Android terminal sensor information protection method based on differential privacy

Abstract

The invention belongs to the technical field of mobile platform privacy protection, and discloses an Android terminal sensor information protection method based on differential privacy. Android platform sensor access interception and a sensor information protection strategy based on a differential privacy mechanism are combined, the privacy security of sensor data can be protected from a user sidein a data release link, and meanwhile, the phenomenon that an untrusted server maliciously steals the user privacy can be effectively prevented at a server side, and real information of a user can beidentified. The differential privacy protection mechanism achieves the privacy protection effect by adding Laplacian noise, and thus the sensitivity of attackers to user background information can beeliminated, and the privacy security can be improved; by remapping random points subjected to noise adding and re-calculating a search area range, the reliability of sensing data and the availabilityof an application program can be guaranteed; and the scheme of the invention has important theoretical values and practical significance for the privacy protection of mobile terminals in the future.

Description

technical field [0001] The invention belongs to the technical field of mobile platform privacy protection, and in particular relates to a method for protecting sensor information of an Android terminal based on differential privacy. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: With the development of mobile Internet, mobile smart terminals are used more and more widely. Advances in sensor technology and the application of sensors in smartphones have enabled mobile terminals to have rich perception capabilities. However, while convenience enriches people's lifestyles, it also brings huge security challenges. Based on the current situation that big data and machine learning can use sensor data to analyze user behavior and steal user information, stealing user privacy through smart terminal sensors is becoming an emerging malicious application attack method. The management and control of sensors by the Andr...

AI Technical Summary

Problems solved by technology

[0004] (1) The current defense strategies all provide false data or distorted data to the application program, which will inevitably reduce the precision and accuracy, and bring large errors; cause the application program to decrease in functionality or even crash

Protecting data privacy and providing fuzzy data will damage the data accuracy and affect the normal needs of users

[0005] (2) Multi-sensor identity authentication can only identify the user identity on the mobile terminal, and cannot effectively protect the data on the server side; attackers can still steal a large amount of sensor data through an unsafe server, and analyze user identity and behavior; Moreover, if the attacker obtains some background information, the security of the above defense strategies will be reduced.

[0006] (3) Existing technologies are sensitive to background knowledge. When an attacker obtains certain background knowledge, it will inevitably affect the protection of privacy.

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