A location-based privacy-preserving query processing method for mobile cloud platforms

Abstract

The invention discloses a location-based privacy protection query processing method for a mobile cloud platform, which sequentially includes the following steps: system initialization, data master location encryption, user key generation, user key verification, user location encryption, distance calculation, and distance comparison and query results. The processing flow based on the location query in the present invention can handle the distance calculation and distance comparison operation requests by the mobile cloud service provider without exposing the location information of the data owner and data user, obtain the ciphertext result, and then send it to Data users, finally, only legitimate data users can obtain plaintext results. In the process, the present invention makes full use of cloud computing resources, and data users only need to spend very little computing cost to obtain services.

Description

technical field [0001] The invention relates to a privacy protection processing technology based on a location query in a mobile cloud platform, in particular to a location-oriented privacy protection query processing method for a mobile cloud platform. Background technique [0002] With the rapid development of social networks and smart phone-side mobile cloud, more and more users use smart phones to record their lives and save these recorded data to the mobile cloud. It is worth noting here that these recorded data are often embedded with location information, because smartphones have a built-in GPS module that has a very powerful ability to obtain location information. Such as the camera function of a smartphone. Therefore, with the widespread use of the mobile cloud, a large amount of data with built-in location information is collected in the cloud, which brings a rich basic database for location-based query services and brings convenience to people's lives. However, ...

AI Technical Summary

Problems solved by technology

Because the communication tool commonly used by mobile cloud users is mobile phones, the computing power is relatively low, and the communication cost is relatively high

[0005] Regarding the privacy protection processing of mobile cloud location-based query services, the industry has made a lot of efforts, and proposed attribute-based encryption technology, homomorphic encryption algorithm and location-based privacy protection query protocol, but the existing methods all have more or less Or less defects, such as: (1) the decryption time is too high to solve practical application problems, and in most cases, some applications can be solved with only a few addition or multiplication operations; (2) not suitable for solving problems based on Privacy protection issues in location queries; (3) This technology can protect user privacy only when the user density is very high and user behavior patterns are unpredictable; (4) Frequent interactions between data masters and data users are required, resulting in their computing The cost and communication cost is very high...

[0006] To sum up, for mobile cloud platforms, most users use smartphones to access social networks, and their computing and communication capabilities are limited.

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