Securing Audio with 3D-Chaotic Map Based Hybrid Encryption Technique

Abstract

In today's digital life, the use of digital data is growing at a faster rate due to the introduction of evolving and progressive technologies. Currently, many tasks such as shopping, communication, education, research, etc are being performed online using Internet which may not be a secure platform for all these tasks, all the time. Security being a key requirement of data communication, developing a cryptosystem that satisfies the CIA (Confidentiality, Integrity, Availability) triad to protect sensitive user information from unauthorized users is a challenging research problem. This paper suggests an audio encryption crypto model that provides a high degree of security to audio data. The novelties of this work are, use of three different 3D Fibonacci-Lucas maps in succession for strengthening robustness of the the proposed cryptosystem against various attacks. The uses of Latin and magic squares enhances the level of confusion and diffusion. Latin square helps in nullifying the histogram analysis attack by equalising the histogram and magic square in improving the spectrogram of the encrypted media. This cryptosystem is suitable for both mono and stereo audio files and the strengths of this cryptosystem are confirmed through different testing parameter analyses, including low correlation (-0.0002), high NSCR (99.9996%), low SSNR (-20.9298dB), and low PSNR (+1.4448dB).