This paper offers a thorough research about the current whereabouts of quantum encryption in space communication. Due to the difficulties faced in extending transmission distance beyond a few hundred km, satellites are used as middle nodes. Success of Micius Satellite under QUESS supports the feasibility of such operations. However, multiple factors need to be taken into consideration, which have been listed in this work. Global projects have been undertaken for securing the links with the help of quantum key distribution. Hence, this review paper acts as a backbone, offering major factors effecting this approach.
Key words: Quantum encryption, Space communication, Quantum Key Distribution
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