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Data outsourcing privacy protection method and system and storage medium

A privacy protection and data outsourcing technology, applied in the field of information security technology and location services, can solve the problems of limited operability of ciphertext data, inability to provide support for attribute interval query, retrieval and return, etc.

Pending Publication Date: 2021-03-16
CHONGQING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In some existing studies, LBSP and users encrypt outsourced data and LBS queries respectively, and the operability of ciphertext data is limited, such as cloud servers cannot retrieve and return data that meets user query conditions in ciphertext
In addition, some studies only support geographic scope or interest keyword queries, and cannot provide support for attribute range queries, such as querying points of interest that meet price, rating, and sales within a certain range

Method used

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  • Data outsourcing privacy protection method and system and storage medium
  • Data outsourcing privacy protection method and system and storage medium
  • Data outsourcing privacy protection method and system and storage medium

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Embodiment Construction

[0099] The technical solutions in the embodiments of the present invention will be described clearly and in detail below with reference to the drawings in the embodiments of the present invention. The described embodiments are only some of the embodiments of the invention.

[0100] The technical scheme that the present invention solves the problems of the technologies described above is:

[0101] Attached below figure 1 Describe the framework of the system.

[0102] (1) LBSP end: Responsible for providing location services for authorized users, owning a large number of LBS resources and managing system keys. After the system is initialized, use the key to encrypt your own LBS data set and then upload it to the cloud server to reduce local storage and computing costs.

[0103] (2) Cloud server side: with powerful storage and computing capabilities, it is responsible for storing a large amount of encrypted LBS data from LBSP and providing LBS query services for authorized use...

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PUM

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Abstract

The invention requests to protect a data outsourcing privacy protection method and system and a storage medium, and the method comprises the following steps: in a system initialization stage, a location-based service provider (LBSP) generates a system public parameter and a secret key, and then a new user registers to the LBSP to obtain the secret key to inquire a trap door structure and decrypt data; in the data encryption stage, the LBSP encrypts a location based service (LBS) data set, the LBS data confidentiality is achieved, and ciphertext data is uploaded to a cloud server. In order to protect personal privacy, a user encrypts a query request of the user and sends the query request to a cloud server for query; the cloud server performs matching calculation after receiving the LBS ciphertext data set and the query trap door, and returns ciphertext data conforming to query to the user; and finally, the user decrypts the ciphertext data to obtain actual data. According to the invention, the requirements of user interval query and privacy protection can be well met, the query efficiency is greatly improved, and the query communication overhead is remarkably reduced.

Description

technical field [0001] The invention belongs to the field of information security technology and location service technology, relates to a privacy protection method for LBS data outsourcing, and can be used for user privacy inquiry in data outsourcing. Background technique [0002] With the rapid popularization of location-aware smart terminals and the development of wireless communication networks, location-based services have been widely used. Use the geographic location positioning system in the smart terminal to easily obtain current and accurate geographic location information and obtain corresponding location services, such as: traffic navigation, point of interest query, location sharing, logistics services, etc. In the location-based service, the user first needs to submit his location and query request to the LBSP. After receiving the location information sent by the user, the LBSP processes the user's query request and returns the corresponding query result. With ...

Claims

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Application Information

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IPC IPC(8): G06F21/60G06F21/62
CPCG06F21/602G06F21/6227G06F21/6245
Inventor 周由胜王明
Owner CHONGQING UNIV OF POSTS & TELECOMM
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