Abstract
Quantum key distribution (QKD) assures the theoretical information security from the physical layer by safely distributing true random numbers to the communication parties as secret keys while assuming an omnipotent eavesdropper (Eve). In recent years, with the growing applications of QKD in realistic channels such as satellite-based free-space communications, certain conditions such as the unlimited power collection ability of Eve become too strict for security analysis. Thus, in this invited paper, we give a brief overview of the quantum key distribution with a geometrical optics restricted power collection ability of Eve with its potential applications.
Highlights
We present an overview of the geometrical optics restricted quantum key distribution with certain power collection restrictions applied on Eve
We introduce the on geometrical optics restrictedInmodel realistic chann power restriction the eavesdropper
We provided a brief overview of the geometrical optics restricted Quantum key distribution (QKD)
Summary
Different from the asymmetric cryptography used today, QKD is based on symmetric cryptography, guaranteeing the secure distribution of the secret keys with the laws of quantum mechanics that the measurement process generally disturbs the measured system. This can be used to detect eavesdropping actions as any adversaries would have to perform measurement to eavesdrop.
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