CN107018432B - Media content licensing method and device - Google Patents
Media content licensing method and device Download PDFInfo
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- CN107018432B CN107018432B CN201710194159.5A CN201710194159A CN107018432B CN 107018432 B CN107018432 B CN 107018432B CN 201710194159 A CN201710194159 A CN 201710194159A CN 107018432 B CN107018432 B CN 107018432B
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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
- H04N21/262—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists
- H04N21/26208—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists the scheduling operation being performed under constraints
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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
- H04N21/26606—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 entitlement messages, e.g. Entitlement Control Message [ECM] or Entitlement Management Message [EMM]
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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
- H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
- H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
- H04N21/4623—Processing of entitlement messages, e.g. ECM [Entitlement Control Message] or EMM [Entitlement Management Message]
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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
- H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
- H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
- H04N21/4627—Rights management associated to the content
Abstract
The embodiment of the application provides a media content permission method and equipment based on a block chain technology, in the media content permission method, a block chain node receives a media content permission request sent by a sending end, and the media content permission request comprises media content identification information and user identification information; and the block link point returns a temporary permission to the sending end according to the media content identification information and the user identification information, wherein the temporary permission comprises a decryption key and a temporary permission time of the media content. The media content permission control method realizes the decentralized media content permission control mechanism by introducing the block chain technology.
Description
Technical Field
The present application relates to copyright management technologies, and in particular, to a method and an apparatus for licensing media content.
Background
Currently, the internet has become an important video content distribution medium. The internet has stronger advantages in the aspects of quantity, updating speed and the like compared with the traditional media, and more audiences watch the film and television works on line. Meanwhile, the convenience of the Internet brings troubles in the aspect of copyright protection to copyright owners of film and television works and audio and video broadcasting platforms. Under the internet environment, how to protect the copyright of film and television works, establish a healthy and ordered audio and video industry authorization chain, reduce the legal risk of an audio and video broadcasting platform, and the like are problems to be solved urgently.
The conventional video content copyright protection technology is usually based on a cryptology theory, and the mode is that a video file stream is encrypted into a ciphertext by using a secret key, so that unauthorized user equipment cannot analyze video content. After the user finishes online ordering, the user equipment requests a key from the key management system, the key management system returns key information to the user equipment after finishing user identity authentication, and the user equipment decrypts the encrypted video file by using the key information and watches the video content.
The current technical architecture adopts a centralized key management mechanism, and once the key management system is attacked, the whole video system cannot work normally.
Disclosure of Invention
In view of the above, the present disclosure provides a method and an apparatus for media content licensing based on a block chain technique.
In a first aspect, a method for licensing media content is provided, which includes:
the method comprises the steps that a block link node receives a media content permission request sent by a client, wherein the media content permission request comprises media content identification information and user identification information, the client can be the client or a media content distribution system, the user identification information can be a user ID and/or a device ID, the content identification information can be a content ID and/or a content key ID, and the authorization request can also further comprise: other device information, such as a public key, a device certificate, superior certificate information, a superior certificate signing the current certificate, etc.
And the block chain node returns a temporary permission to the client according to the media content identification information and the user identification information, wherein the temporary permission comprises a decryption key of the media content and a temporary permission time, and the temporary permission time can be the valid time of the decryption key. The method realizes the decentralized media content permission control mechanism by introducing a block chain mechanism,
optionally, the method further includes: the block link point determines that the user authorization information corresponding to the media content identification information and the user identification information is not stored;
and the block link point acquires the ordering record information of the media content of the user from a media content distribution system according to the media content identification information and the user identification information, and generates the temporary permission according to the ordering record information. Specifically, the block link node may query the ordering record information of the media content of the user through an ordering record query interface between the block link node and the media content distribution system, and if the media content distribution system determines that there is an ordering record of the media content by the user, the block link node may generate a temporary authorization according to the ordering record. The method can ensure that the user can watch the media content after successfully ordering the media content, and reduce the problem that the user needs to wait for experience due to the overlong writing process of the block chain user authorization information.
Optionally, the method further includes:
receiving a media content permission request sent by the client again, wherein the media content permission request comprises media content identification information and user identification information;
determining that user authorization information corresponding to the media content identification information and the user identification information is stored according to the media content identification and the user identification information;
generating a formal license according to the user authorization information, wherein the formal license comprises a decryption key of the media content;
and returning the formal license to the client.
Optionally, the method further includes:
and receiving a user authorization information writing request sent by the media content distribution system, and writing the user authorization information into the block chain node. Wherein writing the user authorization information into the block chain comprises: selecting any block chain node, and applying for writing user authorization information into the block chain node; the block chain link point initiates a block chain writing process of user authorization records; and the block chain link point initiates a consensus process to other nodes in the network, and when the block chain link points meeting the quantity condition in the network reach the agreement of the user ordering record, the user ordering record is stored.
In a second aspect, a method for licensing media content is provided, which is applied to a client, and includes:
sending a media content permission request to a block link node, the media content permission request including media content identification information and user identification information;
and receiving a temporary permission returned by the block link point according to the media content identification information and the user identification information, wherein the temporary permission comprises a decryption key and a temporary permission time of the media content.
Optionally, the method further includes:
sending the media content ordering request to a media content distribution system, wherein the media content ordering request comprises a media content identifier and user identifier information;
and receiving a media content ordering response returned by the content distribution system and encrypted media content corresponding to the media content identification.
Optionally, the method further includes:
re-sending a media content license request to the chunk link node before the temporary license time expires, the media content license request including identification information of the media content and user identification information;
and receiving a formal license returned by the blockchain node, wherein the formal license comprises a decryption key of the media content.
Optionally, the encrypted media content is a part of the media content. The time length for returning the encryption stream needs to be set according to the block chain writing performance, that is, a certain margin is added on the basis of the block chain writing completion time, and if the current block chain writing process needs 10 minutes and the margin is set to be 5 minutes, the encryption stream of 15 minutes is returned. In the mode, the pushing of the residual video stream is carried out when the client side obtains the formal license, so that the situation that the client side is attacked and then the watching of the complete video content is realized by continuously applying the temporary license is prevented.
In a third aspect, there is also provided a method for licensing media content, including:
a media content distribution system receives a media content permission request sent by a client, wherein the media content permission request comprises media content identification information and user identification information;
and the media content distribution system returns a temporary license to the client according to the media content identification information and the user identification information, wherein the temporary license comprises a decryption key and temporary license time of the media content.
Optionally, the method further includes:
the media content distribution system receives a media content ordering request sent by a client, wherein the media content ordering request comprises a media content identifier and user identifier information;
and returning a media content ordering response and encrypted media content corresponding to the media content identification to the client, wherein the encrypted media content can be all media content or part of the media content.
Optionally, when the media content subscription response and the encrypted media content are returned to the client, the method further includes:
the media content distribution system applies for writing user authorization information into the blockchain to the blockchain link points.
Optionally, before returning the temporary license to the client, the method further includes:
a media content distribution system sends a temporary permission request and a subscription record of the media content of the user to a block chain node, wherein the subscription record of the media content of the user can be sent actively or sent after receiving a request of the block chain node;
the media content distribution system receives temporary permission returned by the block link point according to the ordering record of the media content of the user.
Optionally, the method further includes:
before the temporary permission expires, receiving a media content permission request sent by the client again, wherein the media content permission request contains the media content identification and the user identification information;
sending a formal permission request to the block chain key management node, wherein the formal permission request comprises a media content identifier and user identifier information;
receiving a formal license returned by the blockchain node, wherein the formal license comprises a decryption key of the media content;
and returning the formal license to the client.
In the method, the client does not directly apply for the media content permission from the block chain link point, but applies for the media content permission through the media content distribution system, so that the malicious client can be prevented from attacking the block chain link node.
In a fourth aspect, there is provided a block link point comprising:
the receiver is used for receiving a media content permission request sent by a client, wherein the media content permission request comprises media content identification information and user identification information;
a transmitter, configured to return a temporary license to the client according to the media content identification information and the user identification information, where the temporary license includes a decryption key of the media content and a temporary license time.
Optionally, the block chain node further includes:
a processor configured to determine that the blockchain node does not store user authorization information corresponding to the media content identification information and the user identification information; and acquiring ordering record information of the media content of the user from a media content distribution system according to the media content identification information and the user identification information, and generating the temporary permission according to the ordering record information.
Optionally, the receiver is further configured to receive a media content permission request sent by the client again, where the media content permission request includes media content identification information and user identification information;
the processor is further configured to determine that the block link point stores user authorization information corresponding to the media content identification information and the user identification information, and generate a formal license according to the user authorization information, where the formal license includes a decryption key of the media content;
the transmitter is further configured to return a formal license to the client.
In a fifth aspect, a client device is provided, including:
a transmitter for transmitting a media content permission request to a chunk link node, the media content permission request including media content identification information and user identification information;
a receiver, configured to receive a temporary license returned by the chunk link node according to the media content identification information and the user identification information, where the temporary license includes a decryption key and a temporary license time of the media content.
Optionally, the transmitter further transmits the media content subscription request to a media content distribution system, where the media content subscription request includes a media content identifier and user identification information;
the receiver also receives a media content ordering response returned by the content distribution system and encrypted media content corresponding to the media content identification.
Optionally, before the temporary license time expires, the sender further sends a media content license request to the blockchain node, the media content license request including identification information of the media content and identification information of the user;
the receiver also receives a formal license returned by the blockchain node, the formal license including a decryption key for the media content.
Optionally, the encrypted media content received by the receiver is part of the media content.
In a sixth aspect, there is also provided a media content distribution system, comprising:
the receiver is used for receiving a media content permission request sent by a client, wherein the media content permission request comprises media content identification information and user identification information;
a transmitter, configured to return a temporary license to the client according to the media content identification information and the user identification information, where the temporary license includes a decryption key of the media content and a temporary license time.
Optionally, the receiver is further configured to receive a media content subscription request sent by a client, where the media content subscription request includes a media content identifier and user identifier information;
the transmitter is further configured to return a media content ordering response and encrypted media content corresponding to the media content identifier to the client.
Optionally, when the transmitter returns the media content subscription response and the encrypted media content to the client,
the transmitter also applies to the block link points for writing user authorization records into the block chain.
Optionally, the transmitter further transmits a temporary permission request and a subscription record of the media content of the user to a chunk link node;
the receiver is further configured to receive a temporary grant returned by the chunk link point according to a subscription record of the media content of the user.
Optionally, before the temporary license expires, the receiver further receives a media content license request sent by the client again, where the media content license request includes the media content identifier and the user identifier information;
the transmitter further sends a formal license request to the blockchain key management node, the formal license request including media content identification and user identification information;
the receiver further receives a formal license returned by the blockchain node, the formal license containing a decryption key for the media content;
the sender returns the formal license to the client.
In a seventh aspect, a block chain node is further provided, where the block chain node includes:
the authorization management module is used for receiving a media content permission request sent by a client, wherein the media content permission request comprises media content identification information and user identification information; and returning a temporary license to the client according to the media content identification information and the user identification information, wherein the temporary license comprises a decryption key of the media content and temporary license time.
Optionally, the block chain node further includes:
the user management module is used for determining that the user authorization information corresponding to the media content identification information and the user identification information is not recorded locally;
the authorization management module is further configured to obtain subscription record information of the media content of the user from a media content distribution system according to the media content identification information and the user identification information based on the determination result of the user management module, and generate the temporary license according to the subscription record information.
Optionally, the authorization management module is further configured to receive a media content permission request sent by the client again, where the media content permission request includes media content identification information and user identification information;
the user management module is further configured to determine that user authorization information corresponding to the media content identification information and the user identification information is locally recorded;
and the authorization management module generates formal license according to the user authorization information based on the determination result of the user management module, and returns the formal license to the client, wherein the formal license comprises a decryption key of the media content.
In an eighth aspect, there is provided a block link point comprising: comprising a memory for storing computer executable program code and a processor for executing the executable program code in the memory;
wherein the program code comprises instructions which, when executed by the processor, cause the block link points to perform a method of licensing media content as described in the above aspect.
In a ninth aspect, there is provided a media content distribution system comprising: comprising a memory for storing computer executable program code and a processor for executing the executable program code in the memory;
wherein the program code comprises instructions which, when executed by the processor, cause the media content distribution system to perform the method of licensing media content as described in the above aspect.
In a tenth aspect, there is provided a client apparatus comprising: comprising a memory for storing computer executable program code and a processor for executing the executable program code in the memory;
wherein the program code comprises instructions which, when executed by the processor, cause the client device to perform the method of licensing media content as described in the above aspect.
In an eleventh aspect, there is provided a computer program product comprising executable program code, wherein the program code comprises instructions which, when executed by the processor, cause the blockchain node, media content distribution system, client device to perform the method of licensing media content as described in the above aspect.
In a twelfth aspect, embodiments of the present application provide a computer storage medium for storing computer software instructions for the above blockchain node, media content distribution system, and client device, which includes a program designed to execute the above aspects.
In the method for licensing media content according to the present embodiment, a blockchain technique is introduced, so that a decentralized media content license control mechanism is implemented. The block chain is a distributed database system participated by a plurality of nodes, and is characterized in that the user authorization record recorded in the block can not be changed and forged, the user authorization record is stored by each block chain node, even if any block chain node is attacked, the whole licensing process can not be influenced, and the security of media content licensing is ensured.
Drawings
Fig. 1 is a system architecture diagram of a licensing method for media content implementation of an embodiment of the present application;
FIG. 2 is a flow chart of a media content licensing method interaction of an embodiment of the present application;
FIG. 3 is a flow diagram of a media content licensing method interaction of another embodiment of the present application;
FIG. 4 is a flow diagram of a media content licensing method interaction of yet another embodiment of the present application;
fig. 5 is a block diagram of a network device implemented by a media content licensing method according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
Fig. 1 is a system architecture diagram of an implementation of a licensing method for media content according to an embodiment of the present application, and as shown in fig. 1, the system includes a blockchain key management node 110, a media content distribution system 120, a client 130, and an encoder 130. The blockchain management node is mainly responsible for key management, user information management, authorization management, and the like, the media content distribution system is responsible for ordering and distributing media content, the client 130 is used for playing media content, and the encoder is mainly responsible for encrypting and encoding media content. In the present system, as shown in fig. 1, the blockchain management node can be functionally divided into a key management module 111, a user management module 112, an authorization management module 113, and a blockchain writing module 114. The main functions of the modules are described as follows:
the key management module 111: the module is mainly responsible for managing and storing key information, providing a key to the encoder 104 to encrypt media content, generating an encrypted media stream, and returning the key information to the authorization management module in the authorization process.
The user management module 112: the module is mainly responsible for managing and storing user information and providing inquiry and write-in block chains of user authorization records externally.
The authorization management module 113: the module is mainly responsible for responding to a media content permission request of the terminal equipment, and in the scheme of the application, the module not only interacts with the terminal equipment, but also completes the verification of online subscription through a user subscription record verification interface.
The block chain write module 114: the method is mainly responsible for writing user authorization records into a block chain, initiating a consensus process in a block chain network, and writing the user authorization records into the block chain after the consensus is achieved.
It should be noted that the blockchain key management node 110 in the embodiment of the present application is named according to its function in the embodiment of the present application, and the blockchain key management node 110 is substantially a common blockchain link point in the blockchain network. It is noted that in this application, where granted, and granted, the two words are used interchangeably.
Fig. 2 is an interaction flowchart of a media content licensing method according to a first embodiment of the present application, and as shown in fig. 2, the media content licensing method includes:
step 201: a user initiates a media content subscription request to the media content distribution system 120 through the client 110.
It should be noted that the media content may be video, audio, pictures, books, etc.
Step 202: the media content distribution system 120 completes the process of the user content ordering request, and then selects a node in the blockchain network and applies to the user management module 112 of the node to write the user authorization record into the blockchain for storage.
Step 203: the user management module 112 calls the blockchain writing module 114 to initiate a blockchain writing process of the user authorization record.
Step 204: the block chain writing module 114 initiates a consensus process to all other nodes in the network, where the consensus process includes validity check of the user authorization record, and when a node meeting the quantity condition in the network agrees with the user subscription record, the user authorization record is considered to be valid, and the record is written into the data of the node for storage.
Step 205: the blockchain write module 114 returns the write result to the user management module 112 after completing the write process.
Step 206: the user management module 112 returns a user authorization record write success response to the media content distribution system 120.
Step 207: the media content distribution system 120 returns a subscription success response message to the client 130 along with the encrypted media stream.
Step 208: the client 130 obtains the key identification information in the media stream, and performs a play permission query locally, the play permission includes the key information of the corresponding media content encrypted file, if the play permission exists locally, the encrypted media stream is directly decrypted for playing; otherwise proceed to step 209.
Step 209: the client 130 transmits a content license request message to the authorization management module 113.
Step 210: the authorization management module 113 checks the legitimacy of the request and verifies the legitimacy of the device based on the device certificate in the request.
Step 211: the authorization management module 113 initiates a user authorization record query request to the user management module 112.
Step 212: the user management module 112 queries the blockchain for the corresponding user authorization record.
Step 213: the user management module 112 returns the user authorization record query result to the authorization management module 113.
Step 214: the authorization management module 113 checks the user authorization record query result, and if the current user authorization record is legal, step 215 is performed, otherwise, a permission request failure message is returned to the client 130.
Step 215: the authorization management module 113 transmits key request information to the key management module 111.
Step 216: the key management module 111 returns key information of the corresponding media content to the entitlement management module 113.
Step 217: the authorization management module 113 generates a license based on the returned key information.
Step 218: the authorization management module 113 returns the generated license to the client 130.
Step 219: after receiving the license and analyzing the key, the client 130 decrypts and plays the encrypted media stream.
In the method for licensing media content according to the present embodiment, a blockchain technique is introduced, so that a decentralized media content license control mechanism is implemented. The block chain is a distributed database system participated by a plurality of nodes, and is characterized in that the user authorization record recorded in the block can not be changed and forged, the user authorization record is stored by each block chain node, even if any block chain node is attacked, the whole licensing process can not be influenced, and the security of media content licensing is ensured.
For a scene that a user orders media content online, after a block chain technology is applied, after a client and a video distribution system complete a media content ordering process, an ordering success response and encrypted media stream cannot be immediately returned to the client, but an ordering success response and a media stream cannot be returned to the client after a block chain system completes writing of a corresponding user authorization record into a block chain.
Therefore, in the second embodiment of the present application, the media content distribution system returns an order success message to the client while applying for writing the user authorization record into the blockchain after completing the user order request processing, and does not need to wait for the user management module to return a blockchain write success response.
And a user ordering record checking interface of the media content distribution system and the authorization management module is added, and the authorization management module initiates a user ordering checking request to the media content distribution system through the interface when the user authorization record is unsuccessfully inquired.
And a transitional temporary authorization distribution mechanism is added, the authorization management module sets a temporary authorization validity period according to the writing time of the user authorization information of the block chain, and the client initiates a formal authorization request again after the validity period is reached.
Fig. 3 is an interaction flowchart of a media content licensing method according to a second embodiment of the present application, and as shown in fig. 3, the media content licensing method includes:
step 301: a user initiates a media content subscription request to the media content distribution system 120 through the client 130.
Step 302: after completing the process of the media content ordering request of the user, the media content distribution system 120 proceeds to step 303, and executes a block chain writing process, where the block chain writing process includes:
302a, selecting a node in the block chain network and applying for writing the user authorization record into the block chain for storage to the user management module 112 of the node;
302b, the user management module 112 calls the blockchain writing module 114 to initiate a blockchain writing process of the user authorization record;
302c, the blockchain writing module 114 initiates a consensus process to all other nodes in the network, where the consensus process includes a validity check on the user authorization record, and when a node meeting a quantity condition in the network agrees with the user subscription record, the user authorization record is considered to be valid and the record is written into the data of the node for storage.
It should be noted that, in the present embodiment, the above process and the subsequent processing process are performed synchronously, that is, the subsequent steps do not need to be executed after the above process is finished.
Step 303: the media content distribution system 120 returns a subscription success response message to the client 130 along with the encrypted media stream.
It should be noted that the returned encrypted media stream may be the entire media stream of the media content, or may be a partial media stream, such as a media stream that returns only 10 minutes according to the block chain writing time.
Step 304: the client 130 obtains the key identifier in the media stream and searches for a playing license locally, the playing license contains the key information of the corresponding media content encrypted file, and if the playing license exists locally, the encrypted media stream is directly decrypted according to the local key; otherwise, go to step 305.
Step 305: the client 130 sends a license request message to the authorization management module 113, where the message carries one or more of the following information:
device information: public key, device certificate, superior certificate information, superior certificate signature on current certificate, etc.;
user identification information: device identification or subscriber identification
The media content information: content identification or content key identification, etc
It should be noted that the present embodiment is not limited to the above information, and other information may be added on the basis of the present solution.
Step 306: the authorization management module 113 checks the validity of the request, including: and verifying the integrity of the message structure and the validity of the field data, and verifying the validity of the equipment according to the equipment certificate in the request.
Step 307: the authorization management module 113 initiates a user authorization record query request to the user management module 112, where the request message needs to carry a device identifier, a content identifier, and the like.
The embodiment is not limited to only containing the above information.
Step 308: the user management module 112 queries the user identifier bound to the device in the blockchain according to the device identifier, queries the corresponding user authorization record according to the user identifier and the content identifier, and includes the user identifier information in the query result.
The embodiment is not limited to only containing the above information.
Step 309: the user management module 112 returns the user authorization record query result to the authorization management module 113.
Step 310: the authorization management module 113 checks the user authorization record query result, and if the user authorization record query result is empty, the process proceeds to step 311.
Step 311: the authorization management module 113 initiates a user subscription record verification request to the media content distribution system 120, where the request message needs to carry a device identifier, a content identifier, a user identifier, and the like.
The embodiment is not limited to only containing the above information.
Step 312: the media content distribution system 120 queries the user ordering record information according to the device identifier, the content identifier, and the user identifier, and returns the corresponding user ordering record information and the certificate information of the media content distribution system to the authorization management module 113.
The embodiment is not limited to only containing the above information.
Step 313: the authorization management module 113 verifies the certificate of the video distribution system, and verifies the corresponding user subscription record information after the verification is passed.
Step 314: after the user subscription record passes verification, the authorization management module 113 sends temporary key request information to the key management module 111, where the request information needs to carry a key identifier and a permission request type identifier field, which indicates that the request is a temporary key request message.
Step 315: after the key management module 111 parses the request message, it searches for the key information according to the key identifier, and then sets the validity period of the temporary key according to the block chain write performance, that is, a certain margin is added on the basis of the block chain write completion time, if the current block chain write process needs 10 minutes and the margin is set to 5 minutes, the validity period of the temporary key is 15 minutes, it should be noted that the above example is only a specific example of the present embodiment, and other setting conditions on the basis of the present solution should belong to the modifications of the present solution, and are also within the protection range.
Step 316: the key management module 111 returns temporary key information to the authorization management module.
Step 317: the authorization management module 113 generates a temporary license from the returned temporary key information.
Step 318: the authorization management module 113 returns the generated temporary license to the client 130.
Step 319: after receiving the temporary license message and parsing out the key, the client 130 decrypts the currently received encrypted stream, and starts a temporary license validity period detection process, where when the temporary license validity period is about to expire, such as 14 minutes, this number is merely an example, and other configurations based on this solution should also belong to the protection scope of this application, and the client 130 starts a formal license request. It should be noted that in this embodiment, the temporary license includes a valid period of the temporary license, and once the valid period expires, the temporary license is invalidated, and the client cannot continue to use the decryption key of the temporary license.
Step 320: the client 130 initiates formal license request information to the authorization management module 113.
The processing procedure from step 321 to step 325 is the same as that from step 306 to step 310, and is not described herein again.
Step 326: after the user authorization record is verified, the authorization management module 113 sends formal key request information to the key management module 11, where the request information needs to carry a key identifier and a subscription relationship, and the subscription relationship is used to indicate the valid viewing time of the user for the content (determined according to the user subscription type), and simultaneously carries a permission request type identifier field to indicate that the request is a formal key request message.
Step 327: after the key management module 111 parses the request message, it searches for the key information according to the key identifier, and sets the validity period of the key according to the ordering relationship, and generates the formal key information.
Step 328: the key management module 111 formally returns the key information to the authorization management module 113.
Step 329: the authorization management module 113 generates a formal license message based on the returned formal key information.
Step 330: the authorization management module 113 returns the generated formal license message to the client 130.
The main improvement points in the above process are as follows: step 302, step 303 are processed in parallel, step 303 can be executed without waiting for steps 302a-302c to be completed; meanwhile, a temporary license mechanism is introduced, the validity period of the temporary license is set according to the writing performance of the block chain, a user subscription record verification interface between the authorization management module 113 and the media distribution system 120 is added, and the client 130 adds a processing mechanism for the temporary license.
It should be noted that, in this embodiment, the temporary key information is different from the formal key information in terms of validity periods, the temporary key has a validity period time limit, and the formal key has no validity period time limit.
According to the media content licensing method, the temporary licensing mechanism is introduced, so that the user can play the content after finishing ordering the media content, long waiting time is not needed, and the use experience of the user is improved.
It should be noted that in this embodiment, the client 130 may also apply for permission from the chunk link point 110 via the media content distribution system 120.
Fig. 4 is an interaction flowchart of a media content licensing method according to a third embodiment of the present application, in this embodiment, a media content distribution system directly receives a licensing request from a client, as shown in fig. 4, the media content licensing method includes:
steps 401 through 402 are the same as step 301 through 302 in the embodiment, and are not described herein again.
Step 403: the media distribution system 120 returns a successful subscription response message to the client 130, and simultaneously returns an encrypted media stream, where the returned encrypted media stream may be all media streams of the media content or a partial media stream, in this embodiment, a partial encrypted stream is returned, and a time length for returning the encrypted stream needs to be set according to the block chain write performance, that is, a certain margin is added on the basis of the block chain write completion time, and if the current block chain write process needs 10 minutes and the margin is set to 5 minutes, an encrypted stream of 15 minutes is returned.
It should be noted that the above example is only a specific example of the present application, and other setting conditions based on the present solution should belong to the modifications of the present solution and also fall within the protection scope.
The processing procedure in step 404-4032 is basically the same as that in the second embodiment, except that the client applies for the license through the media content distribution system, and does not apply for the license directly from the authorization management system, which is not described herein again.
Step 433: the authorization management module returns the generated formal license message to the media distribution system.
Step 434: the media distribution system returns the generated formal license to the client and starts to push the rest encrypted stream to the client.
The main improvement points in the above process are as follows: in step 403, duration constraint is also performed on the temporarily returned encrypted video stream, and in step 434, when the client obtains formal permission, pushing of the remaining video stream is performed, so that the situation that the client continuously applies for the temporary permission to realize complete video content viewing after being attacked can be prevented.
Fig. 5 is a schematic block diagram of a network device 500 implemented by the media content licensing method of the present application. The apparatus 500 may comprise a plurality of ingress ports 510 and/or a receiver unit (Rx)520 for receiving data; a logic unit or processor 530 for processing signals; a plurality of egress ports 540 and/or a transmitter unit (Tx)550 for transmitting data to other components; and a memory 560. The apparatus 500 may be adapted to implement any of the disclosed features, methods, and apparatus as described above. For example, the device 500 may be adapted to implement a blockchain key management node, a client and a media content distribution system, as well as a licensing method for media content as described above.
The memory 560 may be comprised of one or more magnetic disks, magnetic tape drives, optical disk drives, or solid state drives; non-volatile storage available for data and as an overflow data storage device; may be used to store programs when such programs are selected for execution; and may be used to store instructions and data that are read during program execution. The memory 560 may be volatile and/or nonvolatile and may be Read Only Memory (ROM), Random Access Memory (RAM), Ternary Content Addressable Memory (TCAM), Static Random Access Memory (SRAM), other suitable memory types, or any combination thereof. Such as: the memory 560 may include an entitlement management module, a user management module, a key management module, and a blockchain write module as shown in fig. 1, which may be adapted to implement a blockchain key management node.
Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described in a functional general in the foregoing description for the purpose of illustrating clearly the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may also be an electric, mechanical or other form of connection.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiments of the present application.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially or partially contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
While the invention has been described with reference to specific embodiments, the scope of the invention is not limited thereto, and those skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the invention. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (11)
1. A method for licensing media content, comprising:
the method comprises the steps that a block chain node receives a media content permission request sent by a client, wherein the media content permission request comprises media content identification information and user identification information;
the block link point determines that the user authorization information corresponding to the media content identification information and the user identification information is not stored;
the block link point acquires ordering record information of the media content of the user from a media content distribution system according to the media content identification information and the user identification information, and generates a temporary permission according to the ordering record information;
the blockchain node returns the temporary license to the client, the temporary license including a decryption key for the media content and a temporary license time.
2. The licensing method of claim 1, wherein the method further comprises:
receiving a media content permission request sent by the client again, wherein the media content permission request comprises media content identification information and user identification information;
determining that user authorization information corresponding to the media content identification information and the user identification information is stored according to the media content identification and the user identification information;
generating a formal license according to the user authorization information, wherein the formal license comprises a decryption key of the media content;
and returning the formal license to the client.
3. The licensing method of claim 1 or 2, further comprising:
and receiving a user authorization information writing request sent by the media content distribution system, and writing the user authorization information into the block chain node.
4. A method for licensing media content, comprising:
a client sends a media content permission request to a block link node, wherein the media content permission request comprises media content identification information and user identification information;
the block chain node determines that the user authorization information corresponding to the media content identification information and the user identification information is not stored according to the received media content permission request;
the block link point acquires ordering record information of the media content of the user from a media content distribution system according to the media content identification information and the user identification information, and generates a temporary permission according to the ordering record information;
the blockchain node returns the temporary license to the client, the temporary license including a decryption key for the media content and a temporary license time.
5. The licensing method of claim 4, wherein the method further comprises:
the client sends a media content ordering request to the media content distribution system, wherein the media content ordering request comprises a media content identifier and user identifier information;
and the client receives a media content ordering response returned by the media content distribution system and encrypted media content corresponding to the media content identification.
6. The licensing method of claim 4 or 5, wherein the method further comprises:
and the block chain node receives a user authorization information writing request sent by the media content distribution system and writes the user authorization information into the block chain node.
7. The licensing method of claim 6, wherein the method further comprises:
the client sends a media content permission request to the block link node again before the temporary permission time expires, wherein the media content permission request comprises identification information and user identification information of the media content;
the block chain link point generates formal license according to the user authorization information corresponding to the identification information and the user identification information of the media content, wherein the formal license comprises a decryption key of the media content;
and the client receives formal permission returned by the blockchain node.
8. The licensing method of claim 5, wherein the encrypted media content is a partial content of the media content.
9. A block link point, comprising:
the receiver is used for receiving a media content permission request sent by a client, wherein the media content permission request comprises media content identification information and user identification information;
a processor to: determining that the blockchain node does not store user authorization information corresponding to the media content identification information and the user identification information; acquiring ordering record information of the media content of the user from a media content distribution system according to the media content identification information and the user identification information, and generating a temporary permission according to the ordering record information;
a transmitter, configured to return the temporary license to the client according to the media content identification information and the user identification information, where the temporary license includes a decryption key of the media content and a temporary license time.
10. A block chain node as claimed in claim 9, wherein the receiver is further configured to re-receive a media content permission request sent by the client, the media content permission request including media content identification information and user identification information;
the processor is further configured to determine that the block link point stores user authorization information corresponding to the media content identification information and the user identification information, and generate a formal license according to the user authorization information, where the formal license includes a decryption key of the media content;
the transmitter is further configured to return the formal license to the client.
11. A system for licensing media content, comprising a blockchain node for performing the method performed by the blockchain node in the method of any of the preceding claims 4 to 8, and a client for performing the method performed by the client in the method of any of the preceding claims 4 to 8.
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| PCT/CN2018/078430 WO2018177110A1 (en) | 2017-03-28 | 2018-03-08 | Media content licensing method and device |
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| CN201710194159.5A CN107018432B (en) | 2017-03-28 | 2017-03-28 | Media content licensing method and device |
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