An Efficient speech scrambling technique based on chaotic mapping and pseudorandom binary scrambling

To enhance the information security in network communications, this paper suggests a new speech scrambling algorithm based on random permutation, chaotic mapping and pseudo random binary scrambling.Firstly random permutation algorithm is used to shuffle the rows of the original speech followed by shuffling the rows using chaotic Bernoulli mapping. This produces an intermediary scrambled speech. In the second step, pseudo random binary generator and chaotic encryption are utilized to make the final scrambled signal. Various analysis tests are then performed to determine the quality and intelligibility of the recovered speech. The suggested scheme for speech scrambling can resist traditional attacks and it indicates a good level of protection. Also, it can retrieve the original signal with excellent quality, quickly and efficiently.