File segmental protection method, device and system

A segmented protection and file technology, applied in transmission systems, computer security devices, electrical components, etc., can solve problems such as poor user experience, data destruction, and inability to restore original data, etc., and achieve the effect of flexible file content

Inactive Publication Date: 2011-04-20
HUAWEI DEVICE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, for the segmentation protection of video files, the usual method is to add pictures (mosaics) to the original data frame, or directly destroy the original data; the problem with this method is that it is difficult or impossible to restore the original data
[0004] At present, for the protection of network streaming media files, the usual practice is to divide media files into different files, and open different permissions for different files. When users watch audio and video, they first log in to the website that provides media services. Only users can watch media files; the problem with this approach is that maintenance is more troublesome and user experience is not good

Method used

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  • File segmental protection method, device and system
  • File segmental protection method, device and system
  • File segmental protection method, device and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1, local media files

[0026] Currently popular video files are generally stored in data blocks in units of frames, such as avi and mpeg; audio files are generally stored in data blocks with sampling points as the smallest unit, such as wav and mp3.

[0027] In order to protect audio and video files by segments accurately, a protection flag can be added to each smallest unit of data block. Of course, in order to reduce storage space, multiple data blocks can also share a protection flag. The physical storage location of the protection flag can be independent of the original media file, such as adding a separate companion file; it can also be stored in the original media file, for example, some media files themselves have an index structure of data blocks, For example, in an avi2.0 file, each frame of data has an index data block, and for this type of media file, the protection flag can be placed in the index block.

[0028] During the playback of the local m...

Embodiment 2

[0031] Embodiment two, network streaming media file

[0032] Currently, media data (such as audio and video data) are mostly transmitted in the form of streaming media on the network. The so-called streaming media refers to the media format played on the Internet in a streaming manner. Streaming media is also called streaming media. The common application is: merchants use an audio and video transmission server to disassemble the program into data packets and send them to the network; users decompress the data through decompression equipment and restore them to audio and video programs .

[0033] The segmentation protection process of streaming media is basically the same as that of local media files, except that these interactive processes are transmitted through network packets. The differences mainly include the following aspects:

[0034] (1) The authority control between the streaming media player and the streaming media server is completed by streaming media control p...

Embodiment 3

[0039] Embodiment three, text file

[0040] Text files are usually organized in the format of chapters and paragraphs. Protection signs can be added to different chapters and paragraphs of text files, and the implementation method is basically similar to that of local media files.

[0041] The main difference from the processing of local media files is: the display of protected text data blocks. Since the text file is not a streaming file, it is generally presented on the reader when it is opened; therefore, the protected part needs to be hidden, for example, a special encryption flag can be added to the encrypted area, and decryption can be activated by triggering this flag process. If the decryption is correct, the protected text data block is displayed, and if the decryption is wrong, the protected text data block is continued to be hidden.

[0042] In addition, it should be noted that the segment protection of the multimedia file can be implemented with reference to the...

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PUM

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Abstract

The embodiment of the invention discloses a file segmental protection method, which comprises the following content: setting a protection mark on the part to be protected in each segment of a file; when the file with protection marks are used, prompting a user of inputting a decryption key, or performing authentication; and if the decryption is correct or the user passes the authentication, allowing the protected parts of the file to be used or skipping or hiding the protected parts of the file. In addition, the embodiment of the invention also discloses a local file segmental protection system, a network streaming media file segmental protection system, and a streaming media server. When the scheme provided by the invention is used, the more flexible protection of file contents can be realized, and the needs of people for more accurate information encryption and authorization can be satisfied.

Description

technical field [0001] The invention relates to the protection of digital products, in particular to a method, device and system for file segment protection. Background technique [0002] At present, the protection of digital products is mostly encrypted or authorized at the file level. This kind of granular protection is not flexible enough in some application scenarios. For example, for an audio and video file, you may want to shield the plot that is unhealthy for children, then you need to encrypt the content of this part independently; or, for a network streaming media file, such as a recording of a meeting, you may only need to protect the part involving issues of confidential information; or, for a digitally copyrighted text file, the publisher may wish to authorize separate sections within the file. [0003] At present, for the segmentation protection of video files, the usual method is to add pictures (mosaics) on the original data frame, or directly destroy the ori...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/30H04L9/32H04L29/06
CPCG06F2221/2107G06F21/6209G06F21/602H04L9/32
Inventor 王亚飞张莉陈慧雍
Owner HUAWEI DEVICE CO LTD
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