High security chaotic multiple access scheme for VLC systems

Abstract

In this paper, we present a high security code division multiple access scheme for visible light communication (VLC) systems, and derive the information leakage expression. In our design, we propose to apply chaotic sequences to identify the users in VLC systems. Since the chaotic signals are noise-like and sensitive to the primary condition, only the legitimate users can retrieve the information according to the known primary condition, while the eavesdroppers can not intercept the information. Thus the security of VLC system is enhanced. Simulations are performed and the results show that the presented design can provide high security information transmission for multiple users.