Secure communication system using chaos via DSP implementation

In this paper, we describe DSP experiments of secure communication using chaos signal. Many methods that assume analog circuits have been proposed in this field. However, in practical situation, it seems difficult to maintain both the transmitter and receiver with very high accuracy. Therefore, we try to use digital signal processor (DSP) for modulation and demodulation systems by assuming the digital transmission line such as LAN, etc. DSP is one of single-chip computers which include small scale memory, serial input/output ports and so on. Specifically, DSP has the performance of calculation over 10 MIPS, therefore, almost all the process based on modulation and demodulation can be realized on real time.