基于關鍵詞相關度的計算機輔助定密技術研究
[Abstract]:With the rapid development and popularization of computer information technology, information technology has been applied and popularized in more and more fields. Of course, the field of secret technology is no exception, but with the deepening of application management, the problems also appear. One of the problems is that the efficiency of document classification is not high and the accuracy rate needs to be improved under the condition of information technology. The sustainability of memory transmission is not strong and so on. At present, many units adopt the method of manual secret, and the process of keeping secret is not standard and the duty is not clear, the authority of the secret person is not clear, and even there is the problem of "beat the head and fix the secret". In order to solve the above problems, this paper presents a keying method based on keyword correlation analysis, and then designs a computer-aided encryption system, which can not only improve the accuracy of classified work, but also greatly improve the working efficiency. This paper first introduces the relevant background of the work of encryption. Based on the introduction of existing techniques, the semantic network of document based on word activation force is applied to the document vector representation model, and the similarity between documents is calculated on this basis. In this paper, a scheme of classifying secret documents to be determined by classification is proposed. Firstly, this paper studies the segmentation and vectorization of documents based on domain keywords. Secondly, the semantic network of documents is constructed based on word activation force, which adds semantic layer features to the vectorization model of documents. Based on the enhanced vector representation and the basis of the document, the similarity between the undetermined secret document and the pre-encrypted sample document is calculated. Finally, the secret level of the undetermined secret document is determined based on the text similarity. Finally, based on the above encryption method, a computer aided encryption system software is designed and implemented, and the performance of the system is verified. The test results show that the proposed method can effectively assist the steganographer to mark the target document quickly, has a higher accuracy, and consumes less time, so it has a high practical value.
【學位授予單位】:北京交通大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:D631.31;TP391.7
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