Digital Image Encryption Implementations Based on AES Algorithm

Abstract

Objectives: To increase needed for exchanging digital photos electronically, due to alarming demand for multimedia applications, and because of the increasing use of images in electronic processes. Hence, the need for protection by unauthorized user is necessary. Method: This paper primarily is focusing on the necessary protection of these images using a specific analyzes algorithm: Advanced Encryption Standard (AES) with a full its description, which is known as an algorithm (Rijndael). Findings: It will be determined the address decryption, which is made up of different styles in all encryption and decryption steps in order to protect the valuable information. This algorithm will be implemented on MATLAB software programming. Application: The above results and analysis for this crypto system based on AES algorithm give a high performance. So we have reason to believe that use this method to encrypt the image will have a very good prospect in the future.

Image Encryption based on a New Generation of Key from Rubik's Cube Principle of AES Algorithm

“…Here, the most important algorithms are going to address which are followed in this research. As mentioned earlier, cryptography divided into two general categories depending on the algorithms used: Symmetric key and asymmetric encryption [1,3,5].…”

“…In addition to being more resistant to current attacks. The AES algorithm consists of 128 block length of bits that support other keys of length 11, 13, or 15 subkeys each of 128, 192 and 256 respectively [1,3,4,7], and 128 bits each have one subkey that corresponds to each round of AES processing; Therefore, each subkey can be indicated to as a round key. Where is the Add Round Key phase, which combines using the XOR function, and the combination of the block of the current state data and the round key matching to the specified round, then the Sub Bytes phase replaces every byte through the fixed lookup table and inserted it into it, and that is between the case data while the four bytes of case data in every row are rotated the Shift Rows phase within an array the process of performing a quad-byte conversion of the case data in every column in the case data array is in the Mixed Columns phase [7].…”

“…Due to the rapid advancement in technology in recent years; it has increased the portability of digital images, which can be easily found online. Therefore, the solution to the preservation of the image data is to encrypt it, as these images have their role in most medical or military applications or various multimedia systems [1]. Cryptology is an important science that transforms data into incomprehensible data so that it cannot be read (encrypted text), depending on an encryption key, and the obverse way is decryption where the incomprehensible text can be retrieved into a clear, readable text depending on the same key [2].…”

“…The encryption process depends primarily on the key used. Hard-to-guess knowledge of the key was difficult to crack the algorithm, so the cipher was split into two categories; symmetric key cipher, and asymmetric key cipher [1,3]. In symmetric encryption algorithm, which is known as a private key, it is used one key for both encryption and decryption process [3].…”

“…Symmetric algorithms are quicker than asymmetric algorithms like AES, DES, Triple DES, etc. Therefore, symmetric algorithms are widely used [1,3]. This paper will provide a brief overview of each of the AES algorithm and the Rubik's Cube that was used to generate the keys of the AES algorithm, in addition to describing the architecture of the proposed method and the way of its implementation in encoding and retrieving images and finally, it will describe the most important conclusions reached through the proposed method.…”