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Method for searching dynamic multi-attribute connection keyword based on MAT in cloud environment

A search method and keyword technology, applied in structured data retrieval, special data processing applications, instruments, etc., can solve the problems of ineffective update and low efficiency

Inactive Publication Date: 2018-04-13
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a search method for dynamic multi-attribute connection keywords based on the MAT tree in the cloud environment, to solve the problem that the multi-attribute connection keyword query in the current cloud storage is inefficient and cannot be effectively updated, and to ensure that Under the premise of user privacy and data security, meet the needs of users for fast and dynamic query

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  • Method for searching dynamic multi-attribute connection keyword based on MAT in cloud environment
  • Method for searching dynamic multi-attribute connection keyword based on MAT in cloud environment
  • Method for searching dynamic multi-attribute connection keyword based on MAT in cloud environment

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Embodiment Construction

[0030] The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings.

[0031] As shown in the figure, the search method of the dynamic multi-attribute connection keyword based on the MAT tree in the cloud environment includes the following steps:

[0032] Step 1. The data owner constructs the record set into a MAT-based encrypted index according to a certain security policy, and encrypts the document content corresponding to each record with an existing symmetric encryption algorithm, such as AES, and then encrypts the encrypted index And the encrypted document content is uploaded to the remote cloud server. The specific process is as follows (1)-(4):

[0033] (1) Build an unencrypted MAT-based index (for convenience of description, hereinafter referred to as MAT index).

[0034] ① Determine the number of layers of the MAT tree. In a general MAT structure, the number of layers of the tree is set as...

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Abstract

The invention discloses a method for searching a dynamic multi-attribute connection keyword based on MAT in a cloud environment. The method comprises the following steps that: a data owner constructsdata records into security indexes based on the MAT, encrypts documents corresponding to the data records, and then outsources the encrypted indexes and the encrypted documents to a cloud server; a data user requests search authorization from the data owner; and the data owner decides whether or not to authorize according to an authorization rule. The safe and effective method for realizing inquiry of the dynamic multi-attribute connection keyword on the data records in the cloud environment provided by the invention has the beneficial effects that the security of the privacy and data of a user are ensured; inquiry needed by the user can be satisfied rapidly; and the defect that linear inquiries and databases of most of conventional schemes cannot be updated is overcome.

Description

technical field [0001] The invention belongs to the technical field of searchable encryption in a cloud environment, and in particular relates to a search method for a dynamic multi-attribute connection keyword based on a MAT tree in a cloud environment. Background technique [0002] Cloud computing, as a new computing model after distributed computing and grid computing, can provide powerful data storage, management and computing capabilities. In recent years, with the rapid development of cloud computing, many companies or organizations have begun to outsource data to cloud servers to avoid cumbersome local data management and obtain more convenient services. However, cloud servers are maintained and managed by third-party Internet commercial companies (such as Amazon, Google, etc.), and usually do not belong to the same trust domain as users. Therefore, in order to protect data security and user privacy, users generally encrypt data and then store it in cloud servers. Al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30G06F21/60
CPCG06F16/2228G06F16/243G06F16/25G06F21/602
Inventor 张丽丽张志勇李玉祥牛丹梅赵长伟向菲靳正芬乔阔远
Owner HENAN UNIV OF SCI & TECH
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