Ciphertext retrieval fair payment method and system based on block chain

A payment system and block chain technology, which is applied in the field of block chain-based ciphertext retrieval fair payment method and system, can solve problems that do not support multi-keyword search, top-k sorting and public verifiability, data owner, Issues such as leakage of user privacy by a trusted third party, lack of ability to verify the correctness of search results, etc., to achieve the effects of flexible system expansion, secure ciphertext retrieval mechanism, and efficient and fair payment retrieval

Active Publication Date: 2019-12-20
FUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are certain limitations in relying on trusted third-party payment methods: a fully trusted party (such as a bank) needs to be introduced to handle payment issues fairly; trusted third parties may not have the ability to verify the correctness of search results or other outsourced computing operations ; The privacy of data owners and users may be leaked by a trusted third party
[0005] The current blockchain-based searchable encryption schemes use the built-in payment function of the blockchain to achieve fair payment. However, these schemes do not support multi-keyword search, top-k sorting, and publicly verifiable functions. Therefore, These solutions are not practical

Method used

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  • Ciphertext retrieval fair payment method and system based on block chain
  • Ciphertext retrieval fair payment method and system based on block chain
  • Ciphertext retrieval fair payment method and system based on block chain

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Embodiment Construction

[0044] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0045] It should be pointed out that the following detailed description is exemplary and is intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0046] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combina...

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Abstract

The invention relates to a ciphertext retrieval fair payment method and system based on a block chain. The system comprises a data owner, a data user, a cloud platform and an intelligent contract deployed on the block chain. The encrypted data of the data owner is authorized to more than one data user for retrieval and decryption through the smart contract; the data user can initiate a search request when an authorization condition is met and enough search cost is stored in the smart contract; and the smart contract verifies the correctness and integrity of the search results returned by the cloud server, and after the verification is passed, the cloud server returns k search results with the highest relevancy to the data user. The problem of fair payment can be further solved.

Description

technical field [0001] The invention relates to the technical field of searchable encryption and fair payment, in particular to a blockchain-based ciphertext retrieval fair payment method and system. Background technique [0002] With the development of cloud computing, more and more enterprises and individuals take advantage of this emerging technology to migrate a large amount of data and computing tasks to the cloud platform to save local storage and computing resources. While the cloud platform provides users with remote storage and computing services, the privacy issues of user data have gradually emerged. The cloud platform can access and use user data at any time without restriction. In order to guarantee security while ensuring data availability in the cloud platform, searchable encryption technology has become a research hotspot in cloud computing, which can simultaneously achieve the purpose of data confidentiality and information retrieval. However, most of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q20/12G06Q20/36G06Q20/38G06Q20/40G06F16/9535G06F21/30G06F21/60
CPCG06Q20/123G06Q20/36G06Q20/3829G06Q20/4014G06F16/9535G06F21/30G06F21/602G06F2221/2107
Inventor 杨旸林鸿瑞郭文忠刘西蒙郑相涵邹剑
Owner FUZHOU UNIV
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