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Methods and devices for encrypting and decrypting video file and mobile terminal

A video file and mobile terminal technology, applied in security devices, secure communication devices, computer security devices, etc., can solve problems affecting encryption efficiency and slow moving speed of video files

Active Publication Date: 2014-04-09
TENCENT TECH (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Video files are the largest files among all files. When the specified storage location is a disk partition different from the disk partition where the original storage location is located, the moving speed of the encrypted video file will be very slow, which will affect the encryption efficiency.

Method used

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  • Methods and devices for encrypting and decrypting video file and mobile terminal
  • Methods and devices for encrypting and decrypting video file and mobile terminal
  • Methods and devices for encrypting and decrypting video file and mobile terminal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0126] See figure 2 , Embodiment 1 of the present invention provides a method for encrypting a video file, the method including:

[0127] 101: Obtain the encrypted video file and key.

[0128] 102: Use the key to encrypt the video file to be encrypted to obtain the encrypted video file.

[0129] 103: Acquire pre-scanned mobile terminals and partitions storing user data in the extended memory on the mobile terminal except for hidden partitions.

[0130] 104: Determine the partition where the video file to be encrypted is stored in all partitions, and move the encrypted video file to a preset folder in the partition where the video file to be encrypted is stored.

[0131] The technical solutions provided by the embodiments of the present invention have the following beneficial effects: by obtaining a video file to be encrypted and a key; using the key to encrypt the video file to be encrypted to obtain an encrypted video file; There is ciphertext in the file, and the video decoder canno...

Embodiment 2

[0133] See image 3 , The second embodiment of the present invention provides a method for encrypting a video file, the method including:

[0134] 201: Scan the mobile terminal and the partitions storing user data in the extended memory on the mobile terminal except the hidden partition; set a folder in each partition scanned.

[0135] Among them, before encrypting the video file, it is necessary to scan the mobile terminal and the partitions storing user data in the extended memory on the mobile terminal except the hidden partition. In view of the limited capacity of the built-in memory of the mobile terminal, users generally store video files in an extended memory, such as an SD (Secure Digital) card. Specifically, on the mobile terminal of the Android platform, scan the partitions that store user data in the SD card except the hidden partition, including, first, read the / proc / mounts file of the system to obtain all the mounting conditions of the entire system; Secondly, filter...

Embodiment 3

[0190] See Figure 7 , The third embodiment of the present invention provides a method for decrypting a video file, the method including:

[0191] 301: Obtain the video file and key to be decrypted.

[0192] 302: Use the key to decrypt the video file to be decrypted to obtain the decrypted video file.

[0193] 303: Determine the storage location of the video file to be decrypted before encryption, and move the decrypted video file to the storage location before encryption.

[0194] The technical solution provided by the embodiments of the present invention has the following beneficial effects: by obtaining a video file to be encrypted and a key; using the key to encrypt the video file to be encrypted to obtain an encrypted video file; There is ciphertext in the file, and the video decoder cannot identify the encrypted video file, which is of high security; obtain the pre-scanned mobile terminal and the partition that stores user data except the hidden partition in the extended memory ...

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Abstract

This discloses a video file encryption and decryption method, device, and mobile terminal. The encryption method can include: obtaining a to-be-encrypted video file and an encryption key, encrypting the video file using the encryption key to obtain an encrypted video file, obtaining scanned non-hidden partitions of a mobile terminal and an extended memory of the mobile terminal for storing user data, determining a partition storing the to-be-encrypted video file among the non-hidden partitions, and moving the encrypted video file to a folder in the partition storing the to-be-encrypted video file. The decryption method can include: obtaining a to-be-decrypted video file and a decryption key, decrypting the to-be-decrypted video file using the decryption key to obtain a decrypted video file, and determining a pre-encryption storage location of the to-be-decrypted video file and moving the decrypted video file to the pre-encryption storage location of the to-be-decrypted video file.

Description

Technical field [0001] The present invention relates to the field of mobile terminals, in particular to a method, device and mobile terminal for encrypting and decrypting video files. Background technique [0002] With the development of mobile terminal hardware and extended memory, users can store a large number of files in the mobile terminal and extended memory, and access these files through the mobile terminal. In order to protect privacy and file security, users want to encrypt files. [0003] Among them, encryption is to change the original data of the file with a special algorithm, so that even if an unauthorized user obtains the encrypted data, he still cannot understand the content of the file because he does not know the decryption method. Generally, these files include text documents, programs, pictures, and videos. For video files, it can be encrypted through existing video file encryption methods. Specifically, the existing video file encryption methods include fir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F21/62H04N5/92
CPCG06F2221/2107H04N21/64715H04L63/0428H04L2209/60H04W12/04H04L9/0897H04L63/062G06F21/62H04W12/02G06F21/602H04W12/65H04W12/03H04N21/2347Y10S707/99931Y10S707/99951
Inventor 陈建铭郑晓胜
Owner TENCENT TECH (SHENZHEN) CO LTD
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