The Research In Secret Information Detection Of Text And Image

With the rapid development of computer network technology,image processing technology and the widespread application,the government,the enterprise and the individual life are more convenient.At the same time,it also brings some problems should not be underestimated.There are a large number of picture and text files in the computer of some important government agencies and the business sector,which is an important carrier of all kinds of information,how to prevent the leakage of the files involved state secrets and business secrets of the imminent.Graphics and text file secret information detection is one of the important means to prevent the disclosure of information,dependent on the pattern matching technique,and we always need to detect the source of the image file.The main contents of this paper are as follows:(1)Pattern matching algorithm.Through the analysis of the existed pattern matching algorithm,we summed up the deficiencies in the secret information detection technology with using existing pattern matching algorithm,then we proposed an improved AC BMS algorithm based on the AC_BM algorithm.AC_BMS algorithm for establishing two-character jump table in the preprocessing stage,the application of the two-character jump table may increase the probability of a mismatch.while introducing a second chance to jump,we can skip over longer distances when a mismatch occurs.By time complexity analysis and experiment,it shows that AC_BMS algorithm can greatly improve the efficiency of the matching process,also can improve the detection efficiency in the secret information detection.(2)Research on image source detection technology.By analyzing the generation process of computer generated images and natural images,the texture features of the color co-occurrence matrix are used to distinguish natural images and computer generated images.The experimental results show that the method proposed in this paper is effective and has a good stability.(3)Complete the design of secret information detection system with using the proposed pattern matching algorithm and the image source identification algorithm.The prototype system's function is clear,we can use it to detect the secret information in the image and text file conveniently.