The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 03, 2024
Filed:
Jun. 14, 2024
Lanzhou Jiaotong University, Lanzhou, CN;
Haowen Yan, Lanzhou, CN;
Liming Zhang, Lanzhou, CN;
Jingzhong Li, Lanzhou, CN;
Shuwen Yang, Lanzhou, CN;
Tao Tan, Lanzhou, CN;
Zufeng Li, Lanzhou, CN;
Xiaomin Lu, Lanzhou, CN;
Weifang Yang, Lanzhou, CN;
LANZHOU JIAOTONG UNIVERSITY, Lanzhou, CN;
Abstract
Disclosed in the present disclosure is a commutative encryption and watermarking method based on a chaotic system and a zero watermark for vector geospatial data. According to the method, firstly, the vector geospatial data are scrambled and encrypted by using chaotic sequences generated by a composite chaotic system. Then, vector geospatial elements are randomly combined in pairs. A feature matrix is constructed according to the number of vertex coordinates of the vector geospatial elements in combinations, and the parity of the number. Finally, an XOR operation is performed on the feature matrix and the watermark image to construct a zero watermark image, and the zero watermark is constructed through invariant features of the vector geospatial data.