An Encryption Method Based on Features of Geographical Information Products

A technology of information products and encryption methods, applied in encryption devices with shift registers/memory, secure communication devices, digital transmission systems, etc., can solve the problem of increasing the risk of cracking encryption schemes in chaotic systems and decreasing the randomness of key streams , reduce the security of the encryption scheme of the chaotic system, and achieve the effects of good pseudo-randomness, long cycle, and improved security

Active Publication Date: 2017-11-28
HARBIN ENG UNIV
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Problems solved by technology

[0003] According to the research objectives and research content of this topic, by comparing the solutions of geographic information data encryption at home and abroad, and fully analyzing the traditional chaotic system encryption scheme, it is found that the traditional chaotic system encryption scheme has the following shortcomings: First, the use of a single key information pair Encryption of too long plaintext will reduce the randomness of the key stream, which will reduce the security of the encryption scheme of the chaotic system; Obtaining a large number of corresponding plaintext and ciphertext pairs will increase the risk of the encryption scheme of the chaotic system being cracked

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  • An Encryption Method Based on Features of Geographical Information Products
  • An Encryption Method Based on Features of Geographical Information Products
  • An Encryption Method Based on Features of Geographical Information Products

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Embodiment Construction

[0039] The present invention will be further described below in conjunction with the accompanying drawings.

[0040] According to different data types of geographic information products, the invention analyzes the features of spatial data, attribute data and image data of geographic information products. Combining the characteristics of spatial data, using non-deterministic mathematical models and nonlinear transformation technology, the feature encryption scheme based on spatial data characteristics is studied; combining the characteristics of attribute data, using chaos theory, coding technology and permutation technology, design and realize permutation encryption and streaming Encrypt two encryption schemes; combined with the characteristics of image data, based on the encryption method of feature data, an encryption scheme for image data stream is designed and implemented.

[0041] Geographic information data has the characteristics of large data volume, batch processing a...

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Abstract

The invention relates to fields of cryptology, chaos theories, information safety, geographic information systems and digital image processing, in particular to a method for encrypting digital vector maps. The method includes: determining data part required to be encrypted according to the features of different data; starting a chaos system A, a chaos system B and a selecting function; synchronizing after the chaos system A and the chaos system B respectively reach the chaos state; using the selecting function to select the chaos sequence number generated by the chaos system A and the chaos system B. The method has the advantages that geographic information file data structures are unchanged during encryption through a feature data encryption algorithm, the encrypted files can be opened by related software while data has not actual significance, and the problem that the graphic information files encrypted by traditional encryption algorithms cannot be opened by related software is solved.

Description

technical field [0001] The invention relates to the fields of cryptography, chaos theory, information security, geographic information system and digital image processing, and is a method for encrypting digital vector maps. Background technique [0002] In recent years, Geographic Information System (GIS) is rapidly moving from theoretical research to practical and industrialization, and has been widely used in many fields. Geographic information system is a computer information system specially used to manage geographically distributed data, which has multiple capabilities of collecting, storing, managing, analyzing and outputting geographic information. Digital vector map is an indispensable part of GIS. It has many advantages such as high precision, high-quality zoom support, accurate positioning, convenient operation, and convenient update. It has become a geographical information system, intelligent transportation system, digital city and digital It is a necessary supp...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/00H04L9/06
Inventor 门朝光田泽宇魏宇峰王一超
Owner HARBIN ENG UNIV
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