CN110324682A - VOD method and system based on block chain - Google Patents
VOD method and system based on block chain Download PDFInfo
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- CN110324682A CN110324682A CN201910623759.8A CN201910623759A CN110324682A CN 110324682 A CN110324682 A CN 110324682A CN 201910623759 A CN201910623759 A CN 201910623759A CN 110324682 A CN110324682 A CN 110324682A
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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]
- H04N21/40—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
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
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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
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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
- H04N21/8352—Generation of protective data, e.g. certificates involving content or source identification data, e.g. Unique Material Identifier [UMID]
-
- 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
- H04N21/845—Structuring of content, e.g. decomposing content into time segments
- H04N21/8456—Structuring of content, e.g. decomposing content into time segments by decomposing the content in the time domain, e.g. in time segments
Abstract
The invention discloses a kind of VOD method and system based on block chain.The VOD method is applied to playback terminal, which comprises receives the programme content from video server, and obtains the initial overall identification of the programme content；The initial overall identification is the unique identification for the mark programme content that the video server is stored in block chain, the metadata of foundation programme content obtains；Judge whether the initial overall identification is signed by Broadcast Control node；If the signature of the initial overall identification without Broadcast Control node, forbids playing the programme content；If the initial overall identification has the signature of Broadcast Control node, the programme content is played.The VOD method avoids playing the programme content being tampered, and can facilitate subsequent investigation and evidence collection.
Description
Technical field
The present invention relates to technical field of information processing, and in particular to a kind of VOD method based on block chain and is
System.
Background technique
VOD service is liked with the universal depth of mobile terminal by masses.At present video program be IP based network into
Row plays, and after the equipment such as video server (including CDN) are cracked, the content of video program is with regard to easily modified.Work as biography
External optional equipment on the network equipment (such as interchanger) of defeated video program, it is easy to intercept and capture and replace normal video code flow.
In other words, the video program play of IP based network, video program content are easy to be maliciously tampered, and give content quotient and operator
Cause irretrievable loss.
In addition, the content quotient that malice plays violation content is that fainaigue may be sold after the video program being tampered is broadcasted
Program source is ruined, thus the obstacle caused by investigation and evidence obtaining.In addition, certain illegal video servers, in the video for playing violation
After program, program source may be deleted in advance to evade inspection, this causes certain difficulty to the investigation and evidence collection in later period.
Summary of the invention
For this purpose, the present invention provides a kind of VOD method and system based on block chain, with solve in the prior art by
In video program content is tampered and content quotient and operator is caused to lose the problem of.
To achieve the goals above, first aspect present invention provides a kind of VOD method based on block chain, application
In playback terminal, which comprises
The programme content from video server is received, and obtains the initial overall identification of the programme content；It is described first
Beginning overall identification is described in the mark that the video server is stored in block chain, the metadata of foundation programme content obtains
The unique identification of programme content；
Judge whether the initial overall identification is signed by Broadcast Control node；If the initial overall identification is without Broadcast Control node
Signature, then forbid playing the programme content；If the initial overall identification has the signature of Broadcast Control node, the program is played
Content.
Wherein, after the programme content for receiving video server, the section is obtained using the metadata of the programme content
The initial overall identification of mesh content.
It is wherein, described to play the programme content, comprising:
The current block identification of each video block is obtained from the programme content, the video block is the programme content segmentation
Video-frequency band afterwards；The current block identification is the unique identification for identifying video block content；
The corresponding initial block identification of the video block is obtained from the block chain, the initial block identification is the video clothes
Business device is uploaded to the block chain, the mark video block content unique identification；
The current block identification and initial block identification of the video block are compared, if they are the same, is then broadcast after being decoded to the video block
It puts；If it is different, then skipping the video block.
Wherein, when obtaining the corresponding initial block identification of the video block from the block chain for the first time, using described initial
Overall identification all initial block identifications corresponding to the programme content position.
Wherein, the playback terminal is from the block chain by the programme content under corresponding all initial block identifications
It is downloaded to local；Alternatively, locally downloading one by one in real time.
The second aspect of the present invention provides a kind of video providing method based on block chain, is applied to video server, institute
The method of stating includes:
Initial overall identification is obtained according to the metadata of programme content, the initial overall identification is for identifying the section
The unique identification of mesh content；
The programme content is divided into multiple video blocks, and calculates separately the initial block identification of each video block；
The initial overall identification and the initial block identification are independently spliced to acquisition splicing mark；
It is signed to splicing mark and is uploaded to block chain, in order to which playback terminal obtains the initial global mark
After knowledge, check whether the initial overall identification is signed by Broadcast Control node from block chain, broadcasting has the signature initial global mark
Know the corresponding programme content, and forbids playing the corresponding programme content of initial overall identification described in no name.
Wherein, the programme content is divided into multiple video blocks according to period or picture group.
Wherein, it to the splicing identification signature and is uploaded in block chain step described, is broadcast according to the programme content
Splicing mark after signature is continuously uploaded to the block chain by the time sequencing put.
Wherein, it to the splicing identification signature and is uploaded in block chain step described, reaches institute according to upload request
Splicing mark after signature is successively uploaded to the block chain by the sequencing for stating block chain.
The third aspect of the present invention provides a kind of video on-demand system based on block chain, including the connection of block chain network
Video server, Broadcast Control node and playback terminal, wherein
The video server executes video providing method provided by the invention for providing programme content；
The programme content that the Broadcast Control node is used to provide the video server is verified, in the institute by verifying
Block chain is uploaded to after stating the initial overall identification signature of programme content；
The playback terminal executes the video on demand side provided by the invention for playing the programme content
Method.
The present invention has the advantage that
VOD method provided by the invention based on block chain is receiving the programme content from video server
Afterwards, then whether the initial overall identification that the programme content is obtained in block chain judges initial overall identification by Broadcast Control section
Point signature, if there is signature, then it represents that the programme content is not tampered with, and is played out；And end in the program for playing and not signing
Hold, to avoid playing the programme content being tampered, and then avoids causing unnecessary loss to content quotient and operator, and
It is also beneficial to content of supervision quotient and oneself distorts programme content, facilitate subsequent investigation and evidence collection.
Detailed description of the invention
The drawings are intended to provide a further understanding of the invention, and constitutes part of specification, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.
Fig. 1 is a kind of flow chart of the video providing method based on block chain provided in an embodiment of the present invention；
Fig. 2 is a kind of flow chart of the video broadcast control method based on block chain provided in an embodiment of the present invention；
Fig. 3 is a kind of flow chart of the VOD method based on block chain provided in an embodiment of the present invention.
Specific embodiment
Below in conjunction with attached drawing, detailed description of the preferred embodiments.It should be understood that this place is retouched
The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
VOD method provided in this embodiment is to provide programme content by video server based on block chain technology,
And the initial block identification splicing of the initial overall identification and video block to programme content, then signature is uploaded to block chain.Broadcast Control
The programme content that node is used to provide video server is verified, private to the initial overall identification of programme content after verifying
Key signature, and it is uploaded to block chain.Broadcast Control node is also used to provide digital certificate to video server and playback terminal.It plays eventually
It after end obtains programme content, verifies whether initial overall identification signs through Broadcast Control node, and plays the programme content by verifying.
Specifically, as shown in Figure 1, a kind of video providing method based on block chain, is applied to video server, this method
Include:
Step S101 obtains initial overall identification according to the metadata of programme content.
In the present embodiment, programme content is stored in video server, is obtained according to the metadata of programme content initial
Overall identification, i.e., initial overall identification are the unique identifications for identifying programme content.Specifically, the metadata packet of programme content
Include programm name, programme content duration, coded format, code rate, partitioned mode etc., when initial overall identification passes through metadata
Full text information calculate obtain total cryptographic Hash, which is the initial overall identification of programme content.
Programme content is divided into multiple video blocks, and calculates separately the block identification of each video block by step S102.
In step s 102, programme content is divided into multiple video blocks according to the period, such as every 60 seconds are a video
Block divides programme content, and programme content is divided into multiple video blocks in this way, this is conducive to subsequent further to programme content
Verifying, prevents from distorting the partial data in programme content.
In this embodiment, programme content can also be split according to picture group (GOP), i.e., be divided into programme content more
A picture group is further verified programme content according to picture group, is prevented the portion in programme content during subsequent authentication
Divided data is distorted.
After programme content is divided, the cryptographic Hash of each video block is calculated, obtains the initial block identification of each video block.No
Indigestibility, initial block identification are the unique identifications for identifying the video block.
Initial overall identification and block identification are independently spliced acquisition splicing mark by step S103.
In step s 103, initial overall identification and initial block identification are spliced into a character string, form splicing mark,
That is splicing mark is initial overall identification and the spliced character string of initial block identification, then the digital certificate of domestic video server
Signature.Digital certificate is the bill of credit that Broadcast Control node is presented to video server.
When programme content is divided into multiple video blocks, need initial overall identification and each initial block identification difference
Splicing forms splicing mark corresponding with video number of blocks, and then to each splicing mark, opposition is signed respectively.For example, program
Content is divided into 100 pieces of video blocks, then accordingly calculates 100 cryptographic Hash, by this 100 cryptographic Hash and initial overall identification
Independently splice, obtains and form 100 splicing marks, then signed respectively with digital certificate, obtain 100 spellings with signature
Connect mark.
Step S104 signs to splicing mark and is uploaded to block chain.
Splicing mark after signature can be uploaded to block chain by different modes, such as suitable according to the broadcasting of programme content
The corresponding splicing mark of the video block first played is first written block chain, and continuously stored by sequence, to be conducive to subsequent Broadcast Control
Node and playback terminal are searched in block chain.
In some embodiments, when video server uploads multiple programme contents, a such as video server uploads simultaneously
The corresponding splicing mark of two programme contents or two video servers upload the corresponding splicing mark of two programme contents respectively
Know, then block chain can be written one by one according to the sequencing for reaching block chain.
After splicing mark is uploaded to block chain, Broadcast Control node and playback terminal can obtain splicing mark from block chain
Know, so that initial overall identification and initial piecemeal mark are obtained, to do corresponding operating.As playback terminal is obtained from block chain
After initial piecemeal mark, whether the content that can verify video block is tampered.If Broadcast Control node is in the verifying area programme content Hou Cong
Block chain obtains initial overall identification to sign to it, in order to which playback terminal checks initial overall identification whether by Broadcast Control section
Point signature, and basic quotient plays and has the corresponding programme content of the initial overall identification of signature herein, and forbid playing no name initial
The corresponding programme content of overall identification.
As shown in Fig. 2, the present embodiment also provides a kind of video broadcast control method based on block chain, it is applied to Broadcast Control node,
The video broadcast control method includes:
Step S201 receives the metadata of programme content and programme content from video server, and according in program
The metadata of appearance obtains current overall identification.
Current overall identification and initial overall identification are the unique identifications for identifying programme content, if current overall identification
It is consistent with initial overall identification, then it is assumed that the program of video website is not tampered with, otherwise it is assumed that the programme content quilt of video website
It distorts.
Broadcast Control node obtain metadata equally include programm name, programme content duration, coded format, code rate,
Partitioned mode etc., by calculate programme content metadata obtain full text information cryptographic Hash, this cryptographic Hash be exactly when
Preceding overall identification.The splicing mark of programme content is positioned, in block chain by the cryptographic Hash in order to subsequent reading block chain
In cryptographic Hash when no longer need to scan entire block chain, improve the reading efficiency of Broadcast Control node.
Step S202, verifies programme content, and using private key to the initial overall situation of the programme content by verifying
Mark is signed.
Here initial overall identification is that video server is stored in block chain, the metadata of foundation programme content obtains
The unique identification of the mark programme content arrived.Broadcast Control node downloads to programme content (all or part of program from video server
Content) after, the cryptographic Hash of each video block is calculated, that is, obtains current block identification.
It should be noted that Broadcast Control node can use matchmaker when Broadcast Control node is from video server program downloading content
The downloading of body manifold formula, i.e., with online broadcast mode program downloading content, but do not decode.
The splicing mark that video server uploads is obtained from block chain, obtains initial overall identification from splicing mark, with
And the initial block identification of each video block.
Comparing current block identification and initial block identification is had unanimously, to verify whether corresponding video block is tampered；Simultaneously
Pass through the signature of video server in digital certificate authentication each initial block identification.If current block identification and initial block identification one
It causes, and it is correct to sign, then completes the examination to the programme content of video server.
Initial overall identification after signature is uploaded to block chain by step S203.
After Broadcast Control node passes through the examination of programme content, signed using the private key of Broadcast Control node to initial overall identification,
Then block chain is written.After obtaining initial overall identification in order to playback terminal, whether initial overall identification is checked from block chain
It is signed by Broadcast Control node, and forbids playing the corresponding programme content of the initial overall identification of no name, and playing has signature initial complete
Office identifies corresponding programme content.
As shown in figure 3, the present embodiment also provides a kind of VOD method based on block chain, it is applied to playback terminal,
This method comprises:
Step S301 receives the programme content from video server, and obtains the initial overall identification of programme content.
After playback terminal receives the programme content of video server, identified in program by the metadata of programme content
Hold corresponding initial overall identification.Initial overall identification is that video server is stored in block chain, according to programme content
The unique identification for the mark programme content that metadata obtains.
Step S302, judges whether initial overall identification is signed by Broadcast Control node；If initial overall identification is without Broadcast Control node
Signature, then forbid program content playing；If initial overall identification has the signature of Broadcast Control node, program content playing.
The digital certificate issued using Broadcast Control node checks whether initial overall identification passes through Broadcast Control node in block chain
Signature plays the programme content if initial overall identification is signed by Broadcast Control node；If initial overall identification is without Broadcast Control node
Signature, then forbid program content playing.
In some embodiments, during program content playing, the current block of each video block is obtained from programme content
Mark.Video block is the video-frequency band after programme content segmentation；Current block identification is the unique identification for identifying video block content.
Preferably, when obtaining the corresponding initial block identification of video block from block chain for the first time, initial overall identification pair is utilized
The corresponding all initial block identifications of programme content are positioned, in order to no longer scan entire area when subsequent reading original block mark
Block chain, to improve reading efficiency.
The how corresponding initial block identification of video block that video server uploads is obtained from block chain.Initial block identification is video
Server is uploaded to block chain, mark video block content unique identification；
The current block identification and initial block identification of video block are compared, if they are the same, is then played after being decoded to video block；If no
Together, then video block is skipped.
In some embodiments, when playback terminal obtains the video block of programme content, the cryptographic Hash of the video block is calculated,
Current block identification is obtained, is then compared with the initial block identification obtained in block chain, if current block identification and original block mark
Know difference, then shows that the content of the video block is tampered, then skipping the video block, and report an error.If current block identification and just
Beginning block identification is identical, then plays after decoding the video block.
It should be noted that the corresponding all initial block identifications of programme content are downloaded to this from block chain by playback terminal
Then (verifying) is compared in ground one by one, alternatively, it is in real time that initial block identification is locally downloading one by one, while carrying out one by one
It compares.Both modes can verify block identification, so that the network equipment in transmission be avoided to usurp programme content
Change, facilitates the equity for protecting content quotient and operator.
In addition, the present embodiment also provides a kind of video on-demand system based on block chain comprising the connection of block chain network
Video server, Broadcast Control node and playback terminal, wherein
Video server executes video providing method provided in this embodiment for providing programme content.
The programme content that Broadcast Control node is used to provide video server is verified, in the programme content by verifying
Block chain is uploaded to after initial overall identification signature；Broadcast Control node executes video broadcast control method provided in this embodiment.
Playback terminal is used for program content playing, and executes VOD method provided in this embodiment.The playback terminal
Include:
Receiving unit, for receiving the programme content from video server, and from being identified in programme content in the program
The initial overall identification held；Initial overall identification is that video server is stored in block chain, according to first number of programme content
According to the unique identification of obtained mark programme content；
Judging unit, for judging whether initial overall identification passes through the private key signature of Broadcast Control node；Private key signature is to broadcast
Control node is to the signature carried out with its private key to initial overall identification after the programme content verifying of video server；
Authentication module, for obtaining the current block identification of video block according to programme content, and with obtain in block chain with
The corresponding initial block identification of video block is compared；Video block is the video-frequency band after dividing programme content, and initial block identification is
The mark that video server carries out video block.
Decoder module, for being decoded to current block identification and the consistent video block of initial block identification.
Playing module, for the video block after broadcast decoder.
Video on-demand system provided in this embodiment based on block chain is receiving in the program from video server
Whether Rong Hou obtains the initial overall identification of programme content in block chain, then judges initial overall identification by Broadcast Control node
Signature, if there is signature, then it represents that the programme content is not tampered with, and is played out；And end the programme content for playing and not signing,
To avoid playing the programme content being tampered, and then avoid causing unnecessary loss to content quotient and operator, and
Be conducive to content of supervision quotient and oneself distort programme content, facilitates subsequent investigation and evidence collection.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, however the present invention is not limited thereto.For those skilled in the art, essence of the invention is not being departed from
In the case where mind and essence, various changes and modifications can be made therein, these variations and modifications are also considered as protection scope of the present invention.
Claims (10)
1. a kind of VOD method based on block chain is applied to playback terminal, which is characterized in that the described method includes:
The programme content from video server is received, and obtains the initial overall identification of the programme content；It is described initial complete
Office's mark is the mark program that the video server is stored in that in block chain, foundation programme content metadata obtains
The unique identification of content；
Judge whether the initial overall identification is signed by Broadcast Control node；If the label of the initial overall identification without Broadcast Control node
Name, then forbid playing the programme content；If the initial overall identification has the signature of Broadcast Control node, play in the program
Hold.
2. the method according to claim 1, wherein utilizing institute after the programme content for receiving video server
The metadata for stating programme content obtains the initial overall identification of the programme content.
3. the method according to claim 1, wherein described play the programme content, comprising:
The current block identification of each video block is obtained from the programme content, the video block is after the programme content is divided
Video-frequency band；The current block identification is the unique identification for identifying video block content；
The corresponding initial block identification of the video block is obtained from the block chain, the initial block identification is the video server
It is uploaded to the block chain, the mark video block content unique identification；
The current block identification and initial block identification of the video block are compared, if they are the same, is then played after being decoded to the video block；If
Difference then skips the video block.
4. according to the method described in claim 3, it is characterized in that, being corresponded to obtaining the video block from the block chain for the first time
Initial block identification when, determined using the initial overall identification all initial block identifications corresponding to the programme content
Position.
5. according to the method described in claim 3, it is characterized in that, the playback terminal will be in the program from the block chain
It is locally downloading to hold corresponding all initial block identifications；Alternatively, locally downloading one by one in real time.
6. a kind of video providing method based on block chain is applied to video server, which is characterized in that the described method includes:
Initial overall identification is obtained according to the metadata of programme content, the initial overall identification is for identifying in the program
The unique identification of appearance；
The programme content is divided into multiple video blocks, and calculates separately the initial block identification of each video block；
The initial overall identification and the initial block identification are independently spliced to acquisition splicing mark；
It is signed to splicing mark and is uploaded to block chain, in order to which playback terminal obtains the initial overall identification
Afterwards, check whether the initial overall identification is signed by Broadcast Control node from block chain, broadcasting has the signature initial overall identification
The corresponding programme content, and forbid playing the corresponding programme content of initial overall identification described in no name.
7. according to the method described in claim 6, it is characterized in that, the programme content is divided according to period or picture group
At multiple video blocks.
8. according to the method described in claim 6, it is characterized in that, to the splicing identification signature and being uploaded to block described
In chain step, the splicing mark after signature is continuously uploaded to the block by the time sequencing played according to the programme content
Chain.
9. according to the method described in claim 6, it is characterized in that, to the splicing identification signature and being uploaded to block described
In chain step, according to upload request reach the sequencing of the block chain splicing mark after signature is successively uploaded to it is described
Block chain.
10. a kind of video on-demand system based on block chain, which is characterized in that the Video service including the connection of block chain network
Device, Broadcast Control node and playback terminal, wherein
The video server is for providing programme content, and perform claim requires video provider described in 6-9 any one
Method；
The programme content that the Broadcast Control node is used to provide the video server is verified, in the section by verifying
Block chain is uploaded to after the initial overall identification signature of mesh content；
The playback terminal is for playing the programme content, and perform claim requires video on demand described in 1-5 any one
Method.
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| CN112235543A (en) * | 2020-10-14 | 2021-01-15 | 重庆紫光华山智安科技有限公司 | Video encryption method and system based on block chain |
| CN114900305A (en) * | 2022-02-23 | 2022-08-12 | 杭州脸脸会网络技术有限公司 | Block chain-based data processing method and device, electronic device and storage medium |
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