本文選題：矢量地理數(shù)據(jù) + 安全共享��； 參考：《南京師范大學》2013年博士論文

【摘要】：矢量地理數(shù)據(jù)是國家基礎(chǔ)設(shè)施建設(shè)和地球科學研究的支撐性成果之一,在國家經(jīng)濟建設(shè)、國防建設(shè)、社會生產(chǎn)中有著舉足輕重的地位和十分廣泛的應用。隨著矢量地理數(shù)據(jù)共享需求的增加,其安全問題也日益凸顯,侵權(quán)、盜版、泄密、非法傳播與使用等行為屢禁不止,業(yè)已嚴重影響和阻礙了矢量地理數(shù)據(jù)的共享與服務(wù)。因此,如何利用技術(shù)手段解決矢量地理數(shù)據(jù)共享與安全之間的矛盾是當前迫切需要解決的問題。 本文針對矢量地理數(shù)據(jù)共享服務(wù)面臨的安全問題,基于加密技術(shù)、數(shù)字水印等理論和方法,對面向共享的矢量地理數(shù)據(jù)安全關(guān)鍵技術(shù)進行了深入研究,主要研究成果如下： (1)基于矢量地理數(shù)據(jù)共享流程,闡述了矢量地理數(shù)據(jù)共享過程中的特點及安全要求,探討了精度降低技術(shù)、加密技術(shù)、數(shù)字水印技術(shù)等信息安全技術(shù)的科學內(nèi)涵,以及對矢量地理數(shù)據(jù)共享服務(wù)和安全保護的作用。 (2)分析了矢量地理數(shù)據(jù)精度特征,構(gòu)建了矢量地理數(shù)據(jù)精度降低基本規(guī)則和數(shù)學模型。利用集合映射思想,提出了一種基于加法規(guī)則的矢量地理數(shù)據(jù)精度降低模型。該模型在降低數(shù)據(jù)精度的同時,較好地保持了矢量地理數(shù)據(jù)的拓撲關(guān)系和幾何形狀,使數(shù)據(jù)既能達到安全保密要求又能滿足實際應用需求。 (3)利用非線性函數(shù)的特性,提出了一種基于乘法規(guī)則的矢量地理數(shù)據(jù)精度降低模型,并從理論上證明了該方法能夠保持數(shù)據(jù)的位置一致性。采用的非線性變換函數(shù)具有連續(xù)性和遞增性,在保持好的數(shù)據(jù)位置一致性條件下,精度也能夠有效控制。 (4)在分析現(xiàn)代加密技術(shù)優(yōu)勢的基礎(chǔ)上,針對涉密數(shù)據(jù)的安全保護,提出了一種基于AES加密技術(shù)的矢量地理數(shù)據(jù)局部加密模型。通過拓撲約束規(guī)則,保證了矢量地理數(shù)據(jù)在局部加密、解密過程中的數(shù)據(jù)可用性,提高了矢量地理數(shù)據(jù)的安全性。同時,研究了加密技術(shù)和水印技術(shù)相結(jié)合的矢量地理數(shù)據(jù)安全服務(wù)方法。 (5)闡明了矢量地理數(shù)據(jù)多級分發(fā)的應用模式、性能評價和算法設(shè)計思想。提出了一種基于雙向映射的矢量地理數(shù)據(jù)兩級數(shù)字水印模型,有效解決了兩次嵌入水印信息相互覆蓋的問題,且能保持單級數(shù)字水印算法的強魯棒性。 (6)為了滿足更多級的數(shù)據(jù)分發(fā)需求,提出了一種基于水印信息分段的多級水印算法。該算法采用水印信息先分段再合成的水印信息生成模式,有效增加了水印嵌入和數(shù)據(jù)分發(fā)的級數(shù),為矢量地理數(shù)據(jù)多級分發(fā)提供了可行的、安全的技術(shù)手段。 (7)針對數(shù)據(jù)分發(fā)次數(shù)的變化性和不可預測性,提出了一種基于四叉樹動態(tài)分塊的多級水印算法。該算法可以動態(tài)添加水印信息,克服了靜態(tài)多級水印只能事先確定分發(fā)次數(shù)的約束,有效提高了多級水印技術(shù)的靈活性和適應性。
[Abstract]:Vector geographic data is one of the supporting achievements in national infrastructure construction and earth science research. It plays an important role and is widely used in national economic construction, national defense construction and social production. With the increasing demand for vector geographic data sharing, its security problems have become increasingly prominent, infringement, piracy, leaks, illegal dissemination and use of such acts as repeated prohibitions, has seriously affected and hindered the sharing of vector geographic data and services. Therefore, how to solve the contradiction between vector geographic data sharing and security by technical means is an urgent problem to be solved. Aiming at the security problems faced by vector geographic data sharing service, based on the theory and method of encryption and digital watermarking, this paper makes a deep research on the key technologies of shared vector geographic data security. The main research results are as follows: Based on the flow of vector geographic data sharing, this paper expounds the characteristics and security requirements of vector geographic data sharing, and discusses the scientific connotation of information security technology, such as precision reduction technology, encryption technology, digital watermarking technology, etc. And the role of vector geographic data sharing service and security protection. (2) the accuracy characteristics of vector geographic data are analyzed, and the basic rules and mathematical model for reducing the accuracy of vector geographic data are constructed. Based on the idea of set mapping, a model for reducing the accuracy of vector geographic data based on additive rule is proposed. The model not only reduces the precision of the data, but also maintains the topological relation and geometric shape of the vector geographic data, so that the data can not only meet the requirements of security and confidentiality, but also meet the requirements of practical applications. 3) based on the characteristics of nonlinear function, a reduction model of vector geographic data accuracy based on multiplication rule is proposed, and it is proved theoretically that the method can maintain the consistency of data position. The nonlinear transformation function is continuous and incremental, and the accuracy can be controlled effectively under the condition of keeping good data position consistency. 4) based on the analysis of the advantages of modern encryption technology, a local encryption model of vector geographic data based on AES encryption technology is proposed for the security protection of secret data. The availability of vector geographic data in the process of local encryption and decryption is ensured by topological constraint rules, and the security of vector geographic data is improved. At the same time, the security service method of vector geographic data combining encryption technology and watermark technology is studied. The application mode, performance evaluation and algorithm design of vector geographic data multilevel distribution are expounded. This paper presents a two-level digital watermarking model for vector geographic data based on bidirectional mapping, which effectively solves the problem of twice embedding watermark information covering each other, and can maintain the strong robustness of single-level digital watermarking algorithm. In order to meet the requirement of multi-level data distribution, a multi-level watermarking algorithm based on watermark segmentation is proposed. In this algorithm, the watermark information is generated by subsection and synthesis, which effectively increases the series of watermark embedding and data distribution, and provides a feasible and secure technical means for multi-level distribution of vector geographic data. In view of the variability and unpredictability of data distribution, a multi-level watermarking algorithm based on quadtree dynamic partitioning is proposed. The algorithm can dynamically add watermark information, overcome the constraint that static multilevel watermarking can only determine the distribution times in advance, and effectively improve the flexibility and adaptability of multi-level watermarking technology.
【學位授予單位】：南京師范大學
【學位級別】：博士
【學位授予年份】：2013
【分類號】：P208;TP309.2

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