Migration to quantum-safe cryptography: about making decisions on when, what and how to migrate to a quantum-safe situation

Globally, great effort is being put into building a quantum computer. Quantum computers are anticipated to outperform conventional (super)computers in solving mathematical problems that lie at the foundation of commonly used cryptosystems. An efficient algorithm to solve the problem of the factorisation of large integers, for example, renders...

Will that smart contract really do what you expect it to do?

Smart contracts are believed to be the next step in inter-party automation; traditional trusted third parties are to be replaced by small pieces of code running on a distributed system that written by fallible humans. However, at the end of the day, these smart contracts controlling high-value assets are pieces of code written by fallible humans...

A framework for secure computations with two non-colluding servers and multiple clients, applied to recommendations

We provide a generic framework that, with the help of a preprocessing phase that is independent of the inputs of the users, allows an arbitrary number of users to securely outsource a computation to two non-colluding external servers. Our approach is shown to be provably secure in an adversarial model where one of the servers may arbitrarily...

The mid-infrared instrument for the James Webb Space telescope, VI: The medium resolution spectrometer

We describe the design and performance of the Medium Resolution Spectrometer (MRS) for the JWST-MIRI instrument. The MRS incorporates four coaxial spectral channels in a compact opto-mechanical layout that generates spectral images over fields of view up to 7.7 × 7.7″ in extent and at spectral resolving powers ranging from 1300 to 3700. Each...

Old School Hacking Treft Smartphones: Hoe operators hun netwerk kunnen beveiligen

Smartphones en tablets zijn vatbaar voor allerhande virussen en mal-ware infecties. Meestal is het de taak van de gebruiker om zich daaryegen te beschermen. Hij moet pincodes instellen, firewalls opzetten en virussscanners installeren, Cybercriminaliteit is echter niet een probleem van de eindgebruiker alleen. Ook de operators hebber er een...

ANICE: Atmospheric Inputs of nitrogen compounds into the North Sea: First results: a contribution to subproject CAPMAN

Terrestrial inputs of nitrogen are often dominated by riverine transport, especially in the winter (Sanders et al., 1997). However, the atmospheric contribution to the total land based nitrogen input has been reported to be on the order of 30 % for the total North Sea area (North Sea Task Force, 1993). The atmospheric nitrogen load is directly...

Atmospheric inputs of nitrogen compounds into the North Sea: Initial results from the ANICE project

Atmospheric Nitrogen Inputs into the Coastal Ecosystem (ANICE): Preliminary Results

The relation between the oxidative biotransformation of hexachlorobenzene and its porphyrinogenic activity

The relation between the major toxic effect of hexachlorobenzene, hepatic porphyria, and its oxidative biotransformation was studied in vivo, by observing the effect of modulating its biotransformation on the expression of porphyria. This modulation was achieved by selective in vivo inhibition of the major cytochrome P450 isoenzyme involved in...

The microsomal metabolism of hexachlorobenzene: Origin of the covalent binding to protein