Secure Image Encryption based on Baker Chaos Function

Abstract

Image information is important, especially in the field of military. When those images are transmitted over the communication channel, it needs the privacy. There are a lot of image encryption algorithms. Because of storing large size of pixels, most of the functions are not appropriate for the image encryption. This paper presents an alternative symmetrickey encryption algorithm for securing images, namely Secure Image Encryption based on chaos. Generally, it comprises of three main components: (1) horizontal-vertical transformation function (HVT); (2) shift function (S), and (3) gray scale function (GS). HVT function is based on a twodimensional chaotic map that utilized Baker’s map algorithm. GS function extends the algorithm to three-dimension, whereby, the third dimension refers to the level of the grayscale of a pixel. This secure image encryption applies to encrypt military images, such as Maps, Buildings, Army forces, etc.