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A kind of protection method and device for multimedia data

A multimedia data and multimedia server technology, applied in the direction of digital data protection, user identity/authority verification, electrical components, etc., can solve problems such as the inability to play multimedia data normally, obtain keys, and the inability of mobile smart terminals to play multimedia data normally. Achieve the effect of protecting multimedia data

Active Publication Date: 2017-10-24
北京鸿达以太科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the multimedia data is protected by DMR technology, even if the mobile smart terminal downloads the multimedia data, it cannot obtain the key from the authorization center in an offline state, and thus cannot play the multimedia data normally.
In addition, if the network has a transmission error due to various reasons, the key may be damaged, which will also cause the mobile smart terminal to fail to play multimedia data normally, causing troubles for users

Method used

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  • A kind of protection method and device for multimedia data
  • A kind of protection method and device for multimedia data
  • A kind of protection method and device for multimedia data

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] see image 3 , which is a flowchart of a method for protecting multimedia data provided in Embodiment 1 of the present invention, the method includes the following steps:

[0060] Step 301: In response to a user's download request, the client downloads multimedia data to be played from the multimedia server, and the multimedia data is not protected by encryption.

[0061] Step 302: the client encrypts and protects the multimedia data by using the data key bound to itself.

[0062] The data key used to encrypt and decrypt the multimedia data is bound to the client, that is to say, the data key used by the client on different smart mobile terminals is different.

[0063] In a preferred embodiment of the present invention, the data key is pre-generated by the client according to the device identification of the smart mobile terminal. Therefore, a smart mobile terminal only has a unique device identifier, and the unique device identifier can only generate and correspond t...

Embodiment 2

[0114] In order to prevent the illegal client from maliciously downloading multimedia data from the multimedia server, a more preferred method is that before the client downloads the multimedia data to be played from the multimedia server, the client first accepts the verification performed by the verification server, and if the verification is passed, The client can further download multimedia data to be played from the multimedia server. On the contrary, if the authentication fails, the client cannot download the multimedia data to be played from the multimedia server. see Figure 6 , which is a flow chart of another method for protecting multimedia data provided in Embodiment 2 of the present invention, the method includes the following steps:

[0115] Verification process:

[0116] Step 601: The client encrypts the client key previously agreed with the verification server by using the encryption algorithm previously agreed with the verification server to generate a ciphe...

Embodiment 3

[0138] Corresponding to the above method for protecting multimedia data, an embodiment of the present invention also provides a device for protecting multimedia data. see Figure 7 , which is a structural diagram of a device for protecting multimedia data provided in Embodiment 3 of the present invention. The device includes a download unit 701 , a data encryption unit 702 , a storage unit 703 , a data decryption unit 704 and a playback unit 705 . The internal structure and connection relationship of the device will be further introduced below in conjunction with the working principle of the device.

[0139] The downloading unit 701 is configured to download multimedia data to be played from a multimedia server in response to a user's download request, and the multimedia data is not protected by encryption.

[0140] The data encryption unit 702 is configured to encrypt and protect the multimedia data with a data key bound to the client itself, wherein the data keys are differ...

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Abstract

One aspect of the present invention provides a method for protecting multimedia data. The method includes: in response to a user's download request, the client downloads multimedia data to be played from a multimedia server, and the multimedia data is not protected by encryption; the client uses a data key bound to itself to perform encryption on the multimedia data encryption protection; the client stores the encrypted and protected multimedia data; in response to the user's playback request, the client uses the data key to decrypt the encrypted and protected multimedia data; the client plays the decrypted multimedia data. The method of the invention can ensure the offline decryption and playback of the multimedia data while protecting the multimedia data. In addition, another aspect of the present invention provides a device for protecting multimedia data, for example, software installed on a smart mobile terminal.

Description

technical field [0001] The invention relates to the field of multimedia data processing, in particular to a method and device for protecting multimedia data. Background technique [0002] In the era of the rise of the mobile Internet, with the rapid development of mobile smart terminals, numerous multimedia applications appear in mobile smart terminals, and users' spending power on mobile smart terminals is also increasing day by day. However, due to the openness of the Internet, the multimedia data (such as audio data and video data) transmitted on the Internet is easy to be copied and reproduced at will. Therefore, piracy will spread in an orderly manner, and finally seriously affect the digital industry. healthy growth. [0003] In order to protect the copyright of multimedia data and safeguard the legitimate rights and interests of multimedia data providers, the industry currently provides many protection technologies for multimedia data, such as DRM (Digital Rights Man...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06G06F21/62H04L29/08H04L9/32
Inventor 孙淼李天翼
Owner 北京鸿达以太科技有限公司