Research On Zero-Watermarking Algorithm For Data Cube

Data cube is a principal means of multidimensional data modeling. As its wider applications, how to prevent unauthorized proliferation of the data sets modeled by data cube has became a hot area in data security researches.Based on the researches of digital watermarking scheme, this paper designed a zero-watermarking scheme for data cube copyrights protection. The main works and achievements are mainly showed in the following aspects:(1) Based on the research and analysis of existed digital watermarking technologies for data cube, this paper summed up the general principles of most used schemes, and analyzed the essence of these theories.(2) Constructed a zero-watermarking scheme for data cube, and designed a model of this scheme which is mainly composed of zero-watermarking construction and detection.(3) In the watermarking construction phase, the process was divided into three stages:feature extraction, copyrights information pre-processing and data fusion.In the detection phase, the process was also divided into three stages:feature reconstruction, data separation and inverse operation of copyrights information pre-processing. Then an algorithm of watermarking construction and detection scheme could be designed and analyzed in the theoretical point of view.(4) The simulation experiment was designed to test the availability and anti-aggressive capability of the scheme. Results showed that the scheme had good performance on availability and anti-aggressive capability.