  Quantum key distribution is an effective encryption technique which can be
used to perform secure quantum communication between satellite and ground
stations. Quantum cryptography enhances security in various networks such as
optical fibers and wireless networks. In addition to this, these networks
become vulnerable in presence of high attenuation due to atmospheric effects
and noise. Hence, errors occur due to decoherence. The noisy quantum channel is
modeled and implemented by the redundancy-free quantum error correction scheme
which provides better security and throughput efficiency as shown in simulation
results.
