Abstract
This paper studies the design and performance analysis of relay-assisted satellite free-space optics (FSO) quantum key distribution (QKD) systems for secure vehicular networks. High-altitude platforms (HAPs) equipped with optical amplify-and-forward nodes are used as relay stations. Secrecy performances in terms of quantum bit error rate and ergodic secret-key rate are analytically investigated under the effects of transceiver misalignment, receiver's velocity variation, receiver noises, and atmospheric turbulence conditions. Based on the analyzed results, the design criteria for the legitimate user are determined so that the security of the considered system could be guaranteed.
Highlights
Information security plays a significant role in communication networks
ERGODIC SECRET-KEY RATE To evaluate the physical security of the proposed system, we investigate the ergodic secret-key rate, which is defined as the maximum transmission rate between Alice and Bob at which Eve is not able to decode any information from her received signal
At low Earth orbit (LEO) satellite, a bit sequence d [n] is generated by the block Random bit generator. It is modulated by using subcarrier intensity modulation (SIM)/binary phase-shift keying (BPSK) modulator
Summary
Information security plays a significant role in communication networks. Traditionally, information privacy is protected mainly by means of cryptographic algorithms performed at the upper layers of the OSI model. INDEX TERMS Atmospheric turbulence, high-altitude platform (HAP), free-space optics (FSO), pointing error, quantum key distribution (QKD), reciever’s velocity variation.
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