Digital Image Encryption Algorithm Based on Chaos and Improved DES
In recent years, encryption technology has been developed quickly and many image encryption methods have been put forward. Chaos based image encryption technique is a new encryption technique for images. It utilizes chaos random sequence to encrypt image, which is an efficient way to deal with the intractable problem of fast and highly secure image encryption. However, the chaos based image encryption technique has some deficiencies, such as the limited accuracy problem. This paper researches on the chaotic encryption, DES encryption and a combination of image encryption algorithm, and simulate these algorithms, through analysis of the algorithm to find the gaps. And on this basis, the algorithm has been improved. The new encryption scheme realizes the digital image encryption through the chaos and improving DES. Firstly, new encryption scheme uses the logistic chaos sequencer to make the pseudo-random sequence, carries on the RGB with this sequence to the image chaotically, then makes double time encryptions with improvement DES, displays they respective merit. Theoretical analysis and the simulation indicate that this plan has the high starting value sensitivity, and enjoys high security and the encryption speed. In addition it also keeps the neighboring RGB relevance close to zero. The algorithm can be used in the actual image encryption.
[Show abstract] [Hide abstract] ABSTRACT: Security of the multimedia data including image and video is one of the basic requirements for the telecommunications and computer networks. In this paper, a new efficient image encryption technique is presented. It is based on modifying the mixing matrix in Independent Component Analysis (ICA) using the chaotic Arnold’s Cat Map (ACM) for encryption. First, the mixing matrix is generated from the ACM by insert square image of any dimension. Second, the mixing process is implemented using the mixing matrix and the image sources the result is the encryption images that depend on the number of sources. Third, images decrypted using ICA algorithms. We use the Joint Approximate Diagonalization of Eigen-matrices (JADE) algorithm as a case study. The results of several experiments, PSNR, SDR and SSIM index tests compared with standard mixing matrix showed that the proposed image encryption system provided effective and safe way for image encryption.0Comments 0Citations
- "Over the years, there has been an important development in the field of information security. Yun-Peng et al.  presented the encryption scheme that realizes the digital image encryption through the chaos and improving DES. First, encryption scheme uses the logistic chaos sequencer to make the pseudo-random sequence, carries on the RGB with this sequence to the image chaotically, makes double time encryptions with improvement DES, and displays the respective merit. "
- "Protection of important information during transmission becomes an important issue and is therefore concealed by encryption. Encryption  is the art of writing in cipher which is not intelligible to the person who does not have the key to decipher it. The two kinds of encryption are cryptography and steganography. "
[Show abstract] [Hide abstract] ABSTRACT: A new image encryption scheme based on hyper chaotic system and Fuzzy Cellular Automata is proposed in this paper. Hyper chaotic system has more complex dynamical characteristics than chaos systems. Hence it becomes a better choice for secure image encryption schemes. Four hyper chaotic systems are used to improve the security and speed of the algorithm in this approach. First, the image is divided into four sub images. Each of these sub images has its own hyper chaotic system. In shuffling phase, Pixels in the two adjacent sub images are selected for changing their positions based upon the generated numbers of their hyper chaotic systems. Five non-uniform Fuzzy Cellular Automata used in encryption phase. Used rule to encrypt a cell is selected based upon cell's right neighbor. By utilization of two different encryption methods for odd and even cells, problem of being limited to recursive rules in rule selecting process in these FCAs is solved. The results of implementing this scheme on some images from USC-SIPI database, shows that our method has high security and advantages such as confusion, diffusion, and is sensitive to small changes in key.0Comments 0Citations
- "Since then, many encryption methods based on chaotic systems presented. Author in , presented an encryption algorithm based on chaotic systems and improved DES algorithm. In the proposed method by Guan et al. at  The pixels positions in the plain image is shuffled to disturb the high correlation among adjacent pixels, using the Arnold cat map. "