A New Assessment of Quantum Key Distribution, Attenuation and Data Loss over Foggy, Misty and Humid Environment

Abstract

Quantum encryption is a method of key transfer in cryptography by using quantum entanglement of photons. The real power of quantum entanglement is instantaneous communication that is non intercept able. The advantage of quantum encryption method is, it can be incorporated with conventional encryption methods safely. The quantum cryptography can replace conventional key exchange mechanism with the polarized photons using channels like optic fiber cables. Quantum cryptographic can also provide far and secure data communication. The present day experiments clearly proved that the quantum cryptography can be implemented through medium like optic fiber cable or air. But the distance of transmission through the air is limited by rule of line of sight propagation. The quantum key distribution will have uses in different types of communication between distant parts of earth. So this paper discussing various aspects of Quantum key distribution and successfully calculated polarized photon loss during transmission of Quantum cryptography link, while using in various type of atmospheric conditions like Mist Fog Haze. Also successfully calculated probability of single polarized photon missing by successfully utilizing the Light transmission characteristics and power measurements in various Atmospheric conditions

Prediction of Transmittance for a Free Space Quantum Channel and Improving Quantum Keyrate in Adverse Atmospheric Condition

“…Probability Distribution of Transmittance (PDT) facilitates the monitoring of atmospheric transmission, thereby contributing to a better understanding of climate patterns and solar radiation behaviour. PDT provides information about the probability of different levels of light or signal transmitting through a material or medium which can be utilized to design and optimize quantum systems within desired performance results [12]. Here the probability distribution is calculated based on gaussian form of photon source.…”

“…The variation of Keyrates for continuous-variable quantum key distribution under rainy and foggy weather are analyzed in [11]. In [12], prediction of photon loss due to fog is being demonstrated. The waveform shaping method is used in [13]to study effect of atmospheric scattering on QKD.…”