A novel quantum key distribution encoder called MacZac combines Sagnac and Mach-Zehnder interferometers with a single phase modulator to achieve exceptionally low error rates and high stability in time-bin encoded quantum communications, while simplifying the optical setup and eliminating the need for active compensation.
The ARQ19 patent’s claim of achieving long-range quantum key distribution without trusted nodes is unfounded because it relies on an unexplained confidential classical channel between end users that cannot be quantum-based due to distance limitations, making the system’s security ultimately dependent on this non-quantum channel rather than achieving true quantum security.
A theoretical study advancing the composable security analysis of Gaussian quantum networks in finite-size regimes, introducing a novel parameter estimation methodology based on end-user data sharing, while demonstrating potential breakthroughs in surpassing the PLOB bound through quantum amplifier-assisted chains, though practical implementation remains challenging.
Quantum dot-based single-photon sources offer superior security for quantum cryptography through their unique combination of on-demand emission, high brightness, low multiphoton contribution, and tunable coherence in photon-number states, outperforming traditional Poisson-distributed sources across multiple cryptographic primitives.
Researchers have developed a QKD receiver chip featuring the full photonic circuitry needed for different time-based protocols, including single-photon detectors.
Sheffield University spin-out AegiQ has raised £1.4m (€1.5m) to build a semiconductor platform for quantum communications.
SIG, ID Quantique and ADVA announced today the implementation of the first quantum encrypted datacenter interconnection with QKD.
ITMO University researchers have developed a Quantum Key Distribution (QKD) system with coherent detection based on subcarrier wave quantum key distribution protocol.
An international team has developed a new method for generating quantum-entangled photons in a spectral range of light that was previously inaccessible.
Quantum Xchange announced the availability of Post-Quantum Cryptography (PQC) algorithms to its Phio Trusted Xchange key distribution system.
Researchers have developed a quantum communication chip that is 1,000 times smaller than current quantum setups, but offers the same superior security quantum technology is known for.
In September 2019, the European Commission (EC) announced the launch of OPENQKD, a €15 million worth project aimed to provide test quantum communication infrastructures in several European countries. Four Swiss Geneva-located firms, The University of […]
ABN AMRO and Qutech are working to develop a technology based on Quantum Key Distribution (QKD) to improve banking security.