CN112153417B - A kind of content scrambling protection method and system for streaming media content copyright - Google Patents

Abstract

The present invention relates to a content scrambling protection method and system for streaming media content copyright. The protection method includes: obtaining the original clear stream content of the streaming media; using an interference generator to perform interference processing on the original clear stream content of the streaming media, to determine the scrambled content, the descrambled content and the metadata of the descrambled content; adding the issuer watermark to the scrambled content, and The issuer encrypts the scrambled content with the issuer's watermark to determine the encrypted scrambled content; adds a playback terminal watermark to the descrambled content, and encrypts the descrambled content with the playback terminal watermark to determine the encrypted content. Descrambled content; the playback terminal decrypts the encrypted descrambled content in combination with the descrambled content metadata, determines the decrypted descrambled content and the decrypted scrambled content, and finally determines the content with the issuer's watermark and the playback terminal's watermark. Stream the original clear stream content. The invention can protect the content of the streaming media during the distribution process and prevent the occurrence of piracy.

Description

A kind of content scrambling protection method and system for streaming media content copyright

technical field

The present invention relates to the technical field of electronic information, in particular to a content scrambling protection method and system for the copyright of streaming media content.

Background technique

Streaming media content provided by existing streaming media content providers to streaming media service providers is unencrypted clear streaming content, and each streaming media service provider shall carry out corresponding content copyright protection. The copyright protection of their own streaming media content is prone to leakage problems in the process of sending to streaming media service providers, which will cause heavy losses to both streaming media content providers and streaming media service providers.

SUMMARY OF THE INVENTION

The object of the present invention is to provide a content scrambling protection method and system for the copyright of streaming media content, so as to solve the problem that the streaming media content provider cannot perform copyright protection on the streaming media content in the streaming media service, resulting in easy leakage in the streaming media. question.

For achieving the above object, the present invention provides the following scheme:

A content scrambling protection method for streaming media content copyright, comprising:

Obtain the original clear stream content of streaming media;

Use an interference generator to perform interference processing on the original clear stream content of the streaming media to determine scrambled content, descrambled content and descrambled content metadata; the descrambled content metadata is the descrambled content, the scrambled content And the relationship data between the original clear stream content of the streaming media;

Adding the issuer's watermark to the scrambled content, and the issuer encrypts the scrambled content with the issuer's watermark to determine the encrypted scrambled content;

adding a playback terminal watermark to the descrambled content, and encrypting the descrambled content with the playback terminal watermark to determine the encrypted descrambled content;

sending the encrypted scrambled content and the encrypted descrambled content to a playback terminal, and the playback terminal combines the descrambled content metadata to decrypt the encrypted descrambled content, Determine the descrambled content after decryption;

Decrypt the encrypted scrambled content by the playback terminal, and determine the decrypted scrambled content;

According to the decrypted scrambled content and the decrypted descrambled content, the original clear stream content of the streaming media with the issuer watermark and the playback terminal watermark is determined.

Optionally, the issuer watermark is added to the scrambled content, and the issuer encrypts the scrambled content with the issuer's watermark to determine the encrypted scrambled content, specifically including:

Using digital copyright protection technology, the information of the issuer is added to the distribution master containing the scrambled content in the form of a digital watermark;

After the release master is encrypted by means of symmetric encryption, the release ciphertext is determined; the release ciphertext is the encrypted scrambled content.

Optionally, adding a playback terminal watermark to the descrambled content, encrypting the descrambled content with the playback terminal watermark, and determining the encrypted descrambled content, and then further comprising:

While generating the encrypted descrambled content, obtain the ciphertext of the descrambled content;

Determine the descramble content key according to the descrambled content metadata in combination with the terminal certificate;

Determine a descrambled content key file according to the descrambled content key and the encrypted descrambled content;

Send the descrambled content ciphertext and the descrambled content key file to the playback terminal.

Optionally, according to the decrypted scrambled content and the decrypted descrambled content, determine the original clear stream content of the streaming media with the issuer watermark and the playback terminal watermark, specifically including:

Decrypt the descrambled content ciphertext according to the descrambled content key file, and determine the decrypted descrambled content and the decrypted descrambled content metadata;

According to the decrypted scrambled content, the decrypted descrambled content and the decrypted descrambled content metadata, the original clear stream content of the streaming media with the issuer watermark and the playback terminal watermark is determined.

Optionally, decrypting the descrambled content ciphertext according to the descrambled content key file, and determining the decrypted descrambled content and the decrypted descrambled content metadata, specifically including:

Obtain the public key of the playback terminal, and in combination with the descrambled content key, use the public key to perform an asymmetric encryption operation on the encrypted descrambled content to determine a descrambled content key file; the descrambled content key file is determined; When the scrambled content ciphertext and the descrambled content key file are played on the terminal through the network, they are transmitted to the playing terminal in real time;

Obtain the private key of the playback terminal, and use the private key to decrypt the descrambled content key file, and determine the decrypted descrambled content metadata and the decryption key of the descrambled content ciphertext;

The descrambled content ciphertext is decrypted according to the decryption key of the descrambled content ciphertext, and the decrypted descrambled content is determined.

A content scrambling protection system for streaming media content copyright, comprising:

The module for obtaining the original clear stream content of streaming media, which is used to obtain the original clear stream content of streaming media;

a scrambled content, descrambled content and descrambled content metadata determination module, configured to use an interference generator to perform interference processing on the original clear stream content of the streaming media, and determine the scrambled content, descrambled content and descrambled content metadata; The descrambled content metadata is the relationship data between the descrambled content, the scrambled content and the original clear stream content of the streaming media;

The encrypted scrambled content determination module is used to add the issuer watermark to the scrambled content, and the issuer encrypts the scrambled content with the issuer's watermark to determine the encrypted scrambled content;

an encrypted descrambled content determination module, configured to add a playback terminal watermark to the descrambled content, encrypt the descrambled content with the playback terminal watermark, and determine the encrypted descrambled content;

The decrypted descrambled content determination module is configured to send the encrypted scrambled content and the encrypted descrambled content to a playback terminal, and the playback terminal combines the descrambled content metadata with the metadata of the descrambled content. The encrypted descrambled content is decrypted, and the decrypted descrambled content is determined;

a decrypted scrambled content determination module, used for decrypting the encrypted scrambled content by the playback terminal to determine the decrypted scrambled content;

A stream media original clear stream content determination module with issuer watermark and playback terminal watermark is used to determine the original stream media with issuer watermark and playback terminal watermark according to the decrypted scrambled content and the decrypted descrambled content. Stream content.

Optionally, the encrypted scrambled content determination module specifically includes:

a watermark adding unit, used for using digital copyright protection technology to add the information of the issuer in the form of digital watermark to the distribution master that contains the scrambled content;

The encrypted scrambled content determination unit is configured to encrypt the release master by using a symmetric encryption method, and then determine the release ciphertext; the release ciphertext is the encrypted scrambled content.

Optionally, also include:

a descrambled content ciphertext acquisition module, configured to obtain the descrambled content ciphertext while generating the encrypted descrambled content;

a descrambled content key determination module, configured to determine the descrambled content key according to the descrambled content metadata in combination with the terminal certificate;

a descrambling content key file determining module, configured to determine a descrambling content key file according to the descrambling content key and the encrypted descrambling content;

A sending module, configured to send the descrambled content ciphertext and the descrambled content key file to the playing terminal.

Optionally, the described stream media original clear stream content determination module with issuer watermark and playback terminal watermark specifically includes:

The decrypted descrambled content and the decrypted descrambled content metadata determination unit is used to decrypt the descrambled content ciphertext according to the descrambled content key file, and determine the decrypted descrambled content and the decrypted descrambled content. Metadata of descrambled content;

The streaming media original clear stream content determination unit with the issuer watermark and the playback terminal watermark is used to determine the issuer watermark and Play the original clear stream content of the streaming media watermarked by the terminal.

Optionally, the decrypted descrambled content and the decrypted descrambled content metadata determination unit specifically include:

Descrambled content key file determination subunit, used to obtain the public key of the playback terminal, and in combination with the descrambled content key, use the public key to perform an asymmetric encryption operation on the encrypted descrambled content , determine the descrambling content key file; when the descrambling content ciphertext and the descrambling content key file are played on the terminal through the network, they are transmitted to the playing terminal in real time;

The decrypted descrambled content metadata determination subunit is used to obtain the private key of the playback terminal, and use the private key to decrypt the descrambled content key file to determine the decrypted descrambled content metadata and all the decrypted content metadata. Describe the decryption key for descrambled content ciphertext;

The decrypted descrambled content determination subunit is configured to decrypt the descrambled content ciphertext according to the decryption key of the descrambled content ciphertext to determine the decrypted descrambled content.

According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects: the present invention provides a content scrambling protection method and system for the copyright of streaming media content, which divides the original clear stream content of the streaming media into scrambled content and descrambled content. The content consists of two parts, only the scrambled content is released during the streaming media distribution process, and the descrambled content is provided to the terminal player in real time during the streaming media playback stage, which protects the streaming media content during the distribution process and prevents piracy.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some of the present invention. In the embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative labor.

1 is a flowchart of a content scrambling protection method for streaming media content copyright provided by the present invention;

2 is a flowchart of another content scrambling protection method for streaming media content copyright provided by the present invention;

Fig. 3 is the data transmission flow chart provided by the present invention;

4 is a flowchart of a simplified content scrambling protection method for streaming media content copyright without adding a watermark provided by the present invention;

5 is a flow chart of a simplified content scrambling protection method for the copyright of streaming media content provided by the present invention adding a watermark;

FIG. 6 is a structural diagram of a content scrambling protection system for streaming media content copyright provided by the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The purpose of the present invention is to provide a content scrambling protection method and system for the copyright of streaming media content, which can protect the content of streaming media during the distribution process and prevent the occurrence of piracy.

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

In order to more easily understand the technical solutions of the present invention, the following are the technical terms of the present invention:

Scrambling: The operation of adding disturbing data to the original data.

Clear stream: The original video image data of the streaming video.

Scrambled content: The video image content obtained after scrambled the streaming media video image is the scrambled content.

Descrambled content: Content that can restore scrambled content is called descrambled content.

Metadata of descrambled content: Data used to describe the relationship between descrambled content, scrambled content, and clear stream of streaming media content.

Streaming media service platform: At present, video service platforms such as websites and APPs that provide streaming media services in the market.

Streaming media service terminal: The terminal of video service platforms such as websites and APPs that provide streaming media services in the current market.

Streaming media interference generator: a program used to scramble the clear stream of the streaming media content. After the clear stream is processed, the scrambled content, the descrambled content and the descrambled content metadata are generated.

1 is a flowchart of a content scrambling protection method for streaming media content copyright provided by the present invention. As shown in FIG. 1, a content scrambling protection method for streaming media content copyright includes:

Step 101: Obtain the original clear stream content of the streaming media.

Step 102: Use an interference generator to perform interference processing on the original clear stream content of the streaming media, and determine the scrambled content, the descrambled content, and the descrambled content metadata; the descrambled content metadata is the descrambled content, the Relationship data between the scrambled content and the original clear stream content of the streaming media.

Step 103: Add the issuer's watermark to the scrambled content, and the issuer encrypts the scrambled content with the issuer's watermark to determine the encrypted scrambled content.

The step 103 specifically includes: using digital copyright protection technology, adding the information of the issuer in the form of a digital watermark to the distribution master containing the scrambled content; encrypting the distribution master by using a symmetric encryption method After that, the ciphertext of the release version is determined; the ciphertext of the release version is the encrypted scrambled content.

Step 104: Add a playback terminal watermark to the descrambled content, encrypt the descrambled content with the playback terminal watermark, and determine the encrypted descrambled content.

After the step 104, the method further includes: acquiring the ciphertext of the descrambled content while generating the encrypted descrambled content; determining a descrambled content key according to the descrambled content metadata in combination with the terminal certificate; The scrambled content key and the encrypted descrambled content determine a descrambled content key file; the descrambled content ciphertext and the descrambled content key file are sent to the playback terminal.

Step 105 : Send the encrypted scrambled content and the encrypted descrambled content to a playback terminal, and the playback terminal combines the descrambled content metadata with the encrypted descrambled content. Decryption is performed to determine the descrambled content after decryption.

Step 106: Decrypt the encrypted scrambled content by the playback terminal, and determine the decrypted scrambled content.

Step 107: According to the decrypted scrambled content and the decrypted descrambled content, determine the original clear stream content of the streaming media with the issuer watermark and the playback terminal watermark.

The step 107 specifically includes: decrypting the descrambled content ciphertext according to the descrambled content key file, and determining the decrypted descrambled content and the decrypted descrambled content metadata; The scrambled content, the decrypted descrambled content, and the decrypted descrambled content metadata determine the original clear stream content of the streaming media with the issuer's watermark and the playback terminal's watermark.

Decrypting the descrambled content ciphertext according to the descrambled content key file, and determining the decrypted descrambled content and the decrypted descrambled content metadata, specifically includes: acquiring the public key of the playback terminal , and combined with the descrambled content key, use the public key to perform asymmetric encryption operations on the encrypted descrambled content to determine the descrambled content key file; the descrambled content ciphertext and the descrambled content When the scrambled content key file is played on the terminal through the network, it is transmitted to the playback terminal in real time; the private key of the playback terminal is obtained, and the descrambled content key file is decrypted by using the private key to determine the decrypted descrambled content key file. Content metadata and the decryption key of the descrambled content ciphertext; decrypt the descrambled content ciphertext according to the decryption key of the descrambled content ciphertext, and determine the decrypted descrambled content.

Based on the above technical solutions of the present invention, the present invention is applied to practical applications. FIG. 2 is a flowchart of another content scrambling protection method for copyright of streaming media content provided by the present invention, and the specific process is shown in FIG. 2 . :

1) The original clear stream content of the streaming media is processed by the interference generator to obtain scrambled content, descrambled content and descrambled content metadata.

The invention divides the video image into two parts: scrambled image and descrambled image, and then adds publisher watermark to the scrambled image, adds the watermark of the playback terminal to the descrambled image, and simultaneously encrypts and distributes the descrambled content according to the SMPTE standard.

The methods of processing video images by the interference generator specifically include the following two methods:

Method 1: Intercept image method, use random algorithm to find a pixel of the image within the scope of the image (image length and width pixels), and take this pixel as the starting point to take a certain length and width of the image, this image is Descramble the content, and at the same time change the image of the intercepted position in the original image to an image of all black or other colors. This is the scrambling process. At the same time, the length and width of the intercepted image and the pixel position information of the intercepted image are recorded in a text. The content recorded in this text file in the file is called descrambled content metadata.

Method 2: The method of intercepting important person images or scenes in the image, selecting a specific image before using scrambling, finding the specific image in the video image by the image comparison method, and extracting the content of the specific image position in the video, Changing the image at a specific image position to a completely black or other color image is a scrambling process. The captured image is descrambled content, and the content of recording the location information of the captured image is called descrambled content metadata.

The protection scope of the above method is: similar methods of intercepting an image or changing the color of an image to scramble the content.

2) The interference generator performs the interception image (used to cover or deduct the position information of the image) for each image or special frame image in the video image frame according to the random algorithm (the method for processing the video image by the interference generator above) ).

Store the frame number of the masked image and the key coordinate value of the pixel corresponding to the mask area into the video descrambling content metadata file; save the image data corresponding to the mask area as the descrambling content. Store the masked streaming content as a release master.

3) The distribution master of streaming media According to the different distributors, the information of the distributor is added in the form of digital watermark (here, the mature algorithm of digital copyright protection DRM is used) to the distribution master.

4) The distribution master uses the symmetric encryption method to perform encryption calculation in the system of the issuer to determine the ciphertext of the distribution, which becomes a streaming media distribution. Among them, the symmetric encryption method adopts the content encryption technology of the smpte standard, that is, the Advanced Encryption Standard (Advanced Encryption Standard, AES) encryption algorithm.

5) The release version decrypts the release board at the playback terminal (app, video website, etc.) to obtain the plaintext of the content of the release version. Among them, the AES algorithm can be used for decryption.

6) The metadata of the descrambled content is a structured description file, which includes information describing the descrambled content, such as the frame number, the pixel range of the mask area, and the like.

7) Descramble the content metadata and the encryption key of the descrambled content key file, and obtain the descrambled content key file by performing asymmetric encryption operation on them using the RSA public key of the playback terminal.

8) Using digital watermark technology, the information of the issuer or the player terminal is added to the descrambled content as watermark content.

Calculation method of digital watermark content:

Digital watermark content = base64 (SHA (information of playback terminal))

9) The descrambled content is calculated by AES symmetrical encryption to obtain the descrambled content ciphertext, and the descrambled content ciphertext and the descrambled content key file are transmitted to the playing terminal through the network when the terminal is playing.

Algorithm formula: descramble content ciphertext=decode _AES256 (descramble content)

10) The playback terminal uses its own RSA private key to decrypt and descramble the content key file to obtain the AES decryption key for the descrambled content metadata and the descrambled content ciphertext.

For the key production process, refer to the production method of KDM in the smpte standard.

11) The playback terminal uses the AES key to perform AES decryption calculation on the ciphertext of the descrambled content to obtain the descrambled content.

12) The playback terminal uses the descrambled content, the descrambled content metadata, and the plaintext of the distribution content to obtain the original video content through descrambling calculation.

Fig. 3 is the data transmission flow chart provided by the present invention, as shown in Fig. 3, mainly includes 3 processes:

1) Certificate issuance process.

2) Content distribution process.

B1: The "content platform" stores and manages the streaming media content of content providers.

B2: The content platform provides the "content processing platform" with the original streaming media clear stream content for the "content processing platform" to process the stream media clear stream content.

B3: The "content processing platform" realizes the scramble processing of the original content of the streaming media, processes the clear stream content into scrambled content and descrambled content, and generates the metadata of the descrambled content at the same time, and uses the digital watermark technology to use the summary of the publisher's certificate fingerprint as the Digital watermark information is added to the scrambled content. The scrambled content is packaged and sent to a "third-party streaming media service platform".

B4: The descrambled content and descrambled content metadata are managed in the content security service platform.

B5: The "third-party streaming media service platform" processes the scrambled content, and can encode the scrambled content according to the needs of distribution, and make it into a video encoding format required by the terminal.

B6: When playing, the terminal selects the scrambled content in the video coding format that it needs.

3) Terminal content playback process

C1: When the terminal plays the video content, it first obtains the scrambled content from the "third-party streaming media service platform", and then requests the "key (SKDM) platform" for the descrambled content. The request information includes: the unique identifier of the video content information , the unique identifier of the terminal, the image size of the descrambled content, and other information.

C2: After receiving the terminal request, the "Key (SKDM) Platform" forwards the terminal request information and the terminal fingerprint to the "Content Security Service Platform".

C3: The "content security service platform" finds the descrambled content that meets the requirements according to the unique identification of the video content, the image size of the descrambled content, etc., and obtains the digital watermark information after digest calculation of the terminal fingerprint, and increases the digital watermark information in real time to In descrambling content,

C4: The "Content Security Service Platform" randomly generates an AES encryption key to encrypt the descrambled content.

C5: The "content security service platform" returns the encryption key and the URL of the download address of the encrypted and descrambled content and the metadata of the descrambled content to the "key (SKDM) platform".

C6: The "content security service platform" makes the AES key of the encrypted and descrambled content and the URL of the download address into an SKDM key file. The SKDM uses the public key of the terminal certificate to encrypt the AES key of the encrypted and descrambled content.

C7: The "content security service platform" sends the SKDM to the terminal.

C8: The terminal decrypts the SKDM with the private key of the terminal certificate to obtain the AES key, and downloads the encrypted and descrambled content according to the download URL.

C9: After the terminal downloads the encrypted and descrambled content, it uses the AES key to decrypt and calculate the encrypted and descrambled content to obtain the descrambled content and the descrambled content metadata. The terminal restores the scrambled content to the original through the descrambled content and the descrambled content metadata. Video streaming content.

Fig. 4 is the simplified content scrambling protection method for streaming media content copyright without adding watermark provided by the present invention, as shown in Fig. 4:

After the streaming media content is processed by the streaming media interference generator, the streaming media scrambled content, descrambled content and descrambled content metadata are obtained.

After the scrambled content of streaming media is processed and encoded, content of different encodings such as mpeg, jpeg2000, H264, and H265 can be obtained. At the same time, it can also be processed into content of different sizes, such as 1080P, 720P, 480P, etc.

Streaming media descrambling content can be processed to obtain content of different encodings such as mpeg, jpeg2000, H264, and H265. At the same time, it can also be processed into content of different sizes, such as 1080P, 720P, 480P, etc.

When the terminal is playing, the terminal uses the description information of the descrambled content metadata to match and restore the scrambled content and the descrambled content to obtain the original streaming media content corresponding to the image size (1080P, 720P, 480P, etc.).

Fig. 5 is the simplified flow chart of the content scrambling protection method for the copyright of streaming media content provided by the present invention by adding a watermark. The watermark content is added to the descrambled content.

6 is a structural diagram of a content scrambling protection system for streaming media content copyright provided by the present invention. As shown in FIG. 6 , a content scrambling protection system for streaming media content copyright includes:

The original clear stream content acquisition module 601 of the streaming media is used to acquire the original clear stream content of the streaming media.

a scrambled content, descrambled content, and descrambled content metadata determination module 602, configured to use an interference generator to perform interference processing on the original clear stream content of the streaming media, and determine scrambled content, descrambled content, and descrambled content metadata; The descrambled content metadata is relationship data between the descrambled content, the scrambled content and the original clear stream content of the streaming media.

The encrypted scrambled content determination module 603 is configured to add the issuer watermark to the scrambled content, and the issuer encrypts the scrambled content with the issuer's watermark to determine the encrypted scrambled content.

The encrypted scrambled content determination module 603 specifically includes: a watermark addition unit, used for utilizing digital copyright protection technology, the information of the issuer is added in the form of a digital watermark to the distribution master that contains the scrambled content; The encrypted scrambled content determination unit is configured to encrypt the release master by using a symmetric encryption method, and then determine the release ciphertext; the release ciphertext is the encrypted scrambled content.

The present invention further includes: a descrambling content ciphertext acquisition module, configured to obtain the descrambled content ciphertext while generating the encrypted descrambled content; a descrambled content key determination module, used for combining with the terminal certificate, according to the Describe the descrambled content metadata to determine the descrambled content key; the descrambled content key file determining module is used to determine the descrambled content key file according to the descrambled content key and the encrypted descrambled content; send The module is configured to send the descrambled content ciphertext and the descrambled content key file to the playback terminal.

The encrypted descrambled content determination module 604 is configured to add a playback terminal watermark to the descrambled content, encrypt the descrambled content with the playback terminal watermark, and determine the encrypted descrambled content.

The decrypted descrambled content determination module 605 is configured to send the encrypted scrambled content and the encrypted descrambled content to the playback terminal, and the playback terminal combines the descrambled content metadata with the playback terminal, Decrypt the encrypted descrambled content to determine the decrypted descrambled content.

The decrypted scrambled content determination module 606 is configured to decrypt the encrypted scrambled content by the playback terminal to determine the decrypted scrambled content.

The original clear stream content determination module 607 of the streaming media with the issuer watermark and the playback terminal watermark is used to determine the streaming media with the issuer watermark and the playback terminal watermark according to the decrypted scrambled content and the decrypted descrambled content Original clear stream content.

The streaming media original clear stream content determination module 607 with the issuer watermark and the playback terminal watermark specifically includes: the decrypted descrambled content and the decrypted descrambled content metadata determination unit, which is used to determine the descrambled content according to the descrambled content key. The file decrypts the ciphertext of the descrambled content, and determines the decrypted descrambled content and the decrypted descrambled content metadata; the stream media original clear stream content determination unit with the issuer watermark and the playback terminal watermark is used for The decrypted scrambled content, the decrypted descrambled content, and the decrypted descrambled content metadata determine the original clear stream content of the streaming media with the issuer's watermark and the playback terminal's watermark.

The decrypted descrambled content and the decrypted descrambled content metadata determination unit specifically includes: a descrambled content key file determination subunit for acquiring the public key of the playback terminal, and combining the descrambled content with the descrambled content Content key, using the public key to perform asymmetric encryption operation on the encrypted descrambled content to determine the descrambled content key file; the descrambled content ciphertext and the descrambled content key file pass through the network When the terminal plays, it is transmitted to the playback terminal in real time; the decrypted descrambled content metadata determination subunit is used to obtain the private key of the playback terminal, and use the private key to decrypt the descrambled content key file , determine the decrypted descrambled content metadata and the decryption key of the descrambled content ciphertext; the decrypted descrambled content determination subunit is used for decrypting the descrambled content ciphertext according to the decryption key of the descrambled content ciphertext The ciphertext of the descrambled content is decrypted, and the decrypted descrambled content is determined.

The invention divides the original content of the streaming media into two parts: the scrambled content and the descrambled content. During the streaming media distribution process, only the scrambled content is distributed, and the descrambled content is provided to the terminal player in real time during the streaming media playback stage, thereby protecting the distribution. The content of the streaming media in the process can prevent the occurrence of piracy.

The present invention is compatible with the existing streaming media service system, because the method uses the scrambled content of the streaming media instead of the streaming media content to provide the streaming media service platform, the streaming media service platform does not perceive the change of the content, and does not affect the streaming media service. The content processing functions such as content encoding conversion and image resolution conversion in the platform will not affect and change the content distribution process.

The invention can add a digital watermark in the descrambled content in real time, and the digital watermark in the descrambled content adds the digital watermark information to the restored streaming media content when the terminal restores the streaming media content.

The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant part can be referred to the description of the method.

In this paper, specific examples are used to illustrate the principles and implementations of the present invention. The descriptions of the above embodiments are only used to help understand the methods and core ideas of the present invention; meanwhile, for those skilled in the art, according to the present invention There will be changes in the specific implementation and application scope. In conclusion, the contents of this specification should not be construed as limiting the present invention.

Claims (10)

1. a content scrambling protection method for streaming media content copyright, is characterized in that, comprises: Obtain the original clear stream content of streaming media; Use an interference generator to perform interference processing on the original clear stream content of the streaming media to determine scrambled content, descrambled content and descrambled content metadata; the descrambled content metadata is the descrambled content, the scrambled content And the relationship data between the original clear stream content of the streaming media; Adding the issuer's watermark to the scrambled content, and the issuer encrypts the scrambled content with the issuer's watermark to determine the encrypted scrambled content; adding a playback terminal watermark to the descrambled content, and encrypting the descrambled content with the playback terminal watermark to determine the encrypted descrambled content; sending the encrypted scrambled content and the encrypted descrambled content to a playback terminal, and the playback terminal combines the descrambled content metadata to decrypt the encrypted descrambled content, Determine the decrypted descrambled content; wherein, the issuer sends the encrypted scrambled content to the playback terminal during the streaming media distribution process, and the copyright party sends the encrypted descrambled content in real time during the streaming media playback stage to the playback terminal; Decrypt the encrypted scrambled content by the playback terminal, and determine the decrypted scrambled content; According to the decrypted scrambled content and the decrypted descrambled content, the original clear stream content of the streaming media with the issuer watermark and the playback terminal watermark is determined. 2. the content scrambling protection method for the copyright of streaming media content according to claim 1, is characterized in that, described adding issuer watermark to described scrambled content, and by issuer to have issuer watermark after The scrambled content is encrypted, and the encrypted scrambled content is determined, including: Using digital copyright protection technology, the information of the issuer is added to the distribution master containing the scrambled content in the form of a digital watermark; After the release master is encrypted by means of symmetric encryption, the release ciphertext is determined; the release ciphertext is the encrypted scrambled content. 3. The content scrambling protection method for the copyright of streaming media content according to claim 2, wherein the descrambled content is added with a playback terminal watermark, and the descrambled content with the playback terminal watermark is performed. Encrypt, determine the encrypted descramble content, and then include: While generating the encrypted descrambled content, obtain the ciphertext of the descrambled content; Determine the descramble content key according to the descrambled content metadata in combination with the terminal certificate; Determine a descrambled content key file according to the descrambled content key and the encrypted descrambled content; Send the descrambled content ciphertext and the descrambled content key file to the playback terminal. 4. The content scrambling protection method for the copyright of streaming media content according to claim 3, characterized in that, according to the decrypted scrambled content and the decrypted descrambled content, it is determined that there is an issuer The watermark and the original clear stream content of the streaming media watermarked by the playback terminal, including: Decrypt the descrambled content ciphertext according to the descrambled content key file, and determine the decrypted descrambled content and the decrypted descrambled content metadata; According to the decrypted scrambled content, the decrypted descrambled content and the decrypted descrambled content metadata, the original clear stream content of the streaming media with the issuer watermark and the playback terminal watermark is determined. 5. The content scrambling protection method for the copyright of streaming media content according to claim 4, wherein the decryption is performed on the descrambled content ciphertext according to the descrambled content key file, and the decryption is determined. The descrambled content and the decrypted descrambled content metadata, including: Obtain the public key of the playback terminal, and in combination with the descrambled content key, use the public key to perform an asymmetric encryption operation on the encrypted descrambled content to determine a descrambled content key file; the descrambled content key file is determined; When the scrambled content ciphertext and the descrambled content key file are played on the terminal through the network, they are transmitted to the playing terminal in real time; Obtain the private key of the playback terminal, and use the private key to decrypt the descrambled content key file, and determine the decrypted descrambled content metadata and the decryption key of the descrambled content ciphertext; The descrambled content ciphertext is decrypted according to the decryption key of the descrambled content ciphertext, and the decrypted descrambled content is determined. 6. a content scrambling protection system for streaming media content copyright, is characterized in that, comprises: The module for obtaining the original clear stream content of streaming media, which is used to obtain the original clear stream content of streaming media; a scrambled content, descrambled content and descrambled content metadata determination module, configured to use an interference generator to perform interference processing on the original clear stream content of the streaming media, and determine the scrambled content, descrambled content and descrambled content metadata; The descrambled content metadata is the relationship data between the descrambled content, the scrambled content and the original clear stream content of the streaming media; The encrypted scrambled content determination module is used to add the issuer watermark to the scrambled content, and the issuer encrypts the scrambled content with the issuer's watermark to determine the encrypted scrambled content; an encrypted descrambled content determination module, configured to add a playback terminal watermark to the descrambled content, encrypt the descrambled content with the playback terminal watermark, and determine the encrypted descrambled content; The decrypted descrambled content determination module is configured to send the encrypted scrambled content and the encrypted descrambled content to a playback terminal, and the playback terminal combines the descrambled content metadata with the metadata of the descrambled content. The encrypted descrambled content is decrypted, and the decrypted descrambled content is determined; wherein, the issuer sends the encrypted scrambled content to the playback terminal during the streaming media distribution process, and the copyright party sends the encrypted scrambled content to the playback terminal. The descrambled content is sent to the playback terminal in real time during the streaming media playback stage; a decrypted scrambled content determination module, used for decrypting the encrypted scrambled content by the playback terminal to determine the decrypted scrambled content; A stream media original clear stream content determination module with issuer watermark and playback terminal watermark is used to determine the original stream media with issuer watermark and playback terminal watermark according to the decrypted scrambled content and the decrypted descrambled content. Stream content. 7. The content scrambled protection system for the copyright of streaming media content according to claim 6, wherein the encrypted scrambled content determination module specifically comprises: a watermark adding unit, used for using digital copyright protection technology to add the information of the issuer in the form of digital watermark to the distribution master that contains the scrambled content; The encrypted scrambled content determination unit is configured to encrypt the release master by using a symmetric encryption method, and then determine the release ciphertext; the release ciphertext is the encrypted scrambled content. 8. The content scrambling protection system for streaming media content copyright according to claim 7, characterized in that, further comprising: a descrambled content ciphertext acquisition module, configured to obtain the descrambled content ciphertext while generating the encrypted descrambled content; a descrambled content key determination module, configured to determine the descrambled content key according to the descrambled content metadata in combination with the terminal certificate; a descrambling content key file determining module, configured to determine a descrambling content key file according to the descrambling content key and the encrypted descrambling content; A sending module, configured to send the descrambled content ciphertext and the descrambled content key file to the playing terminal. 9. The content scrambling protection system for the copyright of streaming media content according to claim 8, characterized in that, the stream media original clear stream content determination module with issuer watermark and playback terminal watermark specifically comprises: The decrypted descrambled content and the decrypted descrambled content metadata determination unit is used to decrypt the descrambled content ciphertext according to the descrambled content key file, and determine the decrypted descrambled content and the decrypted descrambled content. Metadata of descrambled content; The streaming media original clear stream content determination unit with the issuer watermark and the playback terminal watermark is used to determine the issuer watermark and Play the original clear stream content of the streaming media watermarked by the terminal. 10. The content scrambling protection system for the copyright of streaming media content according to claim 9, wherein the decrypted descrambled content and the decrypted descrambled content metadata determination unit specifically include: Descrambled content key file determination subunit, used to obtain the public key of the playback terminal, and in combination with the descrambled content key, use the public key to perform an asymmetric encryption operation on the encrypted descrambled content , determine the descrambling content key file; when the descrambling content ciphertext and the descrambling content key file are played on the terminal through the network, they are transmitted to the playing terminal in real time; The decrypted descrambled content metadata determination subunit is used to obtain the private key of the playback terminal, and use the private key to decrypt the descrambled content key file to determine the decrypted descrambled content metadata and all the decrypted content metadata. Describe the decryption key for descrambled content ciphertext; The decrypted descrambled content determination subunit is configured to decrypt the descrambled content ciphertext according to the decryption key of the descrambled content ciphertext to determine the decrypted descrambled content.

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