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Method for searching multi-domain connection keywords on basis of MDB+ tree under cloud environment

A search method and cloud environment technology, applied in the fields of instruments, electrical digital data processing, digital data protection, etc., can solve the problems of time-consuming operation, low search efficiency, etc.

Active Publication Date: 2017-07-25
HENAN UNIV OF SCI & TECH
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  • Description
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AI Technical Summary

Problems solved by technology

However, their search efficiency is lower compared to SKC-based SE mechanisms
Because the PKC-based SE mechanism generally needs to generate many time-consuming pair operations

Method used

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  • Method for searching multi-domain connection keywords on basis of MDB+ tree under cloud environment

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Embodiment Construction

[0029] As shown in the figure, in the cloud environment based on MDB + A search method for a multi-domain connection keyword of a tree, comprising the following steps:

[0030] Step 1. The data owner constructs each data record based on the MDB + The security index of the tree, and encrypt the documents corresponding to each data record, and then outsource the encrypted index and encrypted documents to the cloud server. The specific method is as follows:

[0031] (1) In the initialization phase, the data owner sets the attributes of the data record A={A 1 ,A 2 ,…,A m } be divided into h group, namely A ’ = {A 1 ’ ,A 2 ’ ,…,A h ’ } ,in m is the number of attributes, h for MDB + The maximum level of the tree, and then randomly generate a V i binary vector of bits S i with one V i ×V i The invertible matrix of {M 1,i , M 2,i } ,in V i is corresponding to the MDB + tree number i layer vector length, private key SK i for triplets {S i...

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Abstract

The invention discloses a method for searching multi-domain connection keywords on basis of an MDB+ tree under cloud environment. The method comprises the following steps of: constructing each data record into a MDB+ tree-based safety index by a data owner; encrypting a document corresponding to each data record; outsourcing the encrypted indexes and encrypted documents to a cloud server; requesting search authorization from the data owner by a data user; deciding whether to carry out authorization by the data owner according to an authorization rule; if the user obtains authorization, distributing a search trap door and a decryption secret key to the data user by the data owner; submitting the search trap door to the cloud server by the data user; and when the cloud server receives the search trap door submitted by the user, searching the MDB+ tree by utilizing a matching algorithm so as to obtain all the records matched with a user query requirement. The method has the beneficial effects of ensuring the user privacy and data safety, rapidly satisfying the query required by the user, and overcoming the defects of linear query of the past vast majority of schemes.

Description

technical field [0001] The invention belongs to the technical field of cloud storage encrypted search, and specifically relates to an MDB-based + A search method for multi-domain join keywords in a tree. Background technique [0002] With the rapid development of information technology, cloud computing has attracted more and more attention. Although cloud computing can provide powerful storage and computing capabilities, outsourced servers such as cloud computing are maintained and managed by third-party Internet commercial companies (such as Amazon, Google, etc.). Many companies and organizations are cautious about cloud computing. It is they who are concerned about the security of their data and the privacy of their users. [0003] In recent years, with the continuous development of medical informatization, the number of Electric Medical Records (EMRs for short) is increasing. How to effectively store and manage the increasing EMRs is a problem faced by many hospitals an...

Claims

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Application Information

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IPC IPC(8): G06F21/62H04L29/06
CPCG06F21/6263H04L63/0428
Inventor 张丽丽张志勇牛丹梅向菲赵长伟王斐马华红黄涛
Owner HENAN UNIV OF SCI & TECH
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