CN112153417B - Content scrambling protection method and system for copyright of streaming media content - Google Patents
Content scrambling protection method and system for copyright of streaming media content Download PDFInfo
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- 238000005516 engineering process Methods 0.000 claims description 9
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
- H04N21/2389—Multiplex stream processing, e.g. multiplex stream encrypting
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
- H04N21/26613—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel for generating or managing keys in general
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
- H04N21/4385—Multiplex stream processing, e.g. multiplex stream decrypting
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
- H04N21/835—Generation of protective data, e.g. certificates
- H04N21/8358—Generation of protective data, e.g. certificates involving watermark
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Abstract
The invention relates to a content scrambling protection method and a system for copyright of streaming media content. The protection method comprises the following steps: acquiring original clear stream content of the streaming media; performing interference processing on the original clear stream content of the streaming media by using an interference generator, and determining scrambled content, descrambled content and descrambled content metadata; adding an issuer watermark to the scrambled content, encrypting the scrambled content with the issuer watermark by the issuer, and determining the encrypted scrambled content; adding a play terminal watermark to the descrambled content, encrypting the descrambled content with the play terminal watermark, and determining the encrypted descrambled content; and the playing terminal is combined with the descrambling content metadata to decrypt the encrypted descrambling content, determine the decrypted descrambling content and the decrypted scrambling content, and finally determine the original clear stream content of the stream media with the distributor watermark and the playing terminal watermark. The invention can protect the content of the streaming media in the distribution process and prevent piracy.
Description
Technical Field
The invention relates to the technical field of electronic information, in particular to a content scrambling protection method and a content scrambling protection system for copyright of streaming media content.
Background
The existing streaming media content provider provides the streaming media service provider with unencrypted clear streaming content, each streaming media service provider performs corresponding content copyright protection, the streaming media content provider cannot perform copyright protection on the streaming media content in streaming media service, and the leakage problem is easy to occur in the process of sending the streaming media content provider to the streaming media service provider, so that the streaming media provider and the streaming media service provider can cause great loss.
Disclosure of Invention
The invention aims to provide a content scrambling protection method and a content scrambling protection system for copyright of streaming media content, so as to solve the problem that a streaming media content provider cannot perform copyright protection on the streaming media content in a streaming media service, so that the streaming media content is easy to leak.
In order to achieve the purpose, the invention provides the following scheme:
a content scrambling protection method for copyright of streaming media content, comprising:
acquiring original clear stream content of the streaming media;
performing interference processing on the original clear stream content of the streaming media by using an interference generator, and determining scrambled content, descrambled content and descrambled content metadata; the metadata of the descrambled content is the relationship data among the descrambled content, the scrambled content and the original clear stream content of the streaming media;
adding an issuer watermark to the scrambled content, encrypting the scrambled content with the issuer watermark by the issuer, and determining the encrypted scrambled content;
adding a play terminal watermark to the descrambled content, encrypting the descrambled content with the play terminal watermark, and determining the encrypted descrambled content;
sending the encrypted scrambled content and the encrypted descrambling content to a playing terminal, and decrypting the encrypted descrambling content by the playing terminal in combination with the descrambling content metadata to determine the decrypted descrambling content;
decrypting the encrypted scrambled content by the playing terminal and determining the decrypted scrambled content;
and determining the original clear stream content of the stream media with the distributor watermark and the playing terminal watermark according to the decrypted scrambled content and the decrypted descrambled content.
Optionally, the adding an issuer watermark to the scrambled content, and encrypting the scrambled content with the issuer watermark by the issuer to determine the encrypted scrambled content specifically includes:
adding information of a distributor to a distribution master plate containing the scrambled content in the form of digital watermark by using a digital copyright protection technology;
after the issuing master plate is encrypted in a symmetric encryption mode, an issuing plate ciphertext is determined; the release ciphertext is the encrypted scrambled content.
Optionally, the adding a play terminal watermark to the descrambled content, encrypting the descrambled content with the play terminal watermark, and determining the encrypted descrambled content, further includes:
while generating the encrypted descrambling content, acquiring a descrambling content ciphertext;
determining a descrambling content key according to the descrambling content metadata by combining a terminal certificate;
determining a descrambling content key file according to the descrambling content key and the encrypted descrambling content;
and sending the descrambling content cipher text and the descrambling content key file to a playing terminal.
Optionally, the determining, according to the decrypted scrambled content and the decrypted descrambled content, the original streaming content of the streaming media having the issuer watermark and the player terminal watermark specifically includes:
decrypting the descrambling content ciphertext according to the descrambling content key file, and determining the decrypted descrambling content and the decrypted descrambling content metadata;
and determining the original clear stream content of the streaming media with the distributor watermark and the playing terminal watermark according to the decrypted scrambled content, the decrypted descrambled content and the decrypted descrambled content metadata.
Optionally, the decrypting the descrambling content ciphertext according to the descrambling content key file to determine the decrypted descrambling content and the decrypted descrambling content metadata specifically includes:
acquiring a public key of the playing terminal, and performing asymmetric encryption operation on the encrypted descrambling content by using the public key in combination with the descrambling content key to determine a descrambling content key file; the descrambling content cipher text and the descrambling content key file are transmitted to a playing terminal in real time when the terminal plays through a network;
acquiring a private key of the playing terminal, decrypting the descrambling content key file by using the private key, and determining the decrypted descrambling content metadata and a decryption key of the descrambling content ciphertext;
and decrypting the descrambling content ciphertext according to the decryption key of the descrambling content ciphertext to determine the decrypted descrambling content.
A content scrambling protection system for copyright of streaming media content, comprising:
the system comprises a streaming media original clear stream content acquisition module, a clear stream content acquisition module and a clear stream content acquisition module, wherein the streaming media original clear stream content acquisition module is used for acquiring streaming media original clear stream content;
the system comprises a scrambled content, a descrambled content and descrambled content metadata determination module, a content processing module and a content processing module, wherein the scrambled content, the descrambled content and the descrambled content metadata determination module are used for performing interference processing on the original clear stream content of the streaming media by using an interference generator to determine the scrambled content, the descrambled content and the descrambled content metadata; the metadata of the descrambled content is the relationship data among the descrambled content, the scrambled content and the original clear stream content of the streaming media;
the encrypted scrambled content determining module is used for adding an issuer watermark to the scrambled content, encrypting the scrambled content with the issuer watermark by the issuer and determining the encrypted scrambled content;
the encrypted descrambling content determining module is used for adding a playing terminal watermark to the descrambling content, encrypting the descrambling content with the playing terminal watermark and determining the encrypted descrambling content;
the decrypted descrambling content determining module is used for sending the encrypted scrambling content and the encrypted descrambling content to a playing terminal, and the playing terminal decrypts the encrypted descrambling content by combining the descrambling content metadata to determine the decrypted descrambling content;
the decrypted scrambled content determining module is used for decrypting the encrypted scrambled content by the playing terminal and determining the decrypted scrambled content;
and the streaming media original clear stream content determining module is used for determining the streaming media original clear stream content with the issuer watermark and the playing terminal watermark according to the decrypted scrambled content and the decrypted descrambled content.
Optionally, the encrypted scrambled content determining module specifically includes:
a watermark adding unit, which is used for adding the information of the issuer to the issuing mother plate containing the scrambled content in the form of digital watermark by using the digital copyright protection technology;
the encrypted scrambled content determining unit is used for determining an issuing version ciphertext after encrypting the issuing master version in a symmetric encryption mode; the release ciphertext is the encrypted scrambled content.
Optionally, the method further includes:
a descrambling content ciphertext acquisition module, configured to acquire a descrambling content ciphertext while generating the encrypted descrambling content;
a descrambling content key determining module, configured to determine a descrambling content key according to the descrambling content metadata in combination with the terminal certificate;
a descrambled content key file determining module, configured to determine a descrambled content key file according to the descrambled content key and the encrypted descrambled content;
and the sending module is used for sending the descrambling content cipher text and the descrambling content key file to a playing terminal.
Optionally, the module for determining the original clear stream content of the streaming media with the issuer watermark and the playing terminal watermark specifically includes:
the decrypted descrambling content and decrypted descrambling content metadata determining unit is used for decrypting the descrambling content ciphertext according to the descrambling content key file and determining the decrypted descrambling content and decrypted descrambling content metadata;
and the original clear stream content determining unit of the streaming media with the publisher watermarks and the playing terminal watermarks is used for determining the original clear stream content of the streaming media with the publisher watermarks and the playing terminal watermarks according to the decrypted scrambled content, the decrypted descrambled content and the decrypted descrambled content metadata.
Optionally, the unit for determining the decrypted descrambled content and the decrypted descrambled content metadata specifically includes:
a descrambled content key file determining subunit, configured to obtain a public key of the playback terminal, and perform asymmetric encryption operation on the encrypted descrambled content by using the public key in combination with the descrambled content key to determine a descrambled content key file; the descrambling content cipher text and the descrambling content key file are transmitted to a playing terminal in real time when the terminal plays through a network;
the decrypted descrambling content metadata determining subunit is used for acquiring a private key of the playing terminal, decrypting the descrambling content key file by using the private key and determining the decrypted descrambling content metadata and a decryption key of the descrambling content ciphertext;
and the decrypted descrambling content determining subunit is used for decrypting the descrambling content ciphertext according to the decryption key of the descrambling content ciphertext and determining the decrypted descrambling content.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects: the invention provides a content scrambling protection method and a content scrambling protection system for copyright of streaming media content, which divide the original clear streaming content of the streaming media into two parts of scrambled content and descrambled content, only the scrambled content is issued in the distribution process of the streaming media, and the descrambled content is provided for a terminal player in real time at the playing stage of the streaming media, thereby protecting the content of the streaming media in the distribution process and preventing piracy.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
Fig. 1 is a flowchart of a content scrambling protection method for copyright of streaming media content according to the present invention;
fig. 2 is a flow chart of another content scrambling protection method for copyright of streaming media content provided by the present invention;
FIG. 3 is a flow chart of data transmission provided by the present invention;
FIG. 4 is a simplified flow chart of a content scrambling protection method for copyright of streaming media content without adding watermark provided by the present invention;
FIG. 5 is a flow chart of a simplified watermarking content scrambling protection method for copyright of streaming media content according to the present invention;
fig. 6 is a block diagram of a content scrambling protection system for copyright of streaming media content according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a content scrambling protection method and a content scrambling protection system for the content copyright of streaming media, which can protect the content of the streaming media in the distribution process and prevent piracy.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
In order to more conveniently understand the technical scheme of the invention, the following technical terms are used:
scrambling: adding the original data to the operation of the interference data.
Clearing the fluid: raw video image data of streaming video.
Scrambling content: the video image content obtained by scrambling the streaming media video image is the scrambled content.
Descrambling the content: content that is capable of restoring scrambled content is descrambled.
Descrambling content metadata: data describing a relationship between the descrambled content and the scrambled content and the streamcast of the streaming media content.
The streaming media service platform: currently, video service platforms such as websites and APPs providing streaming media services are in the market.
The streaming media service terminal: currently, terminals of video service platforms such as websites and APPs providing streaming media services are in the market.
A streaming media interference generator: and a program for scrambling the clear stream of the streaming media content, wherein the clear stream is processed to generate the disturbed flow content, the descrambled content and the descrambled content metadata.
Fig. 1 is a flowchart of a content scrambling protection method for copyright of streaming media content provided by the present invention, and as shown in fig. 1, a content scrambling protection method for copyright of streaming media content includes:
step 101: and acquiring the original clear stream content of the streaming media.
Step 102: performing interference processing on the original clear stream content of the streaming media by using an interference generator, and determining scrambled content, descrambled content and descrambled content metadata; the metadata of the descrambled content is the relationship data among the descrambled content, the scrambled content and the original clear stream content of the streaming media.
Step 103: and adding an issuer watermark to the scrambled content, encrypting the scrambled content with the issuer watermark by the issuer, and determining the encrypted scrambled content.
The step 103 specifically includes: adding information of a distributor to a distribution master plate containing the scrambled content in the form of digital watermark by using a digital copyright protection technology; after the issuing master plate is encrypted in a symmetric encryption mode, an issuing plate ciphertext is determined; the release ciphertext is the encrypted scrambled content.
Step 104: and adding a playing terminal watermark to the descrambled content, encrypting the descrambled content with the playing terminal watermark, and determining the encrypted descrambled content.
The step 104 further includes: while generating the encrypted descrambling content, acquiring a descrambling content ciphertext; determining a descrambling content key according to the descrambling content metadata by combining a terminal certificate; determining a descrambling content key file according to the descrambling content key and the encrypted descrambling content; and sending the descrambling content cipher text and the descrambling content key file to a playing terminal.
Step 105: and sending the encrypted scrambled content and the encrypted descrambling content to a playing terminal, and decrypting the encrypted descrambling content by the playing terminal in combination with the descrambling content metadata to determine the decrypted descrambling content.
Step 106: and the playing terminal decrypts the encrypted scrambled content and determines the decrypted scrambled content.
Step 107: and determining the original clear stream content of the stream media with the distributor watermark and the playing terminal watermark according to the decrypted scrambled content and the decrypted descrambled content.
The step 107 specifically includes: decrypting the descrambling content ciphertext according to the descrambling content key file, and determining the decrypted descrambling content and the decrypted descrambling content metadata; and determining the original clear stream content of the streaming media with the distributor watermark and the playing terminal watermark according to the decrypted scrambled content, the decrypted descrambled content and the decrypted descrambled content metadata.
The decrypting the descrambling content ciphertext according to the descrambling content key file to determine the decrypted descrambling content and the decrypted descrambling content metadata specifically includes: acquiring a public key of the playing terminal, and performing asymmetric encryption operation on the encrypted descrambled content by using the public key in combination with the descrambled content key to determine a descrambled content key file; the descrambling content cipher text and the descrambling content key file are transmitted to a playing terminal in real time when the terminal plays through a network; acquiring a private key of the playing terminal, decrypting the descrambling content key file by using the private key, and determining the decrypted descrambling content metadata and a decryption key of the descrambling content ciphertext; and decrypting the descrambling content ciphertext according to the decryption key of the descrambling content ciphertext to determine the decrypted descrambling content.
Based on the above technical solution of the present invention, applying the present invention 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 flow is as shown in fig. 2:
1) the original clear stream content of the streaming media is processed by an interference generator to obtain scrambled content, descrambled content and descrambled content metadata.
The invention divides the video image into two parts of scrambling image and descrambling image, then adds distributor watermark to the scrambling image, adds watermark of playing terminal to the descrambling image, and encrypts and issues the descrambling content according to SMPTE standard.
The method for processing the video image by the interference generator specifically comprises the following two steps:
the method comprises the following steps: the image intercepting method includes finding out one pixel point of the image in the image range, taking the pixel point as the starting point, taking the image with certain length and width, scrambling the image to obtain scrambled content, and recording the length and width values of the intercepted image and the pixel position information of the intercepted image in one text file.
The second method comprises the following steps: a method for intercepting important person image or scenery in image includes such steps as choosing a particular image before scrambling, finding out the particular image in video image by image contrast method, extracting the contents of the particular image position in video, and changing the image position to black or other color image. The intercepted image is descrambling content, and the content for recording the position information of the intercepted image is called descrambling content metadata.
The protection range of the method is as follows: similar methods of intercepting images or altering the color of images scramble content.
2) The interference generator performs the calculation of the truncated image (for covering or deducting the position information of the image) on each image in the video image frame or the special frame image according to a random algorithm (the method for processing the video image by the interference generator in the above).
Storing the frame number of the image subjected to the masking operation and the key coordinate value of the pixel point corresponding to the masking region into a descrambling content metadata file of the video; the image data corresponding to the mask area is saved as descrambled content. And storing the streaming media content calculated by the mask as a distribution master.
3) The distribution master of the streaming media adds (here, a sophisticated algorithm of digital rights protection DRM is used) information of the distributor to the distribution master in the form of a digital watermark, depending on the distributor.
4) The distribution master is encrypted and calculated in a symmetric encryption mode in a system of a distributor, and then a distribution cipher text is determined and becomes a streaming media distribution version. The symmetric Encryption mode adopts the content Encryption technology of the smpt Standard, namely an Advanced Encryption Standard (AES) Encryption algorithm.
5) The release edition decrypts the release board at a play terminal (app, video website, etc.) to obtain the release edition content plaintext. Where the decryption can be performed using the AES algorithm.
6) The descrambling content metadata is a structured description file and contains information describing descrambling content, such as frame number, pixel point range of the mask area and the like.
7) And the descrambling content metadata and the encryption key of the descrambling content key file are subjected to asymmetric encryption operation by using an RSA public key of the playing terminal to obtain the descrambling content key file.
8) The information of the distributor or the playing terminal is added to the descrambled content as watermark content using digital watermarking technology.
The digital watermark content calculation method comprises the following steps:
digital watermark content base64(SHA (information of playing terminal))
9) And the descrambling content is subjected to AES symmetric encryption calculation to obtain a descrambling content ciphertext, and the descrambling content ciphertext and the descrambling content key file are transmitted to the playing terminal when the terminal plays through the network.
The algorithm formula is as follows: descrambling content ciphertextAES256(descrambling content)
10) The playing terminal uses the RSA private key of the playing terminal to decrypt the descrambling content key file to obtain the metadata of the descrambling content and the AES decryption key of the descrambling content ciphertext.
And the key making process refers to a KDM making method in the smpte standard.
11) And the playing terminal uses the AES key to carry out AES decryption calculation on the descrambling content ciphertext to obtain the descrambling content.
12) And the playing terminal uses the descrambled content, the descrambled content metadata and the release content plaintext to obtain the original video content through descrambling calculation.
Fig. 3 is a data transmission flow chart provided by the present invention, as shown in fig. 3, which mainly includes 3 flows:
1) and issuing a certificate.
2) And (5) content distribution process.
B1: the "content platform" stores and manages streaming content for content providers.
B2: the content platform provides the original streaming media streaming content to the content processing platform, and the content processing platform is used for processing the streaming media streaming content.
B3, the 'content processing platform' implements the scrambling process to the original content of the stream media, processes the clear stream content into the scrambled content and the descrambled content, and generates the metadata of the descrambled content, and adds the abstract of the certificate fingerprint of the issuer as the digital watermark information to the scrambled content by the digital watermark technology. And packaging the scrambled content and then sending the packaged scrambled content to a third-party streaming media service platform.
B4: the descrambled content and descrambled content metadata are managed in a content security service platform.
B5: the 'third-party streaming media service platform' processes the scrambled content, and can encode the scrambled content according to distribution requirements to manufacture a video encoding format required by the terminal.
B6: when playing, the terminal selects the scrambled content of the video coding format required by the terminal.
3) Terminal content playing process
C1: when playing video content, the terminal firstly obtains scrambled content from a third-party streaming media service platform, and then requests a key (SKDM) platform to descramble the content, wherein the request information comprises: unique identification of video content information, unique identification of a terminal, image size of descrambled content and the like.
C2: the 'Secret Key (SKDM) platform' forwards the terminal request information and the terminal fingerprint to the 'content security service platform' after receiving the terminal request.
C3: the content security service platform finds the descrambling content meeting the requirement according to the information of the unique identification of the video content, the image size of the descrambling content and the like, performs abstract calculation on the terminal fingerprint to obtain digital watermark information, adds the digital watermark information into the descrambling content in real time,
c4: the content security service platform randomly generates an encryption key of AES to encrypt the descrambled content.
C5: the 'content security service platform' returns the URL of the encryption key and the download address of the encrypted descrambled content and descrambled content metadata to the 'key (SKDM) platform'.
C6: the 'content security service platform' makes the AES key and the download address URL of the encrypted descrambled content into an SKDM key file, and the public key of the terminal certificate is used in the SKDM to encrypt the AES key of the encrypted descrambled content.
C7: the 'content security service platform' sends the SKDM to the terminal.
C8: and the terminal decrypts the SKDM by using a private key of the terminal certificate to obtain an AES key, and downloads the encrypted descrambling content according to the downloading address URL.
C9: after the terminal downloads the encrypted descrambling content, the encrypted descrambling content is decrypted and calculated by using the AES key to obtain descrambling content and descrambling content metadata, and the terminal restores the scrambling content into the original video clear stream content through the descrambling content and the descrambling content metadata.
Fig. 4 is a flow chart of the simplified content scrambling protection method for copyright of streaming media content without adding watermark provided by the present invention, as shown in fig. 4:
the stream media content is processed by the stream media interference generator to obtain the stream media scrambling content, descrambling content and descrambling content metadata.
After the content processing and encoding are carried out on the stream media scrambled content, different encoded contents such as mpeg, jpeg2000, H264, H265 and the like can be obtained. And can also be processed into different sizes, such as 1080P, 720P, 480P, etc.
After the content of the stream media descrambled content is processed, the content of different codes such as mpeg, jpeg2000, H264, H265 and the like can be obtained. And can also be processed into different sizes, such as 1080P, 720P, 480P, etc.
When the terminal plays, the terminal uses the description information of the metadata of the descrambled content to match the scrambled content with the descrambled content and perform recovery calculation to obtain the original streaming media content with the corresponding image size (1080P, 720P, 480P, etc.).
Fig. 5 is a flow chart of a simplified content scrambling protection method for copyright of streaming media content with watermark added, as shown in fig. 5, the streaming media descrambled content is added with digital watermark content through a "real-time digital watermark generator".
Fig. 6 is a structural diagram of a content scrambling protection system for copyright of streaming media content provided by the present invention, and as shown in fig. 6, a content scrambling protection system for copyright of streaming media content includes:
the streaming media original clear stream content obtaining module 601 is configured to obtain streaming media original clear stream content.
A scrambled content, descrambled content and descrambled content metadata determination module 602, configured to perform interference processing on the original clear stream content of the streaming media by using an interference generator, and determine the scrambled content, descrambled content and descrambled content metadata; the metadata of the descrambled content is the relationship data among the descrambled content, the scrambled content and the original clear stream content of the streaming media.
An encrypted scrambled content determining module 603, configured to add an issuer watermark to the scrambled content, and encrypt, by an issuer, the scrambled content with the issuer watermark to determine the encrypted scrambled content.
The encrypted scrambled content determining module 603 specifically includes: a watermark adding unit, which is used for adding the information of the issuer to the issuing mother plate containing the scrambled content in the form of digital watermark by using the digital copyright protection technology; the encrypted scrambled content determining unit is used for determining an issuing version ciphertext after encrypting the issuing master version in a symmetric encryption mode; the release ciphertext is the encrypted scrambled content.
The invention also includes: a descrambling content ciphertext acquisition module, configured to acquire a descrambling content ciphertext while generating the encrypted descrambling content; a descrambling content key determining module, configured to determine a descrambling content key according to the descrambling content metadata in combination with the terminal certificate; a descrambled content key file determining module, configured to determine a descrambled content key file according to the descrambled content key and the encrypted descrambled content; and the sending module is used for sending the descrambling content cipher text and the descrambling content key file to a playing terminal.
The encrypted descrambled content determining module 604 is configured to add a play terminal watermark to the descrambled content, encrypt the descrambled content with the play terminal watermark, and determine the encrypted descrambled content.
A decrypted descrambling content determining module 605, configured to send the encrypted scrambled content and the encrypted descrambling content to a playing terminal, and the playing terminal decrypts the encrypted descrambling content by combining the descrambling content metadata, so as to determine the decrypted descrambling content.
A decrypted scrambled content determining module 606, configured to decrypt, by the playing terminal, the encrypted scrambled content and determine the decrypted scrambled content.
The original streaming media clear stream content determining module 607 with the publisher watermark and the playing terminal watermark is configured to determine the original streaming media clear stream content with the publisher watermark and the playing terminal watermark according to the decrypted scrambled content and the decrypted descrambled content.
The module 607 for determining the original clear stream content of the streaming media with the publisher watermark and the playing terminal watermark specifically includes: the decrypted descrambling content and decrypted descrambling content metadata determining unit is used for decrypting the descrambling content ciphertext according to the descrambling content key file and determining the decrypted descrambling content and decrypted descrambling content metadata; and the original clear stream content determining unit of the streaming media with the publisher watermarks and the playing terminal watermarks is used for determining the original clear stream content of the streaming media with the publisher watermarks and the playing terminal watermarks according to the decrypted scrambled content, the decrypted descrambled content and the decrypted descrambled content metadata.
The unit for determining the decrypted descrambled content and the decrypted descrambled content metadata specifically includes: a descrambled content key file determining subunit, configured to obtain a public key of the playback terminal, and perform asymmetric encryption operation on the encrypted descrambled content by using the public key in combination with the descrambled content key to determine a descrambled content key file; the descrambling content cipher text and the descrambling content key file are transmitted to a playing terminal in real time when the terminal plays through a network; the decrypted descrambling content metadata determining subunit is used for acquiring a private key of the playing terminal, decrypting the descrambling content key file by using the private key and determining the decrypted descrambling content metadata and a decryption key of the descrambling content ciphertext; and the decrypted descrambling content determining subunit is used for decrypting the descrambling content ciphertext according to the decryption key of the descrambling content ciphertext and determining the decrypted descrambling content.
The invention divides the original content of the stream media into two parts of scrambled content and descrambled content, only the scrambled content is issued in the process of issuing the stream media, and the descrambled content is provided for the terminal player in real time in the stage of playing the stream media, thereby protecting the content of the stream media in the issuing process and preventing piracy from occurring.
The invention can be compatible with the prior streaming media service system, because the method uses the scrambling content of the streaming media to replace the streaming media content to be provided for the streaming media service platform, the streaming media service platform can not sense the change of the content and can not influence the content processing functions of the streaming media service platform, such as the coding conversion, the image resolution conversion and the like of the content, thereby not influencing and changing the content distribution process.
The invention can increase the 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 streaming media content is restored by the terminal.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the method part for description.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. A content scrambling protection method for copyright of streaming media content, comprising:
acquiring original clear stream content of the streaming media;
performing interference processing on the original clear stream content of the streaming media by using an interference generator, and determining scrambled content, descrambled content and descrambled content metadata; the metadata of the descrambled content is the relationship data among the descrambled content, the scrambled content and the original clear stream content of the streaming media;
adding an issuer watermark to the scrambled content, encrypting the scrambled content with the issuer watermark by the issuer, and determining the encrypted scrambled content;
adding a play terminal watermark to the descrambled content, encrypting the descrambled content with the play terminal watermark, and determining the encrypted descrambled content;
sending the encrypted scrambled content and the encrypted descrambling content to a playing terminal, and decrypting the encrypted descrambling content by the playing terminal in combination with the descrambling content metadata to determine the decrypted descrambling content; the issuer sends the encrypted scrambled content to a playing terminal in the streaming media issuing process, and the copyright side sends the encrypted descrambled content to the playing terminal in real time in the streaming media playing stage;
decrypting the encrypted scrambled content by the playing terminal and determining the decrypted scrambled content;
and determining the original clear stream content of the stream media with the distributor watermark and the playing terminal watermark according to the decrypted scrambled content and the decrypted descrambled content.
2. The method as claimed in claim 1, wherein the adding a publisher watermark to the scrambled content, encrypting the scrambled content with the publisher watermark by the publisher, and determining the encrypted scrambled content specifically comprises:
adding information of a distributor to a distribution master plate containing the scrambled content in the form of digital watermark by using a digital copyright protection technology;
after the issuing master plate is encrypted in a symmetric encryption mode, an issuing plate ciphertext is determined; the release ciphertext is the encrypted scrambled content.
3. The method as claimed in claim 2, wherein the method for protecting scrambled content of copyright of streaming media content, further comprises the steps of adding a watermark of a play terminal to the descrambled content, encrypting the descrambled content with the watermark of the play terminal, and determining the encrypted descrambled content, and then:
while generating the encrypted descrambling content, acquiring a descrambling content ciphertext;
determining a descrambling content key according to the descrambling content metadata by combining a terminal certificate;
determining a descrambling content key file according to the descrambling content key and the encrypted descrambling content;
and sending the descrambling content cipher text and the descrambling content key file to a playing terminal.
4. The method as claimed in claim 3, wherein the determining of the original clear stream content of the streaming media with the publisher watermark and the broadcast terminal watermark according to the decrypted scrambled content and the decrypted descrambled content specifically comprises:
decrypting the descrambling content ciphertext according to the descrambling content key file, and determining the decrypted descrambling content and the decrypted descrambling content metadata;
and determining the original clear stream content of the streaming media with the distributor watermark and the playing terminal watermark according to the decrypted scrambled content, the decrypted descrambled content and the decrypted descrambled content metadata.
5. The method as claimed in claim 4, wherein the decrypting the descrambled content ciphertext according to the descrambled content key file to determine the descrambled content after decryption and the descrambled content metadata after decryption includes:
acquiring a public key of the playing terminal, and performing asymmetric encryption operation on the encrypted descrambled content by using the public key in combination with the descrambled content key to determine a descrambled content key file; the descrambling content cipher text and the descrambling content key file are transmitted to a playing terminal in real time when the terminal plays through a network;
acquiring a private key of the playing terminal, decrypting the descrambling content key file by using the private key, and determining the decrypted descrambling content metadata and a decryption key of the descrambling content ciphertext;
and decrypting the descrambling content ciphertext according to the decryption key of the descrambling content ciphertext to determine the decrypted descrambling content.
6. A content scrambling protection system for copyright of streaming media content, comprising:
the system comprises a streaming media original clear stream content acquisition module, a clear stream content acquisition module and a clear stream content acquisition module, wherein the streaming media original clear stream content acquisition module is used for acquiring streaming media original clear stream content;
a scrambled content, descrambled content and descrambled content metadata determination module, configured to perform interference processing on the original clear stream content of the streaming media by using an interference generator, and determine the scrambled content, descrambled content and descrambled content metadata; the metadata of the descrambled content is the relationship data among the descrambled content, the scrambled content and the original clear stream content of the streaming media;
the encrypted scrambled content determining module is used for adding an issuer watermark to the scrambled content, encrypting the scrambled content with the issuer watermark by the issuer and determining the encrypted scrambled content;
the encrypted descrambling content determining module is used for adding a playing terminal watermark to the descrambling content, encrypting the descrambling content with the playing terminal watermark and determining the encrypted descrambling content;
the decrypted descrambling content determining module is used for sending the encrypted scrambling content and the encrypted descrambling content to a playing terminal, and the playing terminal decrypts the encrypted descrambling content by combining the descrambling content metadata to determine the decrypted descrambling content; the issuer sends the encrypted scrambled content to a playing terminal in the streaming media issuing process, and the copyright side sends the encrypted descrambled content to the playing terminal in real time in the streaming media playing stage;
the decrypted scrambled content determining module is used for decrypting the encrypted scrambled content by the playing terminal and determining the decrypted scrambled content;
and the streaming media original clear stream content determining module is used for determining the streaming media original clear stream content with the issuer watermark and the playing terminal watermark according to the decrypted scrambled content and the decrypted descrambled content.
7. The content scrambling protection system for copyright of streaming media content as claimed in claim 6, wherein the encrypted scrambled content determination module specifically comprises:
a watermark adding unit, which is used for adding the information of the issuer to the issuing mother plate containing the scrambled content in the form of digital watermark by using the digital copyright protection technology;
the encrypted scrambled content determining unit is used for determining an issuing version ciphertext after encrypting the issuing master version in a symmetric encryption mode; the release ciphertext is the encrypted scrambled content.
8. The content scrambling protection system for copyright of streaming media content as claimed in claim 7, further comprising:
a descrambling content ciphertext acquisition module, configured to acquire a descrambling content ciphertext while generating the encrypted descrambling content;
a descrambling content key determining module, configured to determine a descrambling content key according to the descrambling content metadata in combination with the terminal certificate;
a descrambled content key file determining module, configured to determine a descrambled content key file according to the descrambled content key and the encrypted descrambled content;
and the sending module is used for sending the descrambling content cipher text and the descrambling content key file to a playing terminal.
9. The content scrambling protection system for copyright of streaming media content as claimed in claim 8, wherein the module for determining original clear streaming content of streaming media with publisher watermark and playing terminal watermark comprises:
the decrypted descrambling content and decrypted descrambling content metadata determining unit is used for decrypting the descrambling content ciphertext according to the descrambling content key file and determining the decrypted descrambling content and decrypted descrambling content metadata;
and the original clear stream content determining unit of the streaming media with the publisher watermarks and the playing terminal watermarks is used for determining the original clear stream content of the streaming media with the publisher watermarks and the playing terminal watermarks according to the decrypted scrambled content, the decrypted descrambled content and the decrypted descrambled content metadata.
10. The content scrambling protection system for copyright of streaming media content as claimed in claim 9, wherein the decrypted descrambled content and decrypted descrambled content metadata determining unit specifically includes:
a descrambled content key file determining subunit, configured to obtain a public key of the playback terminal, and perform asymmetric encryption operation on the encrypted descrambled content by using the public key in combination with the descrambled content key to determine a descrambled content key file; the descrambling content cipher text and the descrambling content key file are transmitted to a playing terminal in real time when the terminal plays through a network;
the decrypted descrambling content metadata determining subunit is used for acquiring a private key of the playing terminal, decrypting the descrambling content key file by using the private key and determining the decrypted descrambling content metadata and a decryption key of the descrambling content ciphertext;
and the decrypted descrambling content determining subunit is used for decrypting the descrambling content ciphertext according to the decryption key of the descrambling content ciphertext and determining the decrypted descrambling content.
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