Communication security has to evolve to a higher plane in the face of the threat from the
massive computing power of the emerging quantum computers. Quantum secure direct …

Low Earth Orbit (LEO) satellites undergo a period of rapid development driven by ever-
increasing user demands, reduced costs, and technological progress. Since there is a lack …

Quantum secure direct communication (QSDC) attracts much attention for it can transmit
secret messages directly without sharing a key. In this article, we propose a one-step QSDC …

Quantum secure direct communication (QSDC) can directly transmit secrete messages
through a quantum channel. Device-independent (DI) QSDC can guarantee the …

Rapid progress has been made in quantum secure direct communication in recent years.
For practical application, it is important to improve the performances, such as the secure …

Quantum secure direct communication (QSDC) based on entanglement can directly transmit
confidential information. However, the inability to simultaneously distinguish the four sets of …

Device-independent quantum secure direct communication (DI-QSDC) can relax the
security assumptions about the devices' internal working, and effectively enhance QSDC's …

Since its discovery, the quantum entanglement becomes a promising resource in quantum
communication and computation. However, the entanglement is fragile due to the presence …

Rapid development of supercomputers and the prospect of quantum computers are posing
increasingly serious threats to the security of communication. Using the principles of …

The quantum private query (QPQ) is a quantum solution for the symmetrically private
information retrieval problem. We study the security of quantum-key-distribution-based QPQ …