Point type GIS vector data disguise and recovery method based on redundant bit replacement

Abstract

The invention discloses a point type GIS (Geographic Information System) vector data disguise and recovery method based on redundant bit replacement, belonging to the field of geographic information security. The method comprises the following data disguise processing steps of: converting a coordinate value of a to-be-disguised layer, and dividing the coordinate value into a plurality of groups according to data feature and accuracy requirement of a carrier layer; setting a key, and generating a random sequence based on the key, and sorting; hiding the converted point coordinate in corresponding position of the carrier layer based on the generated sequence. After being disguised by the method of the invention, a secret information carrying layer visually seems to have no change, so that attackers are hard to discover the secret information in the secret information carrying layer, the secret data is disguised well, even the attackers know that the layer is the secret information carrying layer, the attackers are also hard to extract the secret data due to the introduction of the key. The method of the invention can be successfully used in disguise and recovery of point type vector data, and meets the requirements on hidden communication and secure transmission of the GIS vector data to a certain degree.

Description

technical field [0001] The invention belongs to the field of geographic information security, and in particular relates to a point type GIS vector data camouflage and restoration algorithm based on redundant bit replacement. Background technique [0002] The security protection of geographic information involves national security and social interests, and is a major national and social demand that needs to be urgently addressed. As the main data content of the National Spatial Data Infrastructure, GIS vector data, its information security research is even more important. [0003] At present, information camouflage has become another important branch besides cryptography in information security research. The analysis of relevant research literature and patent retrieval results at home and abroad shows that at present, in the research of information camouflage, the carrier data types mainly include images, videos, remote sensing images, DEM and so on. However, vector data ha...

AI Technical Summary

Problems solved by technology

However, vector data has many characteristics such as data organization without fixed storage order, various data formats, powerful visual expression means, complex projection transformation, various spatial analysis applications, high precision and less redundancy. It makes the information camouflage research on vector data have certain particularity and great difficulty

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