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Method for ciphering and deciphering embedded type multimedia file

A technology of embedded multimedia and multimedia files, applied in electrical components, digital data protection, computer security devices, etc., can solve problems such as embezzling digital content, reducing creative will, and hindering social development

Inactive Publication Date: 2010-01-13
WUDI SCI & TECH (XIAN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although it is very convenient to convert the creative content into digital compressed files, due to the skilled file copying technology, the digital content is quite easy to be reproduced by illegal users with various copying, burning and other technologies. In addition, with the prevalence of the Internet, It also makes the illegally reproduced digital content spread and spread endlessly, making it impossible to prevent the misappropriation of digital content
When creators' hard work is easily stolen, their willingness to create is greatly reduced, which hinders social development

Method used

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  • Method for ciphering and deciphering embedded type multimedia file
  • Method for ciphering and deciphering embedded type multimedia file

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] see figure 1 Shown, the inventive method is used for generating encrypted file, comprises the following steps:

[0028] Step 101: Obtain the standard file header of the multimedia file.

[0029] The standard file header of the multimedia file must be parsed before being read, and the multimedia file can be selected from the group consisting of AVI, MPEG, BMP, JEPG and GIF.

[0030] Step 102: Store the standard file header.

[0031] The standard file header must be saved first to prevent the standard file header from being overwritten and lost in subsequent steps.

[0032] Step 103: Generate a file structure with the same size as the standard file header.

[0033] The structure of the file structure can be:

[0034] typedef struct tagProtectHead

[0035] {

[0036] BYTE m_nRandom0[BeforeHead]; / / x bytes

[0037] ULONG m_ulHeadOne; / / 4 bytes

[0038] BYTE m_nRandom1[BeforeHead]; / / y bytes

[0039] ULONG m_ulHeadTwo; / / 4 bytes

[0040] ULONG m_ulOth...

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Abstract

The invention relates to a method for encrypting and decrypting embedded multimedia files. The method comprises the following steps: firstly, obtaining a standard file header of a multimedia file, secondly, storing the standard file header, thirdly, generating a file structure body with same size with the standard file header, fourthly, writing the file header body into the multimedia file to replace the standard file header, fifthly, encrypting the standard file header to form an encrypted file header, and sixthly, writing the encrypted file header into the tail portion of the multimedia file to enable the multimedia file to form an encrypted file. The invention can prevent illegal users from refashioning and using the multimedia file, thereby realizing the purpose of protecting the multimedia file, and the problem that the multimedia file is easily peculated is solved.

Description

technical field [0001] The invention relates to an encryption and decryption method, in particular to an embedded multimedia file encryption and decryption method. Background technique [0002] With the advancement of computer digital technology, more and more creative content such as movies, music, books, magazines, and comics are converted into digital compressed files, which are not only easy to carry and use, but also easy to save creative content. , coupled with the gradual popularity of portable electronic devices, therefore, the archive of digital content has become the mainstream of the market. [0003] Although it is very convenient to convert the creative content into digital compressed files, due to the skilled file copying technology, the digital content is quite easy to be reproduced by illegal users with various copying, burning and other technologies. In addition, with the prevalence of the Internet, It also makes the illegally reproduced digital content spre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F21/00H04L9/18H04N7/24G06F21/62
Inventor 陈淮琰石智嘉
Owner WUDI SCI & TECH (XIAN) CO LTD