Quantum key agreement (QKA) protocols enable two or more remote parties to establish a shared secret key by exploiting fundamental quantum properties. Unlike quantum key distribution, in which one ...

Quantum key distribution (QKD) enables two remote parties to establish information-theoretic secure keys by exchanging quantum states over optical channels. Foundational prepare-and-measure schemes, ...

Quantum networking is an underappreciated but potentially consequential dimension of U.S.-China quantum competition.

A growing number of quantum engineers worldwide have been trying to realize large-scale quantum networks, which consist of ...

MicroCloud Hologram Inc. has announced a groundbreaking proposal for a high-dimensional quantum key distribution (QKD) protocol that utilizes quantum Fourier transform and quantum-controlled NOT gate ...

Continuous-variable quantum cryptography has emerged as a significant branch of quantum cryptography, with continuous-variable quantum key distribution (CVQKD) at its core. However, compared to ...

A new method to distribute cryptographic keys using terahertz waves could help enable secure communication in the ...

To keep communications secure in a post-quantum world, cryptographers are digging down into the concept of cause and effect.

The German consortium QuINSiDa has achieved a major step toward mobile quantum-secure communication. They demonstrated a ...

A team of physicists has shown that quantum-encrypted keys can travel 75 miles through the same fiber-optic cable already ...

Russian scientists have developed a software and hardware complex for secure data transmission in 4G/5G mobile networks based ...

Quantum computers, systems that process and store information leveraging quantum mechanical phenomena, could eventually outperform classical computers on numerous tasks. Among other things, these ...