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Media data encryption method, system, device and storage medium

A technology of media data and encryption method, which is applied in the direction of digital transmission system, transmission system, encryption device with shift register/memory, etc., can solve the problem that business auxiliary information cannot be properly protected, and achieve comprehensive protection effect

Active Publication Date: 2021-05-28
SUZHOU KEDA TECH
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AI Technical Summary

Problems solved by technology

Although, when the ISO BMFF media is encrypted and protected using the CENC scheme, the protection of the media sample data can be obtained; however, since there is no encryption method defined for the application-related configuration data different from the media sample data, the business application is attached to the ISO BMFF media Business support information on the website is not properly protected

Method used

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  • Media data encryption method, system, device and storage medium
  • Media data encryption method, system, device and storage medium
  • Media data encryption method, system, device and storage medium

Examples

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Embodiment Construction

[0054] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals denote the same or similar structures in the drawings, and thus their repeated descriptions will be omitted.

[0055] First, here is a brief introduction to the format of the media file in the ISO BMFF format.

[0056] In the ISO BMFF standard, media files are piled up with blocks (boxes). A block is a piece of continuous binary data that has a clear byte length (byte length) and defines a block type (box type). According to the block type Definitions allow certain types of subblocks to be placed inside certain blocks. The ISO BMFF sta...

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Abstract

The present invention provides a media data encryption method, system, device and storage medium. The method includes the following steps: first encrypting the media file to obtain the first encrypted file; encrypting the application configuration data to obtain the encrypted application configuration data; using unencrypted application configuration data to encrypt encryption parameters in the first encrypted file to obtain a second encrypted file; finally combining the encrypted application configuration data and the second encrypted file as an encrypted media data file. On the basis of encrypting media files, the present invention provides an encryption protection scheme for application configuration data attached to encrypted media files by business applications, which not only protects the media content in encrypted media files, but also protects the application Configuration data: By using the application configuration data to encrypt the encryption parameters of the media file, tampering with the application configuration data will also lead to the destruction of the encrypted media file, and the protection of the media file is more comprehensive.

Description

technical field [0001] The invention relates to the technical field of data encryption, in particular to a media data encryption method, system, device and storage medium. Background technique [0002] The ISO / IEC 14496-12 standard document published by the International Organization for Standardization (ISO) defines the ISO BMFF (ISO Base Media File Format) media file format, which describes media including audio media and video media. Structural data for samples, and describes methods for expressing media by combining structural data and media sample data. [0003] The ISO / IEC 23001-7 standard document published by ISO defines the CENC (Common ENCryption in ISO BMFF files) general encryption scheme based on the extension of the ISO BMFF media file format. This scheme describes a set of structural data for the ISO BMFF media file format. Describes the encryption process of encrypting media sample data including audio media and video media, and describes the method of encry...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04L9/06
CPCH04L9/0631H04L9/0637H04L63/0435
Inventor 谢志钢胡小鹏万春雷陈冬根
Owner SUZHOU KEDA TECH
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