Due to the recent rapid growth of computing technologies, today's encrypted information
based on classical computational complexities will soon no longer remain secure. Quantum …

The use of free-space optical (FSO) systems as secure transmission media has recently
attracted research efforts worldwide. However, their secrecy performance may be …

This paper proposes a novel design and analyzes security performance of quantum key
distribution (QKD) protocol over free-space optics (FSO). Unlike conventional QKD protocols …

This paper proposes a high-altitude platform (HAP)-aided relaying satellite free-space optics
(FSO) quantumkey distribution (QKD) system for the secure vehicular networks supporting …

As the evolution of wireless communication progresses towards 6G networks, extreme
bandwidth communication (EBC) emerges as a key enabler to meet the ambitious key …

Quantum key distribution (QKD) is a method for exchanging keys between two parties (Alice
and Bob) with an absolute level of security in the ideal scenario. QKD systems are …

This work analyzes a terrestrial-based free-space quantum key distribution system
employing quadrature-phase shift keying signaling (QKD-QPSK). An analytical framework is …

This paper proposes to design a satellite-based free-space quantum key distribution (QKD)
systems using quadrature phase-shift-keying (QPSK) signaling. Our proposed QKD system …

Sharing a secret key between two physically separated nodes, Alice and Bob, is possible
through the use of quantum key distribution (QKD) techniques. In the presence of an …

We investigate the secret key rates for the recently proposed intensity-modulated dual-
threshold key distribution [T. Ikuta and K. Inoue, New J. Phys. 18 (2016)] under beam …