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Method and system for guaranteeing encryption retrieval completeness of searchable public key

A public key encryption and complete technology, applied in the field of encryption, can solve problems such as lack of versatility, combination of encryption and blockchain technology

Active Publication Date: 2021-06-22
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the patent does not combine encryption with blockchain technology, so the technology is not universal

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  • Method and system for guaranteeing encryption retrieval completeness of searchable public key
  • Method and system for guaranteeing encryption retrieval completeness of searchable public key

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Embodiment Construction

[0044] A detailed description will be given below in conjunction with the accompanying drawings.

[0045] The invention provides a method and system for ensuring the completeness of searchable public key encryption retrieval. The present invention can also be called a security guarantee system and method based on searchable public key encryption retrieval completeness.

[0046] Completeness means that the search results returned by the server to the user are all ciphertexts sent from the sender to the receiver, which are the same as the keywords contained in the search trapdoor. There are no redundant results and no omissions, referred to as search completeness .

[0047] The system for ensuring the completeness of searchable public key encryption retrieval in the present invention is as follows: figure 1 shown. The system for ensuring completeness of searchable public key encryption retrieval includes at least a processor and a computer readable medium. Computer readable ...

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Abstract

The invention relates to a method and system for guaranteeing the encryption retrieval completeness of a searchable public key, a block chain network is formed by a plurality of computer nodes, and the method at least comprises the steps that the block chain network receives a keyword ciphertext generated by a sending end based on public key encryption and a corresponding file identification ciphertext, at least one miner stores the ciphertext in a ciphertext table, and the block chain network receives a retrieval trap door Tw which is sent by the receiving end and is generated based on a private key and a keyword w to be retrieved; at least one miner in the block chain network executes retrieval based on the retrieval trap door Tw and the information of the state table, and outputs a retrieval result to the block chain network; and the block chain network feeds back the retrieval result to the receiving end. According to the method, the problem of retrieval completeness existing in searchable public key encryption for a long time is solved by utilizing a block chain technology, and the proposed method has universality.

Description

technical field [0001] The invention relates to the field of encryption technology, in particular to a method and system for ensuring the completeness of searchable public key encryption retrieval. Background technique [0002] At present, with the development of the cloud computing industry, data outsourcing storage and sharing technology has made great progress. The outsourced storage and sharing of data on the cloud platform has been widely recognized and accepted by people because of its convenience and efficiency. For users who need outsourced storage and sharing of important or confidential data, such as business users of the cloud email platform, they will first encrypt the data before uploading it to the cloud platform. However, the server cannot perform operations on encrypted data, so when users share encrypted data, the recipient of the data cannot retrieve the data, so as to quickly select and obtain the required data. [0003] To solve this problem, searchable...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04L29/08H04L9/30H04L9/08
CPCH04L63/0428H04L9/0861H04L9/30H04L67/10H04L67/1097H04L9/50H04L9/0618
Inventor 徐鹏陈天阳郑宇博金海王蔚
Owner HUAZHONG UNIV OF SCI & TECH