Research On Bank Electronic Document Integrity Protection Based On The Watermarking Technology

Today,the electronic information technology and data compression transmission technology developed rapidly, business and office automation gradually become electronic, include the bank,the application of the electronic documents gradually increased. Considering the special status of the bank in the society, the information contained in the electronic documents are associated with capital business,So the slightest change of the data content may cause significant economic loss. As an important branch of Information hiding technology, Digital Watermarking was applied into field of copyright protection, especially the fragile digital watermarking in the category, its characteristics of the application can apply into protecet digital products for content authentication has its unique superiority.Based on the analysis of the current fragile watermarking technology research, the main work and innovation of this paper are as follows:(1)Analysis the current situation of information security of electronic document transmission faced by bank, including the documents’ characteristics、attack types in the transmission,pointed out the importance of document content authentication based on the background and needs of the bank.(2)Innovation include the design of the improved LSB algorithm, by use of the whole bank electronic document as the carrier of the image segmentation, use it for image segmentation select one part as a carrier, and then select a part of the same size as the embedding watermark, the watermark image is digital images, the gray histogram is polarized, so we can use Matlab program to binarization, then use LSB algorithm for embedding. By this method to develop a watermark which can location the tamper. Through the experiment we found out that this point can accurately detect the tampered image, and can locate the tampered part.(3) Based on changed algorithm LSB, designed an authentication scheme for the protection of bank electronic document, proves of the algorithm in this paper, in the first place,bring the document image into image segmentation and contrast of the embed watermark and the the original watermark to detect the tamper, through lots of attack experiments in the Matlab.r2012 a experimental environment. The result verified the superiority of the scheme the accurate detection and the tampered positions in terms of document image tampering.The main innovation of this paper lies in the innovation of application. Through the analysis of relevant research in China, it is found that there are some applications of digital watermarking technology in bank information security protection, such as bank IC card anti copy, paper printing anti fake and so on. But in the field of information security protection for bank electronic documents, the application of digital watermarking technology is still rare. Therefore, the research of this paper has novelty.