地理空间数据隐藏技术研究与实践

发布时间：2018-12-09 15:27

【摘要】：地理空间数据传输和分发模式的革新使得数据传输对网络的依赖越来越强，而网络普及率的不断提高导致网络数据传输的安全性受到严重威胁。加密技术为数据的安全传输提供了一定的保障，，但避免不了数据被截获和破坏。信息隐藏是信息安全领域中异于加密技术的又一种数据安全技术，它利用特定的载体掩护秘密数据的传输，使数据传输的踪迹消失于茫茫的网络大海之中。本文以信息隐藏技术理论为基础，通过分析地理空间数据网络传输的可能性以及数据网络传输的不可靠性，确定了信息隐藏技术用于空间数据网络传输的可行方案，并建立了空间数据隐藏模型。分别从空间数据预处理和空间数据隐藏两个方面入手，研究设计了几种空间数据预处理和空间数据隐藏的方法，并通过实验进行了验证和比较。论文研究具有一定的理论和实践意义，主要内容和创新点如下： 1．分析并比较了隐藏技术与加密技术之间的异同，以地理空间数据网络传输安全为背景，研究了隐藏技术用于空间数据网络传输的可行性。 2．以信息隐藏理论和空间数据特征为基础，设计了空间数据隐藏的方案和实施流程，建立了空间数据隐藏模型。 3．分别研究了地理空间数据的压缩、加密和分存方法，将通用数据压缩加密方法与地理空间数据相结合，设计了针对空间数据的压缩加密方案，并提出了针对空间数据的分存策略。 4．对常见BMP和JPEG图像、MP3音频和RM视频进行了深入地结构剖析，改进了基于BMP图像的最低有效位隐藏算法，设计并实现了以JPEG图像、MP3音频和RM视频为载体的地理空间数据隐藏方法。 5．对文中空间数据预处理和隐藏方法进行了实验验证，分别比较了压缩、加密和分存不同方法的运算结果和效率，对三种不同载体的容量进行了估算，提出了空间数据隐藏载体选取策略。
[Abstract]:The innovation of geospatial data transmission and distribution mode makes the data transmission more and more dependent on the network, and the increasing popularity of the network seriously threatens the security of the network data transmission. Encryption technology provides a certain guarantee for the secure transmission of data, but it can not avoid the interception and destruction of data. Information hiding is another kind of data security technology in the field of information security which is different from encryption technology. It uses special carriers to cover the transmission of secret data and makes the trace of data transmission disappear in the vast sea of network. Based on the theory of information hiding technology, this paper analyzes the possibility of geo-spatial data network transmission and the unreliability of data network transmission, and determines the feasible scheme of information hiding technology used in spatial data network transmission. A spatial data hiding model is established. From two aspects of spatial data preprocessing and spatial data hiding, several methods of spatial data preprocessing and spatial data hiding are studied and designed, and the experimental results are verified and compared. The main contents and innovations are as follows: 1. The similarities and differences between hiding technology and encryption technology are analyzed and compared. The feasibility of using hiding technology in spatial data transmission is studied. 2. Based on the information hiding theory and spatial data features, the scheme and implementation flow of spatial data hiding are designed, and the spatial data hiding model is established. 3. The compression, encryption and storage methods of geospatial data are studied respectively. The general data compression and encryption method is combined with geospatial data, and a compression encryption scheme for spatial data is designed. A strategy for spatial data sharing is proposed. 4. The structure of common BMP and JPEG images, MP3 audio and RM video are analyzed deeply, the minimum significant bit hiding algorithm based on BMP image is improved, and the JPEG image is designed and implemented. Geospatial data hiding method based on MP3 audio and RM video. 5. The experimental verification of the spatial data preprocessing and hiding methods in this paper is carried out. The computational results and efficiency of different methods of compression, encryption and storage are compared, and the capacity of three different carriers is estimated. The selection strategy of spatial data hiding carrier is proposed.
【学位授予单位】：解放军信息工程大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：P208

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