The Research Of Digital Steganography Based On Jpeg Picture

From the nineties of the last century, along with computer and network technology, the rapid development and wide application of various kinds of information can be no obstacles in the network quickly and easily transfer, but the convenience and practicality of the network to bring people to facilitate at the same time also gave rise to an information security risks, all kinds of illegal means to steal an endless stream of important information. Thus, the information hiding technique has become a major research focus. Digital steganography technology as an important branch of information hiding, can vector in a variety of media to achieve its function, it can achieve covert communication. Among them, JPEG image as the carrier of the digital steganography technology become more popular.This study the content and research results include the following aspects:1. In order to propose the new algorithm,this paper introduced and simulated LSB, Jsteg, F3, F4, F5 steganography algorithms, its simulation results are compared and analyzed the characteristics and benefits of these technologies.2. Secret information as a text in a text steganography program of the correct rate of extraction of information, Proposed the use of Hamming code applied to them, with a view to enhance its robustness to improve extraction accuracy.3. Secret information as a digital image, proposed a method of scrambling and encryption methods to improve the security of the secret information.4. Simulated the steganography algorithms by MATLAB , compared with the histogram, PSNR, and the amount of information hiding to evaluate the applicability of its programs. Finally we have the method simulated by MATLAB. The results show that the proposed algorithm is easy to implement, without prejudice to its hidden under the premise to have a better steganalysis features, good image quality, By the results of simulation data, the amount of information hiding, information embedding rate and the image peak signal to noise ratio by comparison, as a text message Hamming encoded data, At the expense of the amount of a certain amount of information hiding under the premise of making secret writing secret information after the security and robustness more. Secret information as a digital image, the addition of images and image scrambling encryption technology, making their safety and better.