Complex transformation hiding and restoring method for spatial abnormal information

The invention discloses a complex transformation hiding and restoring method for spatial abnormal information. The method is characterized by comprising the following steps of 1) calculating local densities and distance dissimilarity degree of spatial data objects; 2) solving abnormal degree coefficients of the spatial data objects; 3) selecting the abnormal data objects according to Top-N; 4) establishing complex data and complex factors, and performing complex transformation hiding; 5) sending a complex transformation set and a complex factor data set; 6) selecting a two-dimensional value of abnormal information; and 7) performing inverse transformation. The method is an innovative method for abnormal information privacy protection; and the method can simplify the abnormal information processing process, reduce the data processing amount, ensure data information and parameters sent by a data sender to be least, ensure the security of local abnormal data in information sharing and transmission processes and