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Location privacy protection anonymous query method based on SF-blind filtering protocol

A technology of privacy protection and query methods, applied in the fields of digital data protection, computer security devices, instruments, etc., can solve the problem of not taking user security into consideration, and achieve the effect of reducing communication consumption, realizing fine-grained access control, and strengthening filtering. Effect

Inactive Publication Date: 2021-10-01
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing research generally uses semi-trusted agents to handle computational tasks that are too stressful for the client, but these studies do not consider the user's privacy (key-related) security for these agents

Method used

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  • Location privacy protection anonymous query method based on SF-blind filtering protocol
  • Location privacy protection anonymous query method based on SF-blind filtering protocol

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Embodiment Construction

[0046] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.

[0047] The present invention is an anonymous query method based on the location privacy protection of the SF-blind filtering protocol. The user judges whether the returned point of interest is within the user's query range through an agent, and neither the agent nor the service provider can grasp it during the entire query process. Valuable information such as the user's location and query results. At the same time, by introducing the symbolic function, a judgment condition about the range of the location query is designed in the blind filtering protocol, and the ciphertext information of the symbolic function is established, and then the decryption is completed through the key information specified by the corresponding access control tree, matching the legitimate user Precise demand for location-based services.

[0048] First introduce the req...

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Abstract

The invention discloses a location privacy protection anonymous query method based on an SF-blind filtering protocol. The method comprises the following steps: during LBS query, generating a data file tag through methods such as a Bloom filter and the like, and hiding sensitive information including identity and position of an LBS user for an LBSP; and hiding, by the LBSP, the returned result from the agent through a blind filtering method based on the SF, wherein each POI of the LBS user is stored in the LBSP; when the POI is returned as one of the results of a certain query, encryption is carried out through a session key, the LBSP calculates parameters related to the position of the POI at the same time to serve as input of blind filtering, and in a blind filtering protocol, SF is generated and a public key of the LBSP is used for encrypting and adding into response of the LBSP; thereby, only the private key of the LBS user whose attribute satisfies the access tree can decrypt and obtain the SF, and the accurate demand of the legal user for the location service is matched.

Description

technical field [0001] The invention belongs to the technical field of information security, and in particular relates to an anonymous query method for location privacy protection based on the SF (Symbolic Function, symbolic function)-blind filtering protocol. Background technique [0002] In recent years, with the popularization of mobile devices and the development of wireless network technology, LBS (Location Based Service, location-based service) has become popular. Therefore, many LBS (Location Based Service, location-based service) applications quickly penetrate into people's lives, and efficient location services bring a new experience to users. In applications based on LBSP (Location Based Service Provider, location service provider), service providers provide users with services such as travel, emergency rescue, advertising promotion, sports and health by accepting users' requests including their own location. However, since LBS queries usually contain information ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F16/9537G06F21/62
CPCG06F16/9537G06F21/6245
Inventor 王鑫杨博雷涛陶筱娇
Owner SHAANXI UNIV OF SCI & TECH
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