基于数字指纹的矢量地理数据几何脱密算法  

Geometric Declassification Method of Vector Geographic Data Using Digital Fingerprint Technology

作　　者：王宇璇 闫浩文 张黎明 王小龙 WANG Yuxuan;YAN Haowen;ZHANG Liming;WANG Xiaolong(Faculty of Geomatics,Lanzhou Jiaotong University,Lanzhou 730070;National Local Joint Engineering Research Center of Technologies and Application for National Geographic State Monitoring,Lanzhou 730070;Gansu Provincial Engineering Laboratory for National Geographic State Monitoring,Lanzhou 730070;Academician Expert Workstation of Gansu Dayu Jiuzhou Space Information Technology Co.,Ltd.,Lanzhou 730070;College of Earth and Environmental Sciences,Lanzhou University,Lanzhou 730000,China)

机构地区：[1]兰州交通大学测绘与地理信息学院,甘肃兰州730070 [2]地理国情监测技术应用国家地方联合工程研究中心,甘肃兰州730070 [3]甘肃省地理国情监测工程实验室,甘肃兰州730070 [4]甘肃大禹九洲空间信息科技有限公司院士专家工作站,甘肃兰州730070 [5]兰州大学资源环境学院,甘肃兰州730000

出　　处：《地理与地理信息科学》2023年第5期17-21,38,共6页Geography and Geo-Information Science

基　　金：甘肃高等学校产业支撑引导项目“地理空间数据数字指纹系统及应用示范”(2019C-04);国家自然科学基金面上项目“基于公钥密码体制的矢量地图非对称数字指纹方法”(42271430);国家自然科学基金项目“面向内容的矢量地图数据认证与版权保护方法研究”(41761080)。

摘　　要：为平衡保密与共享的矛盾,现主要采用脱密技术实现矢量地理数据在安全保护前提下的共享,其中,常利用非线性变换方法进行几何精度脱密,而在地理空间数据中嵌入数字指纹,可达到版权保护的目的,但会对空间数据造成一定误差。该文提出一种可溯源的矢量地理数据脱密算法,利用可控误差的数字指纹嵌入,实现对矢量地理数据进行几何精度脱密和版权保护的双重目的,脱密后数据能保持较好的图形形态及空间关系,且可用性较强,实现了脱密数据在使用时的版权保护,可为“合理保密,充分使用”的矢量地理数据共享需求提供支撑。To balance the contradiction between data confidentiality and sharing,declassification technology is mainly used to achieve shared access to vector geographic data under the premise of robust security measures.Among the existing techniques for geometric accuracy declassification,nonlinear transformations have gained widespread adoption to render data suitable for public use.One notable method entails embedding digital fingerprints within geographic spatial data,thereby achieving copyright protection goals alongside introducing certain delicate errors into the geographic spatial data.Building upon this core idea,this paper introduces a novel traceable declassification method tailored to vector geographic data.By incorporating controllable error digital fingerprints,this method effectively achieves both objectives of geometric accuracy declassification and copyright protection.The experimental results are shown as follows.①The proposed method successfully accomplishes geometric accuracy declassification,resulting in the declassification data that preserves satisfactory graphic shape and spatial relationships with commendable usability.②The copyright protection of declassification data during usage is effectively attained,providing crucial support for the aspiration for"reasonable confidentiality and full use"in the sharing of vector geographic data.

关 键 词：地理信息安全 矢量地理数据 几何脱密 版权保护 数字指纹 

分 类 号：P208[天文地球—地图制图学与地理信息工程]