Data privacy protection method based on dynamic context

A data privacy and context technology, applied in the fields of digital data protection, electronic digital data processing, instruments, etc., can solve the problems of the complexity of response time, access intent, rigid and inflexible privacy protection, ignoring changes in user attributes, etc., to achieve data utilization. High efficiency, efficient real-time matching and verification, and the effect of privacy leakage prevention

Active Publication Date: 2019-03-01
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0005] However, in the actual operation process, the existing data privacy protection technology has the following problems: the prevention of reasoning attacks in the rule making module focuses on the top-level design, relies on the theoretical analysis of reasoning closures, and ignores the dynamic attribute changes of users in process attacks ; while the response tim

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  • Data privacy protection method based on dynamic context
  • Data privacy protection method based on dynamic context
  • Data privacy protection method based on dynamic context

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Embodiment Construction

[0026] Such as figure 1 As shown, the data privacy protection method based on dynamic context of the present invention comprises the following steps:

[0027] (10) Semantic coding: use the XML document semantic coding scheme to store and code the source data objects; and provide users with personalized PBG (Privacy Bipartite Graph, privacy bipartite graph) and KC (Knowledge Context, dynamic knowledge context);

[0028] Such as figure 2 Shown, described (10) semantic coding step comprises:

[0029] (11) XML document semantic coding: use the new location tree-binary tree coding and document semantic coding to store DTD and XML documents;

[0030] (12) Privacy bipartite graph division: divide the privacy bipartite graph according to condition sensitivity, and store sensitive and incompatible privacy paths according to XML document semantic coding;

[0031] (13) Provide dynamic background knowledge: provide existing dynamic background knowledge based on different states of us...

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Abstract

The invention discloses a data privacy protection method based on dynamic context, which is characterized in that the method comprises the following steps: (10) semantic coding: storing and coding thesource data object by adopting an XML document semantic coding scheme; the user's personal bipartite privacy graph and dynamic knowledge context are provided according to the encoding scheme. (20) user login: obtaining the visual range of the user and obtaining the dynamic knowledge context; 30) access operation, wherein that query is taken as a basic operation, the path of the visible range is locate, and the access operation result is determined accord to the matching judgment of the bipartite graph of privacy; (40) dynamic knowledge context updating: updating the dynamic knowledge contextaccording to the superposition of user query operations and the accumulation of acquired prior knowledge. The data privacy protection method of the invention has the advantages of high information security, high data utilization efficiency and good real-time resistance to inference attack.

Description

technical field [0001] The invention belongs to the technical field of real-time network anti-reasoning attack privacy protection, and is a dynamic context-based data privacy protection method with high information security, high data utilization efficiency, and good real-time anti-inference attack performance. Background technique [0002] Data access privacy protection usually uses methods such as attribute encryption, access control, restricted release, and differential privacy protection to prevent user privacy from being illegally stolen or reasoned. [0003] As the commonly used "fuzzification" in data publishing is more and more likely to be restored to individuals in connection reasoning attacks, the role of fuzzing in data publishing as a means of protecting personal privacy is becoming weaker; and the preprocessing of global reasoning is also The efficiency becomes a bottleneck in practical applications and cannot meet the needs of user privacy protection; differen...

Claims

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Application Information

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IPC IPC(8): G06F21/60
CPCG06F21/604
Inventor 王梅娟王箭夏正友朱友文薛明富李阳李兴鑫
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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