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File protecting method, file protecting device, file decryption method, file decryption device and terminal

A technology for protecting devices and files, which is applied in the direction of security devices, digital data protection, computer security devices, etc., can solve the problems of lack of convenient and effective data protection, and achieve the effect of convenient encryption process, privacy protection and security, and convenient decryption process

Inactive Publication Date: 2014-12-24
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention discloses a file protection method, device, and file decryption method, device, and terminal, which are used to solve the problem in the prior art that there is no convenient and effective protection of data stored by users on the terminal

Method used

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  • File protecting method, file protecting device, file decryption method, file decryption device and terminal
  • File protecting method, file protecting device, file decryption method, file decryption device and terminal
  • File protecting method, file protecting device, file decryption method, file decryption device and terminal

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Embodiment Construction

[0037] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways defined and covered by the claims.

[0038] figure 1 It shows the flowchart of the file protection method described in the embodiment of the present invention.

[0039] see figure 1 As shown, file protection methods include:

[0040] The file protection method is applied to a terminal with a lock screen system, and the file protection method includes:

[0041] The key generation step a is to calculate the screen unlocking password set by the user according to a preset algorithm to generate an encryption key;

[0042] In the encryption step b, when the screen is locked, the encryption object is encrypted according to the encryption key.

[0043] First of all, for a terminal with a lock screen system, it can be a mobile phone with a lock screen system, a handheld tablet computer, etc...

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PUM

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Abstract

The invention discloses a file protecting method, a file protecting device, a file decryption method, a file decryption device and a terminal. Files on memory equipment of the terminal can be encrypted and decrypted. The file protecting method comprises the following steps of a secret key generating step: calculating a screen unlocking password set by a user according to a preset arithmetic so as to generate an encryption secret key; and an encryption step: encrypting an encryption object according to the encryption secret key when a screen is locked. By the technical scheme, an objective file or a private file can be quite convenient to encrypt and decrypt.

Description

technical field [0001] The present invention relates to mobile terminals or electronic products, and more specifically, to a file protection method, device, and file decryption method, device, and terminal. Background technique [0002] SD card (Secure Digital Memory Card) is a new generation memory device based on semiconductor flash memory, which is widely used in portable devices, such as mobile phones, digital cameras, personal digital assistants, multimedia players, etc. [0003] With the development of technology, the storage capacity of SD card has been significantly improved, which stores a large amount of user data, including audio, video, pictures, text and other files, which may contain user recordings, photos, videos and other multimedia files , may also contain important work documents and personal information of the user. These information are private files that the user does not want others to see. come to loss. [0004] The SD card hardware itself has encry...

Claims

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Application Information

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IPC IPC(8): G06F21/62G06F12/14
CPCG06F21/31G06F21/6209G06F2221/2141H04W12/04H04W12/033
Inventor 郭海林
Owner ZTE CORP
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