Advantages And Disadvantages Of Cellular Automata

unauthorized access to digital information occurs every day and has become one of the challenges of the digital world. Therefore, individuals must take attention to security and confidentiality of multimedia information. Among various maintenance approaches, encryption methods is one of the most effective and conventional ways to protect multimedia information. One the widely known models for image encryption is Cellular Automata (CA). CA is a self-organized structure with a set of cells in which each cell is updated by certain rules that are dependent on a limited number of neighboring cells. The major disadvantages of cellular automata in cryptography include limited number of reversal rules and inability to produce long sequences of states
Also, misused and unauthorized access to personal and private information has become a serious challenge in the digital world. Encryption is a classic and efficient method to solve these issues. However, traditional standard methods such as DES and AES are typically designed for textual information. Those methods due to certain characteristics such as large data and high correlation among pixels are not suitable for multimedia information
Chaos sequences are created by chaotic mapping which are random sequences. These structures are too complex and difficult to analyze and predict [4-8]. Considering these features, many encryption algorithms based on chaos have been investigated and studied extensively [9-14]. In [9] a new image encryption algorithm based on chaotic system and rotation shift is provided. Given that the rotation shift has many features such as simplicity, efficiency and flexibility in different size images which can increase the security of encryption scheme and be resistive against known attacks. Wang and Luan [10] presented a high dimensional permutation bit-level method based on chaos system. Wang et al [11] presented a new color images encryption algorithm based on Logistic mapping and used the combination of confusion and diffusion to reduce relation between color components. In [12], the spatiotemporal chaos is employed to confuse blocks and change pixel values simultaneously. In [13] an image encryption algorithm presented based on bit permutation of three-dimensional matrix. Enayatifar et al designed an image encryption algorithm using the combination of DNA mask and genetic algorithm and used Logistic mapping as a key and initial population generation for genetic algorithm