System on chip implementation of new information hiding method

Information security systems are a part of daily life nowadays. For these reason, their applications are getting more and more significant. Steganography and Cryptography are most important fields of it. In this thesis, you can be aware of what Steganography and Cryptograhy are, what their applications and methods are, especially Steganography methods applied on spatial domain. Then, new data hiding method which is improving neighbor mean interpolation method is proposed. Thanks to proposed method, data hiding process is applied according to a key like cryptography approach. Proposed method can be summarized like that changing scan path of embedding process according to symmetry map which is calculated by pixel symmetry. In addition to explaining new method, the method is also tested on personal computer and embedded hardware. Proposed method is firstly created with Matlab software on desktop computer. Then, proposed method is applied on Zynq embedded system which has hybrid processor architecture. Embedded system application is tested on AVNET's ZedBoard. In order to create this system, firstly development environment of embedded Linux operating system is created on Linux operating system running on personal computer. Then, Embedded Linux run on ZedBoard. In addition, OV7670 camera sensor is integrated with this system and image frame coming from the camera can be writen to memory directly. this frame also can be read for VGA output by using FPGA part of Zynq. In fact, proposed method's data hiding proses is applied by creating software for ARM based processor part of Zynq. Thanks to this thesis, you can also learn installation of Xilinx development environment, installation of cross-compiling environment for embedded Linux systems, writing device drivers for embedded Linux systems, usage of i2c module inside processor part of Zynq and applying image processing application by creating user space application on embedded Linux operating system. In this thesis, there are six chapters. In chapter 1, you can infer purpose of writing this thesis and what information security systems are. Then you can examine digital information hiding and scrambling methods in chapter 2. New data hiding method is explained in chapter 3. The implementations about proposed method are showed in chapter 4. Experiments and their results are inferred in chapter 5 and in last chapter conclusions are cited. Comparing results of previous and proposed methods, you can infer same visual quality and similar computation number. The image which is used for covering, cover image, and the image which is produced after data hiding process, stego image, look similar to each other. You can understand it according to calculation PSNR value between cover and stego images. PSNR results are always stay higher than 35 dB. This result shows that data hiding process is imperceptible.