A Novel Fuzzy Encryption Technique Based on Multiple Right Translated AES Gray S-Boxes and Phase Embedding

Abstract

This paper presents a novel image encryption technique based on multiple right translated AES Gray S-boxes (RTSs) and phase embedding technique. First of all, a secret image is diffused with a fuzzily selected RTS. The fuzzy selection of RTS is variable and depends upon pixels of the secret image. Then two random masks are used to enhance confusion in the spatial and frequency domains of the diffused secret image. These random masks are generated by applying two different RTSs on a host image. The decryption process of the proposed cryptosystem needs the host image for generation of masks. It is therefore, necessary, to secure the host image from unauthorized users. This task is achieved by diffusing the host image with another RTS and embedding the diffused secret image into the phase terms of the diffused host image. The cryptographic strength of the proposed security system is measured by implementing it on several images and applying rigorous analyses. Performance comparison of the proposed security technique with some of the state-of-the-art security systems, including S-box cryptosystem and steganocryptosystems, is also performed. Results and comparison show that the newly developed cryptosystem is more secure.

Efficient construction of a substitution box based on a Mordell elliptic curve over a finite field

“…where α ∈ GF (2 8 ), γ ∈ GF (2), β ∈ GF (2 8 )\{0} and "·" represents dot product over GF (2). An S-box with high NL is capable of generating high confusion in the data.…”

“…where △x, △y ∈ GF (2 8 ), and "⊕" is bit-wise addition over GF (2). The smaller is the value of DAP, the higher is the security of the S-box against differential approximation attacks.…”

Block based Cipher Key Image Encryption Algorithm combined with Compression using DWT

“…The model is quite perfect and sufficient for a wide variety of image processing applications. A novel approach to digital image safety using steganography cryptosystem described by Azam [2], where encryption is based on RTS's gray-scale substitution boxes and stage embedding technique. RTSs are fuzzily and variable size dependent on confidential image pixel size.…”

Digital Image Security: Fusion of Encryption, Steganography and Watermarking

“…A novel approach to digital image security using cryptosystem with steganography presented by Azam [3], in which encryption is based on gray-scale substitution boxes (sboxes) of RTSs and phase embedding method. RTSs depend upon secret image pixel size fuzzily and of variable size.…”

“…Table 1 represents the numerous security techniques which are found in the literature for the security of digital image. Azam [3] Steganography using grayscale substitution boxes using fuzzy logic and phase embedding technique.…”