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Repeated, casual and anti-link query method and system for secret state data

A technology for encrypting data and data, which is applied in the fields of cloud services, encrypted data query, and privacy protection. It can solve problems such as weak data and serious data security issues, and achieve low computing costs, low overhead communication, and reduced query response time.

Pending Publication Date: 2022-06-07
HEFEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In addition, in the past ten years, there have been many reports of data leakage incidents caused by network attacks, hardware failures or misoperations. At the same time, many companies still have relatively weak awareness of protecting data stored on service providers, making data security problems increasingly serious

Method used

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  • Repeated, casual and anti-link query method and system for secret state data
  • Repeated, casual and anti-link query method and system for secret state data
  • Repeated, casual and anti-link query method and system for secret state data

Examples

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Embodiment Construction

[0050] In this embodiment, a typical secure K nearest neighbor query processing is as follows figure 1 As shown, the data upload module encrypts the data and calculates the security index and uploads it to the data cloud storage module, and the data request module sends a secure K nearest neighbor query to the data cloud storage module and obtains the returned result;

[0051] In this embodiment, a method and system for repetitive, inadvertent and anti-linking query oriented to secret state data, such as figure 2 As shown, it includes multiple data upload modules, multiple data request modules and a data cloud storage module;

[0052] Taking the repeated query processing of dense data on the cloud in the service of searching for a nearby pizza shop as an example, the data upload module is for the pizza shop that provides dining services, and the data request module is for the guests who need to use the pizza shop service that has been queried and experienced before. , The da...

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Abstract

The invention discloses a repeated, casual and anti-link query method and system for encrypted data. The method and system are applied to an environment formed by a plurality of data uploading modules, a plurality of data request modules and a data cloud storage module. The data uploading module calculates a data security index with limited access time, uploads the data security index and encrypted data to the data cloud storage module and shares a secret key with some data request modules; the data request module generates a query token according to the access time, submits the token to the data cloud storage module, decrypts the matched data and verifies the authenticity after the data is sent back, otherwise, waits for valid data all the time; and the data cloud storage module receives the security index and the encrypted data from the data uploading module, receives the token from the data request module, searches the security index by using the token, and returns k recent query results and evidences. According to the method, data items from the cloud can be repeatedly matched in an oblivious and anti-link mode, and collusion attacks between the cloud and a data owner can be resisted.

Description

technical field [0001] The invention can realize a repeated, inadvertent and anti-linking query method and system for secret state data, and belongs to the technical fields of privacy protection, cloud service and encrypted data query. Background technique [0002] Smartphones are now equipped with Global Positioning System (GPS) modules and various location-based services (LBS) enabled applications. It works by sending the data user's current location query to the service provider. The service provider matches the query with the data owner's data items and retrieves the corresponding results from the data user. For example, Google Maps allows data users to find Starbucks, bars and restaurants near their current location. [0003] While LBS offers practical benefits, privacy concerns arising from location revealing and untrusted service providers are major barriers to widespread adoption of LBS. First, the submitted location information may include the user's sensitive lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/60G06F16/951G06F16/953
CPCG06F21/602G06F16/951G06F16/953
Inventor 李萌张明威
Owner HEFEI UNIV OF TECH
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