Secure Opto-Audio Cryptosystem Using XORing Mask and Hartley Transform

Osama S Faragallah,Hala S El-Sayed

doi:10.1109/access.2021.3055738

Osama S Faragallah, Hala S El-Sayed

Open Access

https://doi.org/10.1109/access.2021.3055738

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Abstract

This research paper proposes a secure opto-audio cryptosystem using XORing mask and Hartley transform (HT). The digital one dimensional (1D) plainaudio data is converted into two dimensional plainaudio map (2D PAM) and after that, the 2D PAM is divided into 2D plainaudio blocks (2D PABs). The basic idea of the proposed opto-audio encryption system depends on XORing each block of the 2D PABs with a single image selected from a personal image database that can be viewed as a secret key in the proposed opto-audio cryptosystem. Each block of the mixed 2D PABs is then transposed using the chaotic logistic adjusted sine map (LASM) and optically encrypted with HT. The XOR and LASM are implemented digitally while HT implemented optically. An additional XORing mask step helps to remove residual intelligibility from the 2D PABs, fill in speechless gaps in spoken conversations, and destroy both the pitch and format details. The utilization of chaotic LASM allows efficient noise immunity. A comparative study is held between the proposed opto-audio encryption system and other related audio encryption systems in terms the standard well known encryption metrics. The results have confirmed the efficiency of the introduced opto-audio encryption system. The proposed opto-audio encryption system security is explored from an accurate encryption point of view, and tests confirmed the superiority of the proposed opto-audio encryption system from the encryption point of view.

Highlights

Due to the fast evolution of recent telecommunication systems, the field of information security has raised a lot of serious challenges
Each block of mixed 2D plainaudio blocks (2D PABs) resulted from the XORing mask procedure is scrambled using logistic adjusted sine map (LASM) and optically encrypted with Hartley transform (HT)
The results demonstrated that the peak signal to noise ratio (PSNR) of decrypted audio increases with increasing the compression ratio with different SNR

Summary

INTRODUCTION

Due to the fast evolution of recent telecommunication systems, the field of information security has raised a lot of serious challenges. In [25], the authors utilize high dimensional chaotic map for improving the security and key space of iterative audio encryption scheme. The authors in [47] introduced a chaotic image encryption scheme using a matrix semi-tensor product (STP) with a complex secret key. The paper presents an efficient optical audio cryptosystem approach using XORing mask, LASM, and HT-based optical encryption. Each block of mixed 2D PABs resulted from the XORing mask procedure is scrambled using LASM and optically encrypted with HT. Both of XOR and LSLM are implemented digitally while HT implemented optically. The mixed 2D PABs is transposed using the chaotic LASM and optically encrypted with HT

PROCESS OF RESHAPING THE 1D DIGITAL PLAINAUDIO INTO 2D PAM

Employ XORing mask between the chosen image

DECRYPTION OF THE OPTO-AUDIO CRYPTOSYSTEM

EXPERIMENTAL TESTS

QUALITY OF ENCRYPTED AUDIO

CONCLUSION