Method of and apparatus for encrypting digital map

An electronic map and watermark encryption technology, applied in the field of information security, can solve the problem of insufficient copyright protection of electronic maps, and achieve the effect of improving copyright protection and improving efficiency.

Active Publication Date: 2007-03-07
北京百度智图科技有限公司
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for encrypting electronic maps, aiming to solve the problem of insufficient copyright protection of electronic maps in the prior art

Method used

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  • Method of and apparatus for encrypting digital map

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Embodiment Construction

[0023] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0024] The present invention extracts feature information from the electronic map, adds note information at relevant positions, and combines the two to generate watermark information with certain robustness to encrypt the electronic map. The watermark information can be used for extraction during copyright verification. Thus constitutes a strong protection for the copyright of the electronic map.

[0025] FIG. 1 shows the internal structure of the watermark encryption tool for encrypting electronic maps in the present invention, including a feature information extraction module 100 , a feature info...

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Abstract

This invention provides one pair of electron map coding method and device in information safety field, which comprises the following steps: a, catching characteristic information from map; b, adding extra information at relative position of the said electron map and establishing the said information and the characteristic information; c, integrating the above information into watermark information for storage. This invention generates watermark information to code the electron map.

Description

technical field [0001] The invention relates to the field of information security, more specifically, to a method and device for encrypting an electronic map. Background technique [0002] At present, the copyright protection of the electronic map has become an urgent problem to be solved, so the electronic map needs to be encrypted. [0003] At present, the technology of electronic map encryption is not very mature. The encryption method currently known in the field is to transform the coordinates of the electronic map, which is actually to deform the map coordinates. Such an electronic map needs to provide a software decryption plug-in to the user at the same time, and the electronic map can only be used after coordinate inverse transformation is performed. For details, please refer to the encryption method of the navigation electronic map by the State Bureau of Surveying and Mapping. [0004] The disadvantage of this prior art is that the encrypted electronic map data i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/00G06T1/20G06F21/16
Inventor 李庆建
Owner 北京百度智图科技有限公司
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