Speech encryption algorithm using FFT and 3D-Lorenz–logistic chaotic map

In this paper a new speech encryption method using Fast Fourier Transform (FFT) and multiple chaotic maps has been developed for secured speech communication. In order to improve the drawbacks namely residual intelligibility in encrypted signal, poor quality in decrypted signal, low key space and high computational complexity that prevail in the exist speech encryption methods, a novel speech encryption algorithm based on a three dimension (3D)...