An Image Encryption Scheme and Its Android Application Using Robust Chaotic Map with Absolute Value Nonlinearity

Sivapong Nilwong, Wimol San-Um
This paper presents a chaos-based image encryption approach for an Android application based on a chaotic map with absolute value nonlinearity. The chaotic map with absolute value nonlinearity is analyzed and dynamic properties are described in terms of bifurcation diagram and Lyapunov Exponent (LE) spectrum before employing in the Android application. The process of encryption and decryption of the implemented Android application are designed based on XOR operation of the separated color plane of the plain image and the key image which is generated from the chaotic map. The encryption performances of the application are evaluated, qualitatively through the pixel density histogram and pixel correlation plots and quantitatively through encryption time and correlation coefficients.