Android platform SD card file protection method, terminal device and storage medium

Abstract

The invention relates to an Android platform SD card file protection method, a terminal device and a storage medium. The method comprises the steps of S1, receiving a package name of a to-be-encryptedapplication; S2, generating a corresponding random value according to the package name, and generating a target application set according to the package name and the corresponding random value; S3, storing the target application set file in a system path of Android; S4, when an application read-in or write-in request is received, judging whether a path of a to-be-read-in or write-in file in the request is a storage path corresponding to the storage card or not, and if so, entering the step S5; otherwise, executing a normal read-in or write-in process; S5, judging whether the package name is stored in a target application set or not, and if so, entering the step S6; otherwise, executing a normal read-in or write-in process; S6, generating a secret key and an IV value corresponding to the application; and S7, after encryption or decryption is carried out according to the secret key and the IV value, carrying out the normal read-in or write-in process. According to the invention, the file applied to the SD card is encrypted and decrypted from the system level.

Description

technical field [0001] The invention relates to the field of file protection, in particular to a file protection method for an SD card on an Android platform, a terminal device and a storage medium. Background technique [0002] At present, the application programs in the Android mobile phone are more and more diversified, and while enriching the user experience, more user data will be stored on the mobile phone. At present, almost all mainstream applications will save some personal data, downloaded or cached files of the user in the built-in SD card of the mobile phone. For example, WeChat will store personal data such as pictures of the user's circle of friends, favorite downloaded files, and small videos in chats. , QQ will store pictures and videos downloaded by users, and Baidu Netdisk will also store all files downloaded by users in it, etc. Since these data are directly stored in the built-in SD card in plain text, and Android phones lack a comprehensive data protect...

AI Technical Summary

Problems solved by technology

For a new application, if the developer notices this problem, it is relatively simple to implement, but it is not realistic to make these modifications to the current mature applications such as WeChat, QQ and other mainstream applications, because these applications are already very mature. Yes, modifying the source code will not only cause a lot of development work for developers, but also bring about huge stability problems and a series of subsequent problems. This kind of modification is unacceptable for these stability-seeking applications.

Therefore, although the above two protection methods are effective, they can only work for specific applications, and have no effect on most mainstream applications.

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