Cryptography without using secret keys

Most security applications, for instance, access to buildings or digital signatures, use cryptographic keys that must at all costs be kept secret. That also is the weak link: Who will guarantee that the key doesn't get stolen ...

Quickly designing a white LED

The advent of the white light emitting diode (LED), which consists of a blue LED with a phosphor layer, greatly reduces the energy consumption for lighting. Despite the fast-growing market, white LEDs are still being designed ...

'Just clicking' a molecule to a biomolecule for another function

Researchers have reported a material that controls the behavior of cells in a dynamic way, just as happens in biology. A new technique uses functional components that can be 'clicked' to a material using vitamin H. Researchers ...

Forests emit carbon dioxide during heatwaves

Forests absorb a lot of CO2 from the air in the summer, but during the heat wave at the end of July, forests in the Netherlands emitted CO2. This is shown by measurements taken by the University of Twente.

Satellite images of forest fires are reliable

Recently, there was a strong appeal in the newspapers from the Brazilian president Jair Bolsonaro that satellite images on the bush fires were not correct, i.e. that they were providing unreliable information. This is a rather ...

Skating droplets move in orbits

They look like planets: Two droplets move in orbits on an ice cold fluid surface. They attract each other, and by almost frictionless movement on their own vapour, they skate around each other. It is a fascinating mechanism ...

Boosting light-based computing

University of Twente spinoff company QuiX is currently developing a photonic chip using the quantum properties of light for carrying out complex calculations. The new chip, of which a first version is already operational, ...

Getting a smart tattoo without a needle

A tattoo that is warning you for too many hours of sunlight exposure, or is alerting you for taking your medication? Next to their cosmetic role, tattoos could get new functionality using intelligent ink. That would require ...

Holographic 3-D coach to help healthy living

A 3-D hologram projection of a coach, to support physical and mental wellbeing: over the last few months, DesignLab has been working on the design and hardware for a prototype HoloProjector for virtual coaches, together with ...

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