cryptography tagged posts

Researchers Propose a Smaller, more Noise-Tolerant Quantum Circuit for Cryptography

algorithm
Credit: Pixabay/CC0 Public Domain

The most recent email you sent was likely encrypted using a tried-and-true method that relies on the idea that even the fastest computer would be unable to efficiently break a gigantic number into factors.

Quantum computers, on the other hand, promise to rapidly crack complex cryptographic systems that a classical computer might never be able to unravel. This promise is based on a quantum factoring algorithm proposed in 1994 by Peter Shor, who is now a professor at MIT.

But while researchers have taken great strides in the last 30 years, scientists have yet to build a quantum computer powerful enough to run Shor’s algorithm.

As some researchers work to build larger quantum computers, others have been trying to improve Shor’s algorithm so it co...

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Better Cybersecurity with New Material

Two persons in a lab with a laserinstrument infront of them on a table full of cables.

Quantum random number generation based on a perovskite LED. Digital information exchange can be safer, cheaper and more environmentally friendly with the help of a new type of random number generator for encryption developed at Linköping University, Sweden. The researchers behind the study believe that the new technology paves the way for a new type of quantum communication.

In an increasingly connected world, cybersecurity is becoming increasingly important to protect not just the individual, but also, for example, national infrastructure and banking systems. And there is an ongoing race between hackers and those trying to protect information. The most common way to protect information is through encryption...

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The Power of Chaos: A Robust and Low-Cost Cryptosystem for the Post-Quantum Era

Scientists develop a chaos-based stream cipher that can withstand attacks from large-scale quantum computers. Fast algorithms on quantum computers could easily break many widely used cryptosystems, necessitating more innovative solutions for digital security. In a recent study, a team of scientists designed a stream cipher consisting of three cryptographic primitives based on independent mathematical models of chaos. The resulting cryptographic approach is robust to attacks from large-scale quantum computers and can be implemented on low-cost computers, paving the way to secure digital communications in the post-quantum era.

While for most of us cryptographic systems are things that just run “under the hood,” they are an essential element in the world of digital communications...

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Ytterbium: The Quantum Memory of Tomorrow

The photo shows a rare-earth crystal that serves as quantum memory. The crystal is cooled to 3 degrees above absolute zero temperature. Credit: © UNIGE

The photo shows a rare-earth crystal that serves as quantum memory. The crystal is cooled to 3 degrees above absolute zero temperature.
Credit: © UNIGE

Quantum communication and cryptography are the future of high-security communication. But many challenges lie ahead before a worldwide quantum network can be set up, including propagating the quantum signal over long distances. One of the major challenges is to create memories with the capacity to store quantum information carried by light. Researchers at the University of Geneva (UNIGE), Switzerland, in partnership with CNRS, France, have discovered a new material in which an element, ytterbium, can store and protect the fragile quantum information even while operating at high frequencies...

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