Encrypted cloud data-oriented multi-keyword matching sorting search method for cloud network

A technology of keyword matching and search methods, which is applied in the field of multi-keyword matching, sorting and searching for encrypted cloud data, and can solve problems such as huge computing overhead

Inactive Publication Date: 2018-09-21
ZHEJIANG SCI-TECH UNIV
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Problems solved by technology

However, as the number of words extracted from documents increases, phrase queries will cause huge computational overhead, and grow linearly with the number of words

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  • Encrypted cloud data-oriented multi-keyword matching sorting search method for cloud network
  • Encrypted cloud data-oriented multi-keyword matching sorting search method for cloud network
  • Encrypted cloud data-oriented multi-keyword matching sorting search method for cloud network

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Embodiment Construction

[0046] The present invention will be described in detail below according to the accompanying drawings and preferred embodiments, and the purpose and effect of the present invention will become 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.

[0047] A multi-keyword matching and sorting search method for encrypted cloud data in a cloud network, comprising the following steps:

[0048] 1. Create index vectors for 10,000 documents

[0049] (1.1) Let the set of keywords extracted from the i-th document be g i , the set composed of keyword sets of all documents is recorded as G, the set composed of all non-repeating elements in G is recorded as dictionary set D, and d j For the jth keyword dictionary in the dictionary set D, calculate g i ∩...

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Abstract

The invention discloses an encrypted cloud data-oriented multi-keyword matching sorting search method for a cloud network. According to the method, an index is established in a multi-keyword form, sothat multiple keywords extracted from a document are mapped to one dimension of the index through a comprehensive scoring algorithm; meanwhile, a score matching algorithm is adopted in a search process; and the score matching algorithm is combined with the comprehensive scoring algorithm, so that search results can be sorted according to matching types and the quantity of matching keywords. Therefore, the method reduces the index storage overhead and is high in sorting precision and high in encryption and search efficiency.

Description

technical field [0001] The invention relates to the field of sorting and retrieving encrypted data in a cloud network, in particular to a multi-keyword matching, sorting and searching method for encrypted cloud data in a cloud network. Background technique [0002] In order to save local storage costs, more and more people choose to store private data in untrusted remote servers. However, there are potential risks in the cloud storage environment. In recent years, data leakage incidents have occurred frequently. In order to use convenient cloud services, many people have to encrypt their private data and upload it to the cloud. Although encryption increases the difficulty of data utilization, it can protect the security of private data. In an untrusted cloud environment, many scholars have proposed their own solutions to different cloud storage service problems. Their work focused on designing a searchable, encrypted index that hides information about documents from server...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
Inventor 刘良桂孙辉贾会玲张宇
Owner ZHEJIANG SCI-TECH UNIV
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