Hybrid Call Security System using Encryption & Steganography Samreen Sekhon Brar

Abstract-Most of the users use internet for various voice or video calling applications. Also many companies utilize these applications for their corporate calls (inbound/outbound business calls) with the users outside of their network. To achieve the goal of voice communication security, a number of audio security and audio processing algorithms are in use individually or in a combination to provide the effective voice security. Hacking attacks on these applications can cause great losses to the user security which can lower the number of active users and so the business popularity. In the proposed voice call security model, we have proposed a hybrid approach using compression, encryption and steganography to enable to highest level of security in the voice calling while adding the minimum possible delay in the voice packets delivery. Our proposed framework focuses on the security of voice communications, which can take place over a wired phone, cellular connection or internet. The proposed framework consists of three major components to secure the voice communications over internet or intranet i.e. band pass filter, cryptography or steganography. The voice signal would be decomposed using band pass filters, followed by application of cryptography on all of the bands. All of the signal components after decomposition and encryption would be combined and placed in another voice signal using steganography method. This framework have designed to provide multi-layer security to the sensitive voice calling channels between the VVIP, VIP and other important personal of the nation. The results have proved the effectiveness of the system. The system had been tested for its security level, possibilities of breaching attacks, accuracy, noise (WGN) reduction, compression levels, encryption levels, elapsed time and many other aspects. The proposed framework has proved to be effective in all situations related to the voice communication security