Data query method and device based on searchable encryption technology

A data query and data technology, applied in digital data protection, electronic digital data processing, computer security devices, etc., can solve the problems of low query efficiency, difficulty, and inaccurate query, so as to improve data security and solve misjudgment Problems, effects of data leakage prevention

Active Publication Date: 2021-09-24
ALIPAY (HANGZHOU) INFORMATION TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In related technologies, in order to avoid data leakage, ciphertext data can be stored in the database, and the query of ciphertext data is more difficult than that of plaintext data, especially when there are a large number of ciphertext data stored in the database. When using text data, there will be problems of low query efficiency and inaccurate query

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  • Data query method and device based on searchable encryption technology
  • Data query method and device based on searchable encryption technology
  • Data query method and device based on searchable encryption technology

Examples

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Embodiment Construction

[0033] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with this specification. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present specification as recited in the appended claims.

[0034] The terms used in this specification are for the purpose of describing particular embodiments only, and are not intended to limit the specification. As used in this specification and the appended claims, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the t...

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Abstract

The invention discloses a data query method and device based on a searchable encryption technology. According to the data query method based on the searchable encryption technology, a ciphertext database is configured in advance, ciphertext data obtained by encrypting plaintext data based on the searchable encryption technology and data tokens of the plaintext data corresponding to the ciphertext data are stored in the ciphertext database, and the data query method comprises the steps of receiving a query request initiated by a user, the query request carries a query condition; performing searchable encryption on the query condition to obtain a ciphertext query condition, and generating a query token of the query condition; searching a plurality of candidate ciphertext data from a ciphertext database based on the ciphertext query condition; for each candidate ciphertext data, based on the data token of the plaintext data corresponding to the candidate ciphertext data and the query token of the query condition, verifying whether the candidate ciphertext data are matched with the query condition; and decrypting the candidate ciphertext data matched with the query condition to obtain target plaintext data, and providing the target plaintext data to the user.

Description

technical field [0001] This description relates to the field of data encryption, in particular to a data query method and device based on searchable encryption technology. Background technique [0002] In the scenario of data sharing, the data for sharing can be stored in a database, and all parties can query the database to obtain the required data to achieve the purpose of sharing. In this scenario, data security has always been the focus of attention. In related technologies, in order to avoid data leakage, ciphertext data can be stored in the database, and the query of ciphertext data is more difficult than that of plaintext data, especially when there are a large number of ciphertext data stored in the database. When using text data, there will be problems of low query efficiency and inaccurate query. Contents of the invention [0003] In view of this, this specification provides a data query method and device based on searchable encryption technology. [0004] Spe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F16/2455G06F21/60G06F21/62
CPCG06F16/2455G06F21/602G06F21/6218
Inventor 郑金伟林立张凯隆
Owner ALIPAY (HANGZHOU) INFORMATION TECH CO LTD
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