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quantum cryptography News
Optical Power Limiter Pushes Attack-Proof Quantum Communication Forward
SINGAPORE, July 19, 2021 — Researchers from the National University of Singapore (NUS) developed two methods to enable quantum key distribution (QKD) communications to avoid side-channel attacks — instances in which attackers exploit weaknesses in the setup of the information system to eavesdrop on the exchange of secret keys. QKD is a method for secure communication that uses quantum mechanics to encrypt information. While the security of QKD is unbreakable in principle, if it is incorrectly implemented,
Researchers Determine Quantum Light Source in 2D Material
VIENNA, Oct. 23, 2019 — Scientists at the Vienna University of Technology (TU Wien) have uncovered the source of a special type of quantum light created at certain points in the 2D material tungsten diselenide (WSe2) when it is supplied with energy. They found that this...
Scalable Quantum Light Source Enables Quantum Cryptography, Computing
HOBOKEN, N.J., Oct. 31, 2018 — Researchers at Stevens Institute of Technology and Columbia University have developed a scalable, precise method for creating large numbers of quantum light sources on a chip. These light sources could be used for quantum computers and cryptographic...
Semi Material Used for Secure Quantum Communications
MOSCOW, March 26, 2018 — Use of single photons as carriers for quantum bits could enable reliable security during quantum data transmission. Researchers have found that an existing material could be used to build a system for the reliable generation of single photons under...
Ottawa Displays High-Dimensional Quantum Encryption
OTTAWA, Ontario, Aug. 25, 2017 — A quantum-secured message containing more than one bit of information per photon has been sent through the air above the city of Ottawa. According to scientists, this is the first time high-dimensional quantum encryption has been demonstrated with...
Optical Signals Measured From Space Could Enable Quantum Encryption Network
ERLANGEN, Germany, July 5, 2017 — Quantum-limited coherent measurements of optical signals were sent from a satellite in Earth’s orbit to an optical ground station over a distance of 38,600 kilometers (almost 24,000 miles). Excess noise was bound. The precise Earth-based...
Entangled Photons Could Advance Quantum Cryptography
VIENNA, March 29, 2016 — Three photons have been experimentally entangled in a high-dimensional quantum property related to the “twist” of their wavefront structure, a milestone achievement for quantum physics. Entanglement is a counterintuitive property of...
LANL Licenses Polarization Cryptography Technique
LOS ALAMOS, N.M., Oct. 1, 2014 — Quantum encryption technology based on random photon polarization could give ordinary people access to truly secure commerce, banking, communications and data transfer. Developed at Los Alamos National Laboratory, the technology has been licensed to...
Squeezed Light Transmitted Through Air
ERLANGEN, Germany, Sept. 16, 2014 — German scientists have overcome a theoretical hurdle by transmitting a pulse of squeezed light over a long distance through the air.
Scaling Down Quantum Cryptography for Mobile Phones
BRISTOL, England, April 4, 2014 — A tiny microchip has huge potential for the future of secure quantum communications.
Global Quantum Network Based on Optical Fibers
VIENNA, June 13, 2013 — A technique for increasing the time that quantum information is stored in glass fiber-coupled atoms could yield a global optical fiber-based quantum communication network, researchers in Austria have found.
Quantum Code Sent from Aircraft to Ground Station
MUNICH, April 3, 2013 — The first secure quantum code transmitted using quantum cryptography from a plane in flight to a ground station has provided an important step toward creating a secure laser-based global communications network.
Nanoantenna Made of DNA Captures, Emits Light
PARIS, Aug. 1, 2012 — A bio-inspired light nanoantenna has been created using two gold nanoparticles, short DNA strands and a tiny fluorescent molecule that can capture and emit light. The discovery paves the way toward the development of highly efficient LEDs and...
OKI Develops Light Source
Jun 1, 2012 — Telecommunications company OKI Electric Industry of Tokyo has announced its development of a quantum entangled light source that offers the highest purity level achieved to date. The source is based on cascaded nonlinear optical effects using a...
OKI Develops Entangled Light Source
TOKYO, Feb. 21, 2012 — The telecommunications company developed the world’s purest quantum entangled light source.
Quantum Physics Enables Secure Cloud Computing
VIENNA, Feb. 2, 2012 — By combining quantum computing with quantum cryptography, a perfectly secure cloud computing environment was achieved, addressing one of the many challenges facing the current trend of storing information remotely.
Photonic Crystal Controlled by ‘Nanoquake’
MUNICH and SANTA BARBARA, Calif., Oct. 25, 2011 — Until now, the idea of an acoustically modulated photonic crystal merely existed in theory, but a new technique is proving that sound waves can control photonic crystals within a nanocavity. Scientists working for the cluster of excellence...
Eavesdropper demonstrates loophole in secure communications
SINGAPORE – Quantum key distribution (QKD) is designed for secure computer-based interactions, keeping communication between two remote parties confidential by enabling them to construct a shared secret key during the course of their conversation. It may sound...
First Micropillars Milled in Warsaw
WARSAW, Poland, June 20, 2011 — Rare milling equipment that produces nanosize semiconductor structures, or micropillars, is now at the disposal of scientists and students at the University of Warsaw. These micropillars can be used as efficient light sources and will open up...
Two-Slit Interferometer Experiment Gets Makeover
TORONTO, June 9, 2011 — By applying a modern measurement technique to the historic two-slit interferometer experiment, scientists soon may be able to measure reality without distorting it. Quantum mechanics tells us that a tree falling in a forest with no one there...
Efficient Single-Photon Sources Move Closer
BRISTOL, England, March 29, 2011 — Fluorescent diamond “defect centers” are being used to create efficient single-photon sources that are expected to enable secure optical communications, also known as quantum cryptography. Defect centers in diamond materials, which...
Superconductors Strengthen Single-Photon Detectors
Mar 1, 2011 — Single-photon detectors (SPDs) underpin a host of new areas in optical physics, one of which is quantum cryptography – or, more correctly, quantum key distribution (QKD) – an application that is already on the fringes of commercial...
Single photons retain character as wavelength changes
GAITHERSBURG, Md. – The wavelength of a single photon can be changed significantly without destroying its fundamental quantum character, researchers have reported. This finding has application in the developing field of quantum information science, which includes...
Hackers Test Quantum Cryptography Security
TRONDHEIM, Norway, Sept. 15, 2010 — A new technique that exploits imperfections in quantum cryptography systems has been developed and tested by the Norwegian University of Science and Technology (NTNU), the University of Erlangen-Nürnberg and the Max Planck Institute for the...
Swiss Research Institutions Rated Among Best in World
Aug 1, 2010 — Some of its best-known exports may include watches, chocolate and cheese, but Switzerland also is home to a healthy photonics industry, which, according to an October 2009 report by Swiss-based consulting firm Optech Consulting, has generated a...
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May 2024
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