矢栅一体的地理数据几何精度脱密模型与方法研究

项目名称： 矢栅一体的地理数据几何精度脱密模型与方法研究

项目编号： No.41371374

项目类型： 面上项目

立项/批准年度： 2014

项目学科： 天文学、地球科学

项目作者： 周卫

作者单位： 南京师范大学

项目金额： 75万元

中文摘要： 地理数据脱密对于国家安全、数据共享和地理信息产业发展具有重要的现实意义。本研究针对矢量和栅格地理数据的特点和安全保护要求，在分析矢栅地理数据空间变换特征基础上，研究构建非线性混合脱密模型。基于混沌序列生成控制点，采用径向基函数等逼近算法，实现矢量和栅格数据几何精度脱密和可逆变换。研究的模型和算法具有矢栅变换一致性、基本拓扑关系不变以及变换的随机性、可逆性和抗攻击性等特征，在密钥控制下能够实现矢量和栅格数据的几何精度脱密和恢复。模型和算法既要实现地理数据精度的降低，也要确保地理数据的可用性，为数据更新与专题数据集成以及地理数据共享服务的安全奠定基础。本项目的研究可为地理信息安全提供脱密的理论和方法基础。

中文关键词： 矢栅一体;几何精度;脱密算法;混合模型;可逆变换

英文摘要： Geographic data decryption is of important practical significances to national security, data sharing and the development of geographic information industry. According to the characteristics and security requirements of vector and raster geographic data, the overall objectives of this research project are to put forward a nonlinear mixed decryption models based on the analysis of the characteristics of vector and raster geographic data space transformation, generate control points based on chaotic sequence, use radial basis function and other approximation algorithms, and realize the geometric precision decryption and reversible transformation of vector and raster data. The models and algorithms possess the characteristics of vector and raster transformation consistency, the invariance of basic topological relations as well as the randomness, reversibility and resistance to attack of transformation, and realize the geometric precision decryption and restore of vector and raster data under the control of secret key. The models and algorithms achieve not only the reduction of geographic data precision, but also the availability of geographic data, and lay the foundation for data updating and thematic data integration as well as the security of geographic data sharing services. The achievements of this project will provide theory and basic methods of decryption for geographic information security.

英文关键词： Vector-Raster Consistency;Geometric Precision;Decryption Algorithms;Mixed Model;Reversible Transformation