DefinePK

Abstract

We present in this paper a new symmetrical metaheuristic speech encryption for secure communication. Our approach consists of shuffling the samples of a speech signal using a metaheuristic generated key before transmission. The need for real-time encryption systems for audio communication is increasing due to the widespread of real-time voice applications, such as voice over IP. To minimize any delay, the speech signal is segmented into frames that are encrypted on the spot and transmitted to the receiver. Once received at the receiver side, the speech frame is decrypted and concatenated with the previous speech frames. The objective and subjective measures show that our technique outperforms the existing block encryption algorithms in terms of execution time and security performance.