Chromo-encryption method uses color to encode information

In a new approach to security that unites technology and art, EPFL researchers have combined silver nanostructures with polarized light to yield a range of brilliant colors, which can be used to encode messages.

Distortion-free structured light

An exciting prospect in modern optics is to exploit patterns of light—how the light looks in its many degrees of freedom—often referred to as "structured light." Each distinct pattern could form an encoding alphabet for ...

High-performance visible-light lasers that fit on a fingertip

As technologies keep advancing at exponential rates and demand for new devices rises accordingly, miniaturizing systems into chips has become increasingly important. Microelectronics has changed the way we manipulate electricity, ...

Climate change's effects can be more than the sum of its parts

The number of simultaneously acting global change factors has a negative impact on the diversity of plant communities—regardless of the nature of the factors. This is one of the findings of a recent study by ecologists ...

Quantum cryptography: Making hacking futile

The Internet is teeming with highly sensitive information. Sophisticated encryption techniques generally ensure that such content cannot be intercepted and read. But in the future high-performance quantum computers could ...

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