Secure speech communication based on the combination of chaotic oscillator and logistic map

This paper uses a combination of a logistic map and a five-term chaotic oscillator to develop a secure speech communication technique. Firstly, an active controller is designed to synchronize the five terms chaotic oscillators at the transmitter and receiver sides. Then, the first encryption level of row-column shift and a bit XOR operation are performed using the chaotic oscillator. It is followed by a bit-level permutation using the combined key, generated by the chaotic oscillator and the logistic map to enhance the security. Various security analysis methods, such as spectrogram analysis, histogram analysis, correlation test, periodogram analysis, SNR analysis, etc. are used to assess the claim of higher security made in this paper. The simulation results confirm that the proposed technique is more secured than some similar available techniques. The proposed technique’s ability to resist various attacks is tested and found to have adequate resistance to various attacks.