Multi-keyword searchable encryption method based on block chain

A technology with multiple keywords and encryption methods, applied in the field of blockchain, can solve the problems of single node of cloud server and insufficient degree of decentralization, and achieve the effect of improving retrieval efficiency, ensuring transaction fairness, and preventing malicious behavior.

Pending Publication Date: 2022-07-12
SHIJIAZHUANG TIEDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In the existing solutions, the verification mechanism established through the blockchain guarantees transaction fairness to a certain extent, but in these solutions, the cloud server is still a logical single node, and the degree of decentralization is not high enough

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  • Multi-keyword searchable encryption method based on block chain
  • Multi-keyword searchable encryption method based on block chain
  • Multi-keyword searchable encryption method based on block chain

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Embodiment Construction

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] Many specific details are set forth in the following description to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can do so without departing from the connotation of the present invention. Similar promotion, therefore, the present invention is not limited by the specific embodiments dis...

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Abstract

The invention discloses a multi-keyword searchable encryption method based on a block chain. The multi-keyword searchable encryption method comprises the following steps of performing initialization; constructing an index; generating a trap door; performing distribution; performing retrieval; performing verification; performing decryption; and arbitration. According to the method, the retrieval task is decomposed by using a distribution algorithm and then is operated by a plurality of search servers, so that the dependence on a single cloud server is reduced, and the decentralization degree is higher. According to the method, malicious behaviors of the cloud server are detected by utilizing an arbitration algorithm and a verification algorithm, and a retrieval result is verified, so that fair transaction between a user and the cloud server is ensured. A keyword weight mechanism is designed in a retrieval algorithm, and a fuzzy result can be provided based on weight when a retrieval result is empty. Experimental analysis and comparison show that the method has high execution efficiency.

Description

technical field [0001] The invention relates to the technical field of blockchain, in particular to a multi-keyword searchable encryption method based on blockchain. Background technique [0002] Cloud computing has been booming in recent years, and a large number of companies have begun to provide cloud services to the society. Cloud service categories include platform-as-a-service, infrastructure-as-a-service, and software-as-a-service. Users can choose to buy or rent different cloud services according to their own needs. More and more organizations are also moving data and applications to cloud servers. [0003] While cloud services bring more convenience, the risks of security and privacy leakage cannot be ignored. The most commonly used by individual users is to rent cloud storage servers to store personal data. For example, Apple's iCloud. Users can store photos, videos and other types of files on their phones in the iCloud cloud server. This saves local storage ...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G06F21/60H04L9/08G06F16/13G06F16/14
CPCG06F21/602H04L9/085G06F16/13G06F16/148
Inventor郑丽娟吴朋钢赵美茹吕亚奇宫天封柔昕杨含玉赵博远
OwnerSHIJIAZHUANG TIEDAO UNIV