Control Code Multiple Encryption Algorithm on Satellite-to-ground Communication
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The transmission security between ground station and satellite is challenging. Some existing multistep algorithms leave lots of loopholes for eavesdropping and attacking in satellite-to-ground communication. For high security, optical communication is a promising solution. In this paper, we propose a control code multiple encryption algorithm (CCMEA) for the single-photon-transmission between satellite and ground station. CCMEA can utilize the control code to respectively encrypt three cognitive optimization sections: loop iteration, polarization coding and order rearrangement, and simulation shows that CCMEA can realize one step transmission to decrease loopholes compared with multistep encryption algorithm. In addition, we design a security detection method by combining the decoy photon analysis and the quantum bit error rate (QBER) analysis. The numerical results show that CCMEA can reduce the security threshold by 27% compared with multistep encryption algorithm of BB84 scheme. Finally, for satellite-to-ground communication, we construct an analytic QBER model on CCMEA with four factors: quantum channel transmission rate, single-photon acquisition probability, measurement factor and data filtering factor. The result demonstrates the effectiveness of CCMEA on satellite-to-ground communication.
KeywordsControl code multiple encryption algorithm (CCMEA) Quantum bit error rate Security detection Satellite communication
This work was supported by the National Natural Science Foundation of China (Grant No. 61601145, 61471142, 61571167, 61871157), the Fund of Aeronautics Science of China (Grant No. ASFC-2017ZC77004), SAST fund (Grant No. SAST2017050) and HIRP fund (Grant No. HO2017050001C9).
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