Commutative encryption and watermarking method based on chaotic system and zero watermark for vector geospatial data
US12158928B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 2024 |
| Grant date | Dec 3, 2024 |
| Priority date | — |
| Expiry date | Jun 14, 2044 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D30/50
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.