Articles tagged with Quantum Cryptography
Researchers demonstrate partial quantum cloning of linearly dependent states using a new approximate cloning method. This breakthrough allows for enhanced performance in quantum computing and improves the security of quantum cryptography.
Researchers prove the security of device-independent quantum cryptography using a new approach called entropy accumulation. This breakthrough paves the way for practical realization of such schemes with state-of-the-art quantum technology.
A cross-disciplinary team developed a satellite, Micius, to facilitate secure quantum key distribution globally. The system has achieved significant milestones, including decoy-state QKD with kHz rates over 1200 km distances, demonstrating the potential for an ultra-long-distance global quantum network.
Researchers at USC Viterbi School of Engineering developed a new, energy-efficient frequency comb that can be used to encrypt data and protect the security of cryptocurrencies. The comb requires 1000x less power than traditional combs, making it suitable for mobile applications.
A Sydney team has invented a microcircuit based on Nobel Prize research, miniaturizing a crucial component for quantum computing. This innovation could pave the way for large-scale integration of quantum circuits and manufacturing in massive quantities.
Penn State faculty members Ming Xiao, Heng Xu, and Jun Zhu receive NSF Convergence grants to support interdisciplinary research on permafrost coastal erosion, crowdsourcing research, and quantum science. The grants aim to bring together experts from various fields to address complex challenges and advance scientific discovery.
Scientists successfully demonstrated quantum communication between a satellite and a ground station, enabling the development of future satellite constellations. The technology uses lasers for high power efficiency and smaller terminals, facilitating the adoption of quantum key distribution for secure information transmission.
The journal has achieved a high impact factor of 9.111, demonstrating its influence on the scientific community. UNSW is proud to be a leader in the global sharing of knowledge in this rapidly evolving field.
Researchers at the University of Geneva have created a self-testing quantum random number generator that ensures reliability and unpredictability. This device allows users to verify generated numbers in real-time, making it difficult for hackers to exploit bias or imperfections.
Researchers at Tohoku University successfully generated unpolarized single photons from diamond with intrinsic randomness. This breakthrough is expected to revolutionize quantum information technology, including quantum computing and cryptography.
Researchers have demonstrated a prototype device that can send unbreakable secret keys from a handheld device to a terminal, enabling secure mobile transactions. The system uses ultra-fast LEDs and moveable mirrors to transmit keys at a rate of over 30 kilobytes per second.
Physicists at Lomonosov Moscow State University have created a new technique for generating entangled photon states, exhibiting correlated pairs that can be used in quantum cryptography. The technique uses spatial entanglement creation and has shown improved efficiency compared to previous methods.
Researchers from ITMO University have developed a novel approach to constructing quantum communication systems, enabling the transmission of single-photon quantum signals across distances of up to 250 kilometers. The system uses side frequencies to simplify device architecture and increase pass-through capacity, making it comparable to...
Researchers have developed a new method to overcome issues in implementing quantum cryptography, enabling 'unbreakable' encryption at rates of up to 1 megabit per second. This breakthrough promises faster and more secure data transmission, with potential applications in sensitive information sharing.
Recent study confirms wave-particle duality in quantum mechanics by recreating John Archibald Wheeler's 'great smoky dragon' thought experiment. The research demonstrates that the nature of light is not fixed until observed, with implications for quantum cryptography and computing.
Majorana zero modes are present and protected in a superconducting state, storing quantum information in a way that leaves the quantum state intact when either location is disturbed. This finding verifies previous experiments and goes further by showing that Majorana modes are protected as predicted theoretically.
Researchers have achieved a new milestone in quantum physics by entangling three particles of light in a high-dimensional quantum property. This breakthrough has the potential to revolutionize quantum encryption and secure communication, enabling multiple parties to share information with unconditional security.
Researchers from Linköping University discovered that energy-time entanglement is vulnerable to attack, allowing eavesdropping on traffic without detection. They propose countermeasures to solve the problem.
The AXA Research Fund has awarded a Chair to ICFO-The Institute of Photonic Sciences to focus on risks associated with data privacy and develop 100% secure data communications using quantum devices. The chair holder, Professor Antonio Acín, aims to obtain high-impact results for the future of society.
Researchers develop a new QPQ protocol using DPS-QKD, eliminating the process of oblivious key dilution and achieving zero failure probability. The protocol is also immune to photon-number-splitting attacks and can tolerate higher bit error rates.
Researchers have developed a new method for secure data transmission utilizing offline repositories and quantum information to overcome quantum computing threats. The approach provides robust authentication and authorship uniqueness, paving the way for potential applications in untraceable transactions.
Engineers at the University of Toronto have developed the first all-photonic quantum repeaters, enabling reliable and secure data transmission over long distances. The repeaters use highly entangled quantum states to reduce losses and function at room temperature.
Researchers at Perimeter Institute and IQC have discovered a new class of quantum advantages that allow for cause-effect correlation determination without intervention. This breakthrough has significance for both quantum information and quantum foundations, underpinning the promise of quantum technologies.
Scientists at the University of Rochester have developed a method for encoding 2.05 bits per photon using twisted light, doubling existing systems that use light polarization. This breakthrough could help increase the efficiency of quantum cryptography systems and secure communication.
Researchers from Leibniz University Hannover and PTB have successfully demonstrated the on-demand emission of electron pairs from a semiconductor quantum dot. The resulting electron pairs were found to be spatially separated with over 90% efficiency, a crucial step towards future applications such as quantum computing and cryptography.
Physicists successfully transmit a flash of light in a sensitive quantum state through the atmosphere, enabling secure quantum communication. The technology has potential advantages over current methods, including ability to transmit in sunlight and higher transmission rates.
Researchers at the University of Bristol have developed a scheme to enable quantum cryptography on mobile phones, using photons as information carriers. This breakthrough technology has the potential to make secure communication available to the general public.
Researchers Artur Ekert and Renato Renner propose a way to use quantum properties of particles of light to share secret keys for secure communication. They found that certain correlations can protect us against adversaries with superior technology, even if our choices are not completely predictable.
Researchers have demonstrated a form of quantum cryptography that protects people doing business with others they may not trust. The protocol, known as 1-2 random oblivious transfer (ROT), allows two parties to securely exchange information without revealing their picks, making it ideal for secure identification and online transactions.
Scientists demonstrated a breakthrough in quantum cryptography, enabling perfectly secure data transmission between two sites for up to fifteen milliseconds. This achievement marks the first step towards impregnable information networks controlled by Einstein's relativity and quantum theory.
Physicists at the University of Innsbruck have developed a new method to verify entanglement between several objects, using device-independent witnesses. This approach allows for high-confidence statements about entanglement with minimal assumptions.
The University of Toronto has awarded Michel Devoret and Robert Schoelkopf the John Stewart Bell Prize for their groundbreaking contributions to quantum mechanics. Their pioneering work in 'circuit quantum electrodynamics' has opened up new avenues for studying fundamental quantum physics.
Theorists have found new methods to determine the likelihood of quantum encryption scheme failure, enabling device-independent cryptography. This allows for the estimation of failure probabilities without relying on assumptions about the reliability of devices.
University of Michigan researchers create a new single-photon emitter that improves upon existing technology and is easier to make, paving the way for practical quantum cryptography. The device releases one photon at a time, allowing for secure communication by encoding messages in photons.
Scientists have transmitted a secure quantum code via satellite, promising secure global communication. The experiment uses quantum states of single light quanta, making data transmission virtually un-hackable.
Researchers are pursuing a quantum satellite concept to establish a secure global quantum communication network by harnessing the signal's travel time in empty space. The team has emphasized precise alignment between the satellite and ground stations to ensure accurate measurement of photons.
The Los Alamos National Laboratory team successfully demonstrated securing control data for electric grids using quantum cryptography. The system achieved latencies of at least two orders of magnitude smaller than requirements, making it suitable for real-time applications.
Physicists have demonstrated a new type of quantum entanglement using three particles, building on Einstein's original ideas. This experiment may lead to the creation of hybrid quantum systems with multiple unique properties.
A French team identified key parameters to generate high-fidelity single photons, crucial for quantum computing and communication. They simulated detector properties and experimental results to improve reliability.
Researchers have found a way to detect subtle changes in quantum data, making it harder for hackers to manipulate encoded communication. The new method, called Measurement Device Independent QKD, allows users to verify each other's data, ensuring unconditionally secure encryption.
Researchers have developed quantum cryptography protocols that can counter even a malicious manipulator controlling the setup, offering a measure of genuine randomness in keys. The breakthrough builds on recent twists that give quantum cryptography powerful boost against eavesdroppers.
Quantum computing is transforming computing, communications and other technologies with its groundbreaking capabilities. Researchers at the Institute for Quantum Computing are harnessing the forces of quantum mechanics to build incredible new technologies that will revolutionize information processing, storage, sharing and understanding.
Researchers in Singapore and Norway have created a 'perfect eavesdropper' that exploits an overlooked loophole in quantum key distribution (QKD) to obtain a shared secret key. This discovery highlights the importance of identifying imperfections in QKD implementation to ensure its security.
Researchers have made significant progress in creating efficient single-photon sources using fluorescent 'defect centers' in diamond. These structures can be used to implement provably secure quantum cryptography schemes and potentially build solid-state quantum computers. The team's innovations include the development of nanofabricati...
Researchers found a technique to remotely control a key component of most quantum cryptography systems, exploiting imperfections in photon detectors. Countermeasures have been implemented with ID Quantique, a leading manufacturer, to secure the technology.
Researchers from LMU and ETH Zurich have shown that position and momentum can be predicted more precisely than Heisenberg's Uncertainty Principle allows, using a quantum memory. This breakthrough enhances our understanding of quantum memories and provides a method for determining entanglement.
A field experiment on a robust hierarchical metropolitan quantum cryptography network was recently conducted in Wuhu, China. The network uses a combination of quantum key distribution and traditional networking techniques to achieve unconditional secure communication.
The network, built by 41 organizations, allows for secure transmission of data beyond classical methods using quantum cryptography. The researchers achieved a record-breaking transmission capacity of up to 8 nodes with links ranging from 20 to 83 kilometers.
Researchers at the University of Bristol have successfully implemented a high-fidelity fibre controlled-NOT gate using single photons in optical fibres. This achievement paves the way for more sophisticated quantum networks with increased range and potential applications in computing, communication, and advanced measurement.
Researchers have developed high-speed detectors capable of receiving more information at a higher key rate, making quantum cryptography more user-friendly. This breakthrough enables the transmission of theoretically secure communication over long distances.
Scientists at JILA have found a way to suppress the 'blinking' issue in quantum dots, increasing their photon emission rate four- to fivefold. By using an antioxidant chemical solution, they reduced the average time delay between excitation and photon emission from 21 nanoseconds to 4 nanoseconds.
The maximum transmission rate of quantum-encrypted messages is limited by detector dead times, which can compromise security. Researchers aim to reduce these times to increase speeds and enhance wireless cryptography.
Researchers at Northwestern University have successfully integrated quantum key distribution and quantum data encryption to create a complete quantum cryptographic data network. This new system offers extraordinary resilience to eavesdropping and is compatible with standard fiber optical networks.
A new study uses quantum decoy technique to encrypt data over fibre optic cable, increasing security. Photonic decoys change after eavesdropping, alerting receiving computer to potential tampering.
A new technique manipulates laser light to create decoy signals, distracting eavesdroppers and protecting secret messages. This development has immediate commercial applications, improving the security of fibre-optic communications.
Researchers at Perimeter Institute outline a new aspect of Quantum Cryptography, improving the security of data transmission. The study demonstrates enhanced capabilities in quantum key distribution, paving the way for widespread adoption in secure communication networks.
Physicists at NIST have demonstrated single photon detectors with an 88% efficiency, a significant improvement over previous designs. The detectors use a tungsten film chilled to near-absolute zero and are expected to enable reliable quantum communications systems.
The NIST quantum key distribution system generates a verifiably secret key at a rate of 1 million bits per second, about 100 times faster than previously reported systems. The system uses time-stamping and high-speed observations to identify photons from the sender among multiple photons from other sources.
The NIST-developed device detects single photons with negligible dark counts using a tungsten film coupled to fiber optic communication line. It achieves a detection rate of 20,000 photons per second with an efficiency of 20%, aiming for over 80% improvement.
Researchers have developed a high-speed encryption protocol using noisy light to secure information, promising unconditionally secure, fast, easy-to-manage, and cost-efficient security. The Northwestern method transmits encrypted data at 250 megabits per second, outpacing conventional cryptography and existing quantum methods.