A silent photo detection method based on Android system

Abstract

The invention discloses a method for detecting silent photographing based on an Android system, including detection of the photographing behavior and detection of the View size of the photographing interface; the photographing process found in the app, and the photographing function searched in the photographing process to find the photographing function Finally, record the camera function and the function that calls the camera function, and then trace the flow chart of both the function that calls the camera function and the camera function, and loop to the end, you can find the call flow chart of the camera function completely , in the end, it is only necessary to determine whether there is an operation function for the user to click at the end of the process; if there is no click operation function, continue to detect the View size of the camera interface: find the camera preview frame SurfaceView, and determine the size of the two properties of SurfaceView , if the two properties of SurfaceView are less than the defined threshold, it is judged that the current app’s photo-taking behavior is silent photo-taking, which further shows that the current app is malicious.

Description

technical field [0001] The invention relates to a silent photographing detection method based on an Android system, and belongs to the technical field of system security. Background technique [0002] In daily life, the camera on the mobile phone also plays an indispensable and important role. Taking pictures, scanning QR codes, recording videos, and even AR functions all need to call the camera. It is also true that many apps on Android will apply to the system for permission to develop the camera, which accounts for 30.75%, which makes the security of the camera particularly important. However, at present, in the design of Android's camera call mechanism, there is an attack called silent camera, which is also known as a spy camera, that is, the malicious app returns the camera to the user's real-time photo preview frame size to set enough It can call the camera to take pictures without the user's knowledge. After the malicious app detects that the user has finished taking...

AI Technical Summary

Problems solved by technology

By investigating 3,827 popular apps on APK.com, and analyzing 241 of them that actually called the camera, it was found that the sensitive information that may be stolen by the silent camera attack, and found that through this information, the silent camera will cause further damage. the harm of

[0005] However, we found through testing that the current mainstream Android market detection platform or security apps on mobile phones cannot detect such attacks.

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