotor: B.M.M. de Weger
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Two-Prover Bit-Commitments: Classical, Quantum and Non-Signaling
This thesis considers multi-prover commitment schemes whose security is based on restrictions on the communication between the provers.
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On Products of Linear Error Correcting Codes
In this thesis we study products of linear error correcting codes.
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Serge Fehr appointed as Professor Quantum information theory
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…
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Invisible but ever-present: female spies in the 17th century
For a long time it was thought that there were few or no female spies in history. However, nothing could be further from the truth. In her book Invisible Agents, Nadine Akkerman reconstructs the stories of the many British women spies in the 17th century.
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Cryptanalysis research of prof. Ronald Cramer in WIRED
The American magazine WIRED recently published an article on ‘quantum-safe public key encryption’.
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Algebraic techniques for low communication secure protocols
Promotor: R. Cramer
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Complex multiplication of abelian surfaces
Promotor: Peter Stevenhagen
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Nusa Zidaric
Science
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Algorithms for finite rings
Promotores: H.W. Lenstra, K. Belabas (University of Bordeaux)
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Léo Ducas appointed professor of Mathematical Cryptology
In cryptography, the sky is the limit according to the new professor Mathematical Cryptology Léo Ducas. He already designed several cryptosystems as part of his research at the Centrum Wiskunde & Informatica (CWI), some of which might soon be adopted as new international standards. Since December,…
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Mathematical Institute
Mathematics forms the basis of many innovations in technology, the service industry and science, such as data analysis and coding, artificial intelligence, weather or climate change modelling or understanding molecular processes. The researchers from the Mathematical Institute (MI) are constantly developing…
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Major European subsidy for Nadine Akkerman and detective work into old, handwritten documents
Nadine Akkerman has received a subsidy of two million euros from the European Research Council (ERC) for research into 16th and 17th century English manuscripts. Akkerman: ‘Working with handwritten texts and unravelling their mysteries is one of my passions, and it’s especially rewarding when this work…
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Systems and Security
Researchers at LIACS are working to devise the computers of tomorrow that will be the backbone of the Cloud and Edge computing paradigms as well as the Internet of Things. In this respect, we are involved in research and development of high performance computing systems, embedded & real-time computing…
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Prof. dr. Ronald Cramer interviewed about data security by Volkskrant
Saturday 13 February 2016 the daily newspaper Volkskrant published an article based on interviews with Professor Ronald Cramer and Harry Buhrman.
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Light manipulated with large artificial atom
Physicists have manipulated light with large artificial atoms, so-called quantum dots. Before, this has only been done so well with actual atoms. It is an important step towards light-based quantum technology. Publication on August 30th in Nature Communications.
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Programme structure
The programme consists of four phases: conceptualisation, specialisation, electives and thesis.
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Algorithms for quantum software
Top scientists of three Dutch universities are working on software and systems for quantum computers. Researchers of the Leiden Institute of Advanced Computer Science (LIACS) and the Leiden Institute of Physics (LION) are developing new algorithms to make those super computers work. The coming years,…
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Martin Bright
‘Wild’ might not be the first word that springs to mind when you think about mathematics. But there is, most definitely, a wild side to this research area, consisting of problems that are extremely elusive and difficult to ‘tame’. Martin Bright works on one of these problems. His aim is to tame the…
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Thinking about the quantum internet
Quantum computers deserve their own quantum internet. This is a network that dispatches information not in the form of bits - ones and zeros - but rather as qubits, just like in the quantum computer itself. In the view of Dirk Bouwmeester, a professor in Leiden’s Quantum Matter & Optics research group,…
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ERC Advanced Grant for cryptographer Ronald Cramer
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.
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NWO tenure track grant in arithmetic algebraic geometry
Within the context of the four national mathematics clusters, NWO has awarded seven proposals for tenure track positions. One of these was on 'Moduli, metrics, models, and arithmetic of Shimura varieties' by Bas Edixhoven from the Leiden Mathematical Institute.
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Three ERC Advanced Grants for Leiden researchers
Archaeologist Frans Theuws, Buddhism specialist Jonathan Silk and mathematician Ronald Cramer have each been awarded an ERC Advanced Grant of 2.5 million euros.
- Week 4: 28 January – 3 February 2018
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Physicists demonstrate new method to make single photons
Scientists need individual photons for quantum cryptography and quantum computers. Leiden physicists have now experimentally demonstrated a new production method. Publication in Physical Review Letters on July 23rd.
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This Week’s Discoveries | 6 November 2018
Lecture
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Random walks: wandering the streets like a group of drunk students
Mathematician Oliver Nagy still vividly remembers the first time he learned about a random walk. ‘The lecturer told us to imagine a company of drunken students who wander in the streets. At each intersection, they would spin one of them around and all would go in the direction where he or she came to…
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The million dollar proof
PhD student Raymond van Bommel decided to pore upon one of the most complicated mathematical problems of our time; the solution of it is worth 1 million dollars! Van Bommel did not get that far yet. However, he wrote his own computer program to make new calculations. ‘It could just be that someone else…
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Mathematician Peter Koymans wins KWG PhD prize
Leiden PhD student Peter Koymans has been declared ‘best mathematics PhD student’ by the Royal Dutch Mathematical Society (KWG). He received the prize at the Dutch Mathematical Congress (NMC) on 24 and 25 April. With his talk about his research into the Cohen-Lenstra conjecture, Koymans left eleven…
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Gravitation grants for three major research programmes
Three major research projects involving Leiden scientists have been awarded a grant from NWO’s Gravitation Programme. The projects are on innovation processes, organs-on-chips and quantum software.
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Developing quantum software with a grant of 18.8 million euros
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.
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The Netherlands as an international centre for quantum technology
State secretary Mona Keijzer received the National Agenda on Quantum Technology from Robbert Dijkgraaf on 16 September. With this agenda, Dutch knowledge institutes and high-tech companies identify what is needed to maintain and strengthen the Dutch pioneering role in this area. Researchers from Leiden…
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Awards and prizes 2020
An overview of awards and prizes granted to our staff and students in 2020, as well as special appointments at Leiden University and other institutions.
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6th Quantum Software Consortium General Assembly
Conference
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This Week’s Discoveries | 20 March 2018
Lecture
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This Week's Discoveries | 4 April 2017
Lecture
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Staff
The Cyber Security lecturers are scholars and lecturers of Leiden University, Delft University of Technology and The Hague University of Applied Sciences.