Data protection method and terminal

Abstract

The invention provides a data protection method and a terminal, wherein the data protection method comprises the following steps: step 102, receiving an instruction of saving data to a shared data region from an application program and then confirming whether the instruction is automatically sent out by the application program; and step 104, saving the data to an RAM (random access memory) in the shared data region if the instruction is automatically sent out by the application program. By the invention, data probably read by a malicious program autonomously can be saved to the RAM while the data can be lost if the RAM is powered down, thus the potential safety hazard can be prevented from keeping for a long time and the data can be prevented from being used by the malicious program.

Description

technical field [0001] The present invention relates to mobile communication technology, in particular, to a data protection method and a terminal. Background technique [0002] In the current mobile terminal, some important data need to be frequently used by multiple different functional modules. For example, for a multi-mode multi-card mobile phone, multiple communication modules therein often need to use the data in the USIM card (Universal Subscriber Identity Module, Global Subscriber Identity Module), which requires the data of the USIM card to be shared. After a communication module is closed, the user can still read the data of the USIM card corresponding to the module. [0003] For the above content, the current solution is to read the information in each USIM card after the mobile phone is turned on, and store it in a shared area, that is, an area where multiple functional modules or application programs can perform read and write operations, and the AP ( The Appl...

AI Technical Summary

Problems solved by technology

The memory is divided into RAM (data lost after power failure) and FLASH (data is still saved after power failure). If the mobile phone automatically saves data in FLASH, the data will exist even if the mobile phone is turned off or power off, which is a potential safety hazard.

[0005] For example, the user's USIM information is copied to the FLASH by the application program without the user's knowledge. After the user shuts down the phone normally, takes out the USIM card, and then turns it on again, the information in the original USIM is still saved in the mobile phone. This is not what the user wants. Or in some cases, the user may temporarily use the mobile phone to other users, even if the original USIM has been taken out and replaced by another user's USIM, but because the data in the original USIM is saved in FLASH, The information in the original USIM will be leaked inadvertently, which is a potential safety hazard

That is to say, when the application program in the terminal saves the data in the mobile phone without the user's knowledge, it is easy to leak the highly private information in the USIM, causing a security risk

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