Experimental Research on Application of Quantum Key in Video Conference System

Abstract

Data transmission in the traditional video conference system is facing certain security risks currently, for which an experiment scheme for application of quantum key in the traditional video conference system is designed in this paper. As for this scheme, quantum gateway is seamlessly embedded into the traditional video conference system, based on which data transmitted through video conference system can be encrypted by the quantum key generated by such quantum gateway. Based on the reality of relatively low code generation rate of quantum key of quantum gateway, a new quantum key expansion algorithm is put forward and feasibility of such algorithm is verified by using NIST frequency test standard. Quantum keys with different error rates are used to conduct encryption and decryption of three 720p single-screen video images respectively, in addition to which Peak Signal to Noise Ratio (PSNR) of the original images and decrypted images are calculated. It can be proved through comparison between such values and theoretical calculated values that quantum key can ensure normal image quality of video. This experiment is of great significance for applying quantum key in real video conference systems and ensuring security of video data transmission.