CN113141542A - Video stream safe playing system, method, medium and server based on block chain - Google Patents
Video stream safe playing system, method, medium and server based on block chain Download PDFInfo
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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
- H04N21/845—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
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/64—Protecting data integrity, e.g. using checksums, certificates or signatures
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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
- H04N21/254—Management at additional data server, e.g. shopping server, rights management server
- H04N21/2541—Rights Management
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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
- H04N21/45—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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The invention provides a video stream safe playing system, a method, a medium and a server based on a block chain, wherein the video stream safe playing system based on the block chain comprises: the system comprises a video stream output module, a video stream segmentation module, a video content blockchain transaction module, a blockchain module, a network transmission module and a blockchain transaction verification module; and the block chain transaction verification module is used for judging whether the transaction corresponding to the video segment content exists in all the transaction information. The invention provides a video stream tampering detection and safe broadcasting design system and method based on a block chain.
Description
Technical Field
The invention belongs to the field of block chains and network video streaming media, relates to a safe playing method of a video stream, and particularly relates to a safe playing system, method, medium and server of the video stream based on the block chains.
Background
With the proliferation of internet media, mainstream media such as radio and television also transmit various video streams over the internet. The open internet is not as safe and controllable as a closed Network such as a cable television Network, and the like, so that a company and an individual who grasp Network equipment can easily control transmitted contents, such as tampering or replacing video streams, and such security holes are also proved by frequently appearing DNS (Domain Name System), CDN (Content Delivery Network) hijacking, Content Delivery Network (CDN) servers being blacked out, web contents being added with advertisements, and the like. This presents new challenges for the secure playout of mainstream media.
At present, DRM (Digital Rights Management) has been adopted to secure content in the open internet, but DRM (Digital Rights Management) from the beginning of this century is intended to protect the interests of the copyright holders of Digital files, and users must obtain authorization to play media while ensuring that media files are freely copied. It encrypts the media file and stores the media ID, and requests the media copyright management server according to the media ID to verify if the user has the authorization. The application scenarios are mainly personal computers and customized hardware with DRM (Digital Rights Management) decoding chips, which are limited by the heavy calculation process during decoding and playing.
However, at present, a large number of smart devices are limited to their own computing power, and cannot perform DRM (Digital Rights Management) decryption and video decoding simultaneously on a general-purpose platform. Meanwhile, DRM (Digital Rights Management) is a centralized system, a media Rights Management server is easily attacked, and internal information itself is easily tampered, which cannot really satisfy the broadcast control security of the mainstream media transmitting video stream on the open internet.
Therefore, how to provide a system, a method, a medium and a server for safely playing a video stream based on a blockchain is a technical problem to be urgently solved by those skilled in the art to solve the problem that the prior art cannot ensure that a video player actively stops playing after a video stream is tampered or replaced to achieve safe playing under the condition of opening the internet with a low computation requirement.
Disclosure of Invention
In view of the above drawbacks of the prior art, an object of the present invention is to provide a system, a method, a medium, and a server for playing a video stream safely based on a blockchain, so as to solve the problem that the prior art cannot realize safe playing of a video stream under a low computation requirement of the open internet.
In order to achieve the above and other related objects, an aspect of the present invention provides a video stream secure playing system based on a blockchain, which is applied to a server, and the video stream secure playing system based on the blockchain includes: the system comprises a video stream output module, a video stream segmentation module, a video content blockchain transaction module, a blockchain module, a network transmission module and a blockchain transaction verification module; the video stream output module is used for transmitting a video stream to the video stream segmentation module and transmitting the video stream to the network transmission module for network transmission; the video stream segmentation module is used for segmenting the video stream provided by the video stream output module and transmitting each generated segment of video segment content and the position information corresponding to the segment of video segment content in the video stream to the video content block chain transaction module; the video content block chain transaction module is used for initiating a block chain transaction for the current video segmented content and the position information of the current video segmented content corresponding to the current video segmented content in the video stream through a block chain account; the block chain module is used for generating a block aiming at the initiated block chain transaction according to a block chain block-out rule and synchronizing the information of the block to all block chain nodes; the network transmission module is used for receiving the video stream of the video stream output module and transmitting the video stream to a playing terminal through network transmission; the block chain transaction verification module is used for inquiring transaction information on the block chain module after receiving a transaction verification request initiated by a playing terminal aiming at the same video segment content and the position information corresponding to the video segment content in the video stream, and judging whether a transaction corresponding to the video segment content and the position information corresponding to the video segment content in the video stream exists in all the transaction information or not; if so, sending the information of successful transaction verification to the playing terminal, and if not, sending the information of failed transaction verification to the playing terminal so that the playing terminal can safely play the video segmented content when the transaction verification is successful.
The invention provides a video stream safe playing method based on a block chain, which is applied to a server side, and comprises the following steps: segmenting the transmitted video stream to generate video segmentation content; initiating a block chain transaction for the current video segmented content and the corresponding position information in the video stream through a block chain account; generating a block aiming at the initiated block chain transaction according to a block chain block-out rule, and synchronizing the information of the block to all block chain nodes; after receiving a transaction verification request initiated by a playing terminal aiming at the same video segment content and corresponding position information in a video stream received by the player, inquiring transaction information; judging whether the video segmented content exists in all the transaction information and the transaction corresponding to the corresponding position information in the video stream received by the player; if so, sending the information of successful transaction verification to the playing terminal, and if not, sending the information of failed transaction verification to the playing terminal so that the playing terminal can safely play the video segmented content when the transaction verification is successful.
In an embodiment of the present invention, the step of segmenting the transmitted video stream to generate the content of the video segment includes: segmenting a transmitted video stream according to a preset rule; the preset rules are segmentation rules determined according to different streaming media protocols.
In an embodiment of the present invention, the step of initiating a blockchain transaction for the current video segment content through a blockchain account number includes: and calculating the information abstract calculation value of the current video segmentation content, and initiating a transaction by the block chain account number according to the information abstract calculation value and the position information corresponding to the information abstract calculation value in the video stream.
In an embodiment of the present invention, when a live stream is segmented according to a network video protocol of the live stream and a generated clip file is used as the video segmentation content, an information summary calculation value of each clip file is calculated, and the information summary calculation value and its corresponding position information in the video stream initiate a transaction with the blockchain account.
In an embodiment of the present invention, the step of generating a block for the initiated blockchain transaction according to a blockchain out rule and synchronizing information of the block to all blockchain nodes includes: selecting a block outlet node of the block chain transaction according to a consensus mechanism, generating a block based on the information summary calculation value and the file address of the slice file through the block outlet node, and synchronizing to all block chain nodes.
In an embodiment of the present invention, the determining whether the transaction information includes the video segment content and the transaction corresponding to the position information in the video stream; if so, sending the information of successful transaction verification to the playing terminal, and if not, sending the information of failed transaction verification to the playing terminal, wherein the steps of: judging whether the information abstract calculation value of the video segmentation content in the transaction verification request and the position information corresponding to the information abstract calculation value in the video stream exist in one transaction of the transaction information; if yes, sending information of successful transaction verification to the playing terminal to inform the playing terminal that the video stream is normal, and decoding and playing the video stream; if not, sending the information of the transaction verification failure to the playing terminal to inform the playing terminal of the tampering of the video stream and refuse to play the video stream.
Yet another aspect of the present invention provides a medium, on which a computer program is stored, which when executed by a processor implements the method for secure playing of a video stream based on a blockchain.
In another aspect, the present invention provides a server, including: a processor and a memory; the memory is used for storing computer programs, and the processor is used for executing the computer programs stored in the memory, so that the server executes the safe playing method of the video stream based on the blockchain.
The last aspect of the invention provides a safe playing system, which comprises a playing terminal and the server.
As described above, the system, method, medium and server for safely playing video streams based on block chains according to the present invention have the following advantages:
after the video stream is segmented, the information of the segmented video is stored by using block chain transaction, a transaction block is inquired during playing, and whether the video stream is tampered or replaced is judged according to whether the segmented video transaction exists, so that the technical means for determining whether playing is carried out ensures that the playing is stopped when the video stream on the open Internet is replaced or tampered. Because the traditional methods such as Digital Rights Management (DRM) carry out encryption transmission on all files, the calculation amount is large, and the DRM needs to carry out decryption based on a private key at a terminal, the calculation amount is large, and an excessive load is caused on an intelligent terminal with weak calculation capability; meanwhile, the decoding needs DRM centralized service and is easy to be attacked and paralyzed, so compared with the traditional methods such as DRM (Digital Rights Management), the system and the method for detecting and safely broadcasting the video stream falsification based on the block chain, provided by the invention, can not generate forged transaction information because the block data can not be falsified, can not be paralyzed because the distributed service of the block chain is difficult to be paralyzed, and can work smoothly because the background undertakes high-complexity calculation and the weak terminal can work.
Drawings
Fig. 1 is a schematic block connection diagram of a video stream secure playing system based on a block chain according to an embodiment of the present invention.
Fig. 2 is a schematic flow chart illustrating a video stream secure playing method based on a blockchain according to an embodiment of the present invention.
Fig. 3 is a flowchart illustrating a secure playing method of a video stream based on a blockchain according to an embodiment of the present invention.
Fig. 4 is a system connection diagram of the secure playback system according to an embodiment of the invention.
Description of the element reference numerals
1 video stream safety playing system based on block chain
11 video stream output module
12 video stream segmentation module
13 video content blockchain transaction module
14 network transmission module
15 Block chain transaction verification module
16 block chain module
4 safe playing system
41 Player terminal
42 service end
S21-S27
S30-S39
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
The technical principles of the system, the method, the medium and the server for safely playing the video stream based on the block chain are as follows: based on the block chain technology, the server side segments the video stream, and places the segmented video content and the position information corresponding to the segmented video content in the video stream as transaction content on a block chain by a certain user; and after receiving the video stream content, the video player segments the video stream according to the same segmentation mode, and then inquires whether the user has the current segmented video content and the blockchain transaction of the position information corresponding to the current segmented video content in the video stream from the server so as to determine whether the video stream is tampered, thereby determining whether the video stream should be played.
Example one
The embodiment provides a video stream secure playing system based on a blockchain, which is applied to a server, and the video stream secure playing system based on the blockchain includes: the system comprises a video stream output module, a video stream segmentation module, a video content blockchain transaction module, a blockchain module, a network transmission module and a blockchain transaction verification module;
the video stream output module is used for transmitting a video stream to the video stream segmentation module and transmitting the video stream to the network transmission module for network transmission;
the video stream segmentation module is used for segmenting the video stream provided by the video stream output module and transmitting each generated segment of video segmentation content to the video content block chain transaction module;
the video content block chain transaction module is used for initiating a block chain transaction for the current video segmented content and the position information of the current video segmented content corresponding to the current video segmented content in the video stream through a block chain account;
the block chain module is used for generating a block aiming at the initiated block chain transaction according to a block chain block-out rule and synchronizing the information of the block to all block chain nodes;
the network transmission module is used for receiving the video stream of the video stream output module and transmitting the video stream to a playing terminal through network transmission;
the block chain transaction verification module is used for inquiring transaction information on the block chain module after receiving a transaction verification request initiated by a playing terminal aiming at the same video segment content and the position information corresponding to the video segment content in the video stream, and judging whether a transaction corresponding to the video segment content and the position information corresponding to the video segment content in the video stream exists in all the transaction information or not; if so, sending the information of successful transaction verification to the playing terminal, and if not, sending the information of failed transaction verification to the playing terminal so that the playing terminal can safely play the video segmented content when the transaction verification is successful.
The video stream secure playing system based on the blockchain provided by the embodiment will be described in detail with reference to the drawings. It should be noted that the division of the modules of the following system is only a logical division, and the actual implementation may be wholly or partially integrated into one physical entity or may be physically separated. And the modules can be realized in a form that all software is called by the processing element, or in a form that all the modules are realized in a form that all the modules are called by the processing element, or in a form that part of the modules are called by the hardware. For example: a module may be a separate processing element, or may be integrated into a chip of the system described below. Further, a certain module may be stored in the memory of the following system in the form of program code, and a certain processing element of the following system may call and execute the function of the following certain module. Other modules are implemented similarly. All or part of the modules can be integrated together or can be independently realized. The processing element described herein may be an integrated circuit having signal processing capabilities. In implementation, the steps of the above method or the following modules may be implemented by hardware integrated logic circuits in a processor element or instructions in software.
The following modules may be one or more integrated circuits configured to implement the above methods, for example: one or more Application Specific Integrated Circuits (ASICs), one or more Digital Signal Processors (DSPs), one or more Field Programmable Gate Arrays (FPGAs), and the like. When some of the following modules are implemented in the form of a program code called by a Processing element, the Processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of calling the program code. These modules may be integrated together and implemented in the form of a System-on-a-chip (SOC).
Please refer to fig. 1, which is a block chain-based video stream security playing system according to an embodiment of the present invention. The embodiment provides a video stream tamper detection and safe play-out system based on a block chain. The technical problem of how to stop playing when the video stream on the open Internet is replaced or tampered is solved. As shown in fig. 1, the video stream secure playing system based on the blockchain is applied to a server, and includes: the system comprises a video stream output module 11, a video stream segmentation module 12, a video content blockchain transaction module 13, a network transmission module 14, a blockchain transaction verification module 15 and a blockchain module 16.
The video stream output module 11 is configured to transmit a video stream to the video stream segmentation module 12, and simultaneously transmit a video stream to the network transmission module 14 for network transmission.
The video stream segmentation module 12 is configured to segment the video stream provided by the video stream output module 11, and transmit each generated segment of video segment content to the video content blockchain transaction module 13.
In this embodiment, the video stream segmentation module 12 is specifically configured to segment a transmitted video stream according to a preset rule; the preset rules are segmentation rules determined according to different streaming media protocols. The Streaming media Protocol includes HLS (HTTP Live Streaming), TS over UDP (Transport Stream over User datagram Protocol), multicast, or RTSP (Real Time Streaming Protocol).
The video content blockchain transaction module 13 is configured to initiate a blockchain transaction on the current video segment content through a blockchain account.
In this embodiment, the video content blockchain transaction module 13 is specifically configured to calculate an information summary calculation value of the current video segment content, and initiate a transaction by using the information summary calculation value and the position information corresponding to the information summary calculation value in the video stream through the blockchain account.
In practical application, the video content blockchain transaction module 13 is specifically configured to calculate an information summary calculation value of each slice file when a live stream is segmented according to a network video protocol of the live stream and a generated slice file is used as the video segmentation content, and initiate a transaction with the blockchain account number on the basis of the information summary calculation value and position information corresponding to the information summary calculation value in the video stream; and the file address of the slice file is sourced from the index file corresponding to the generated slice file.
The network transmission module 14 is configured to receive the video stream of the video stream output module, and transmit the video stream to a play terminal through network transmission.
The blockchain transaction verification module 15 is configured to query the transaction information on the blockchain module 16 after receiving a transaction verification request initiated by the playing terminal for the same video segment content and the position information corresponding to the same video segment content in the video stream, and determine whether a transaction corresponding to the video segment content exists in all the transaction information; if so, sending the information of successful transaction verification to the playing terminal, and if not, sending the information of failed transaction verification to the playing terminal so that the playing terminal can safely play the video segmented content when the transaction verification is successful.
It should be noted that the playing terminal includes a video player module, and after receiving the video stream of the network transmission module, the video player module performs segmentation by using the same segmentation method as the video stream segmentation module. The video player module sends a request to the blockchain transaction verification module for the video content of the current segment and the position information corresponding to the video content in the video stream, and confirms whether the video content and the position information are the transaction of the user appointed by the video content blockchain transaction module.
In this embodiment, the blockchain transaction verification module 15 is specifically configured to determine whether an information summary calculation value of the video segment content in the transaction verification request and position information corresponding to the information summary calculation value in the video stream are simultaneously present in one transaction of the transaction information; if yes, sending information of successful transaction verification to the playing terminal to inform the playing terminal that the video stream is normal, and decoding and playing the video stream; if not, sending the information of the transaction verification failure to the playing terminal to inform the playing terminal of the tampering of the video stream and refuse to play the video stream.
The blockchain module 16 is configured to generate a block for the initiated blockchain transaction according to a blockchain out-of-block rule, and synchronize information of the block to all blockchain nodes.
In this embodiment, the blockchain module 16 is specifically configured to select a block output node of the blockchain transaction according to a consensus mechanism, generate a block based on the information digest calculation value and the file address of the slice file through the block output node, and synchronize to all blockchain nodes.
It should be noted that the video Stream output module adopts a network video Protocol of HTTP Live Streaming (HTTP Live Streaming, HTTP Real-Time Streaming media Protocol), the scene is Live Streaming, and meanwhile, the present invention is also applicable to on-demand Streaming scenes, the video Stream output module is not limited to HLS (HTTP Live Streaming, HTTP Real-Time Streaming media Protocol), and may also be other Streaming media protocols, such as TS over UDP (Transport Stream over User datagram Protocol, Transport Stream based on User datagram Protocol) multicast, or RTSP (Real Time Streaming Protocol), etc.; the Network transmission module is a common HTTP CDN (HyperText Transfer Protocol Content Delivery Network, a Content Delivery Network based on a HyperText Transfer Protocol), or other CDN (Content Delivery Network) modes compatible with the format of the video stream output module; in order to reduce the network transmission and the block chain storage and calculation pressure, the video content block chain transaction module calculates the MD5 value (Message-Digest Algorithm 5, information Digest calculation value of MD5 Algorithm) of the video segment or other data Digest calculation methods, such as SHA series Algorithm (Secure Hash Algorithm), MD series other algorithms, and the like, and then stores the 128-bit MD5 value as the block chain transaction content, and the block chain account number initiating the transaction as the account number allocated to the video stream output module in advance in the video content block chain transaction module and the video player module.
The video stream secure playing system based on the blockchain according to the embodiment solves the problem that the video player should actively stop playing to ensure secure playing immediately after the video stream is tampered or replaced with a low calculation amount. As the block data cannot be tampered, forged transaction information does not appear, the distributed service of the block chain is not prone to paralysis, and meanwhile, the weak terminal can work smoothly as the background bears high-complexity calculation.
Example two
The embodiment provides a video stream secure playing method based on a block chain, which is applied to a server, and the video stream secure playing method based on the block chain comprises the following steps:
segmenting the transmitted video stream to generate video segmentation content;
initiating a block chain transaction for the current video segmented content and the corresponding position information in the video stream through a block chain account;
generating a block aiming at the initiated block chain transaction according to a block chain block-out rule, and synchronizing the information of the block to all block chain nodes;
after receiving a transaction verification request initiated by a playing terminal aiming at the same video segment content and the position information corresponding to the same video segment content in the video stream, inquiring transaction information;
judging whether the video segmented content and the transaction corresponding to the video segmented content in the position information in the video stream exist in all the transaction information; if so, sending the information of successful transaction verification to the playing terminal, and if not, sending the information of failed transaction verification to the playing terminal so that the playing terminal can safely play the video segmented content when the transaction verification is successful.
The method for safely playing video streams based on blockchains according to the present embodiment will be described in detail below with reference to the drawings. Please refer to fig. 2, which is a schematic flow chart illustrating a video stream security playing method based on a block chain according to an embodiment of the present invention. As shown in fig. 2, the method for safely playing a video stream based on a block chain specifically includes the following steps:
and S21, segmenting the transmitted video stream to generate video segment content.
In this embodiment, the video stream is a live stream or an on-demand stream. Segmenting a transmitted video stream according to a preset rule; the preset rules are segmentation rules determined according to different streaming media protocols. The Streaming media Protocol includes HLS (HTTP Live Streaming), TS over UDP (Transport Stream over User datagram Protocol), multicast, or RTSP (Real Time Streaming Protocol).
In practical applications, the video stream transmission mode is an HTTP CDN (HyperText Transfer Protocol Content Delivery Network, a Content Delivery Network based on a HyperText Transfer Protocol), or another CDN (Content Delivery Network) mode compatible with a video stream output module format.
S22, initiating a blockchain transaction with the current video segment content through a blockchain account.
In this embodiment, a calculated value of an information summary of the current video segment content is calculated, and the calculated value of the information summary and the position information corresponding to the calculated value in the video stream initiate a transaction through the blockchain account.
In an actual application of this embodiment, when a live stream is segmented according to a network video protocol of the live stream and a generated clip file is used as the video segmentation content, an information summary calculation value of each clip file is calculated, and the information summary calculation value and its corresponding position information in the video stream initiate a transaction with the blockchain account.
It should be noted that, in order to reduce the network transmission and the storage and calculation pressure of the block chain, the calculated value of the information Digest is an MD5 value (Message-Digest Algorithm 5, the calculated value of the information Digest of the MD5 Algorithm) or other data Digest calculation manners, such as a SHA series Algorithm (Secure Hash Algorithm), other algorithms of the MD series, and the like, and then the 128-bit MD5 value is used as the content of the block chain transaction, and the account number of the block chain initiating the transaction is an account number allocated to the video stream output module in advance and is stored in the video content block chain transaction module and the video player module, and the account number of the block chain is burned in the video player in advance to ensure that the account number is the same as the account number when the block chain transaction module of the video content initiates the transaction with the background content production.
S23, generating blocks aiming at the initiated block chain transaction according to a block chain out rule, and synchronizing the information of the blocks to all block chain nodes.
In this embodiment, a block output node of the blockchain transaction is selected according to a consensus mechanism, a block based on the information summary calculation value and the file address of the slice file is generated by the block output node, and the block is synchronized to all blockchain nodes.
In practical application, the block chaining-out rule is a rule for selecting a certain node to perform block out based on a consensus mechanism. The nodes decide who qualifies for the block, and the consensus mechanism decides which of the qualified nodes can eventually qualify for the block. All the nodes have the right of voting, when a block is to be extracted each time, all the nodes participate in the voting, and the voting is carried out according to a consensus mechanism, so that one node is selected, all the nodes achieve consensus through the consensus mechanism, the voting in the current round is subject to the block extracted by the selected node, and the blocks extracted by other nodes are not considered any more.
S24, after receiving the transaction verification request initiated by the playing terminal aiming at the same video segment content and the position information thereof in the video stream, inquiring the transaction information.
And S25, judging whether the transaction information contains the transaction corresponding to the video segment content, so that the playing terminal can play the video segment content safely when the transaction is verified successfully. If yes, go to step S26; if not, go to step S27.
In this embodiment, it is determined whether the video segment content information summary calculation value and the position information corresponding to the video segment content information summary calculation value in the transaction verification request exist in one transaction of the transaction information at the same time.
And S26, sending the information of successful transaction verification to the playing terminal.
In this embodiment, the information of successful transaction verification is sent to the playing terminal to notify the playing terminal that the video stream is normal, and the video stream is decoded and played.
And S27, sending the information of the transaction verification failure to the playing terminal.
In this embodiment, the information of the transaction verification failure is sent to the playing terminal to notify the playing terminal that the video stream is tampered, and the playing of the video stream is rejected.
The present embodiment provides a computer storage medium having a computer program stored thereon, which when executed by a processor implements the block chain-based video stream secure playback method.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the above method embodiments may be performed by hardware associated with a computer program. The aforementioned computer program may be stored in a computer readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned computer-readable storage media comprise: various computer storage media that can store program codes, such as ROM, RAM, magnetic or optical disks.
In practical application, the video stream secure playing method based on the block chain provided by this embodiment uses an HLS network video protocol and takes a live stream as a specific implementation case.
Specifically, please refer to fig. 3, which is a flowchart illustrating a secure playing process of a video stream based on a block chain according to an embodiment of the present invention. Wherein, the related abbreviations mean: HLS (HTTP Live Streaming), HTTP CDN (HyperText Transfer Protocol Content Delivery Network, Content Delivery Network based on HyperText Transfer Protocol), TS (Transport Stream), MD5 value (Message-Digest Algorithm 5, information computation value Digest of MD5 Algorithm), and CDN (Content Delivery Network). As shown in fig. 3, the method for safely playing live streaming based on block chain includes the steps of:
and S30, outputting the HLS live stream.
Specifically, the video stream output module outputs HLS live stream to the HTTP CDN for network transmission, and step S34 is executed; at the same time, a copy of HLS live stream is also downloaded by the video stream segmentation module, and step S31 is performed.
S31, the TS file of the slice in the HLS is output as each video segment.
Specifically, the TS file sliced in the HLS is directly output as each video segment by the video stream segmentation module. HLS is dynamic rate adaptation technology of Apple, and comprises an index file of M3u8 and a TS media slice file.
S32, calculating the MD5 value of each TS file content, and using the MD5 value and the position serial number of the TS in the video stream to initiate transaction with the designated block chain account number.
Specifically, the MD5 value of each TS file content is calculated by the video content blockchain transaction module, and a transaction is initiated with the designated blockchain account number using this MD5 value and the TS' position number in this video stream. And the position SEQUENCE number of the TS in the video stream is obtained by adding the EXT-X-MEDIA-SEQUENCE value in the M3u8 file and the sorting of the TS in M3u 8. By storing the content summary MD5 value and the position number of the TS in the video stream in the block chain, the same content can be prevented from being repeatedly added into the video stream, or some fragments can be deleted, or the original content can be prevented from being disordered in sequence.
S33, selecting the node of the block, generating the transaction block based on the MD5 value and the position sequence number of TS in the video stream, and synchronizing to all the block chain nodes.
Specifically, the blockchain module selects the next block node according to its consensus mechanism, generates a transaction block based on the MD5 value and the position number of the TS in the video stream, and synchronizes to all blockchain nodes. In order to increase the processing speed, a MAP under the specified block chain account number is maintained by an intelligent contract on the node, the Key of the MAP is the position sequence number of the TS in the video stream, and the Value is the corresponding MD5 Value. In the art, the intelligent contract is a computer protocol intended to propagate, verify, or execute contracts in an informational manner.
It should be noted that, for the live streaming scenario, in order to ensure that the transaction blocks are synchronized when the blockchain transaction verification module verifies that the transaction is completed in step S37, the sum of the block out interval of the blockchain and the block synchronization time is shorter than the sum of the time required by the HTTP CDN to transmit the same TS slice and the local cache time of the video player.
And S34, transmitting the HLS live broadcast stream to the video player through network transmission.
Specifically, the HTTP CDN is used as a network transmission module, receives the HLS live stream of the video stream output module, and performs network transmission.
S35, the sliced TS file is divided into each video segment by the video player.
Specifically, the video player receives an HLS live stream transmitted by the CDN, and directly uses a sliced TS file as each video segment.
S36, calculating the MD5 value of the current TS file content by the video player, and using the same designated blockchain account number, MD5 value and the position serial number of the TS in the video stream to request the blockchain transaction verification module to verify whether the transaction exists.
Specifically, the video player calculates the MD5 value for the current TS file content and requests the blockchain transaction verification module to verify that there is a transaction with the same designated blockchain account number, this MD5 value, and the TS' location number in the video stream as in step 32.
And S37, calling the intelligent contract to determine whether the transaction exists.
Specifically, the query function provided by the smart contract is called by the blockchain transaction verification module, and whether a key exists in the blockchain account number as the location number of the TS in the video stream and whether the key is the same as the MD5 value in the player request is queried from the MAP generated in step S33, and if the two determinations are true, it is determined that the transaction exists, otherwise, the transaction does not exist. The transaction execution step S38 exists, and the transaction execution step S39 does not exist.
In an actual application of this embodiment, the blockchain account is set as the account a, the account a generates multiple transactions, and all transactions correspond to a set of location serial numbers of the TS in the video stream and MD5 values, so as to form a one-to-many mapping relationship, and when transaction verification is performed, if the location serial numbers of the TS to be verified in the video stream and the MD5 values belong to one set of the account a through a query function, it indicates that the transaction verification is successful.
And S38, the video player normally decodes and plays.
S39, the video player refuses playing, and the video player is prompted that the video stream is tampered.
The video stream safe playing method based on the block chain solves the problem that a video player needs to actively stop playing immediately to ensure safe playing after the video stream is tampered or replaced under a low calculation amount. As the block data cannot be tampered, forged transaction information does not appear, the distributed service of the block chain is not prone to paralysis, and meanwhile, the weak terminal can work smoothly as the background bears high-complexity calculation.
EXAMPLE III
This embodiment provides a server, the server includes: a processor, memory, transceiver, communication interface, or/and system bus; the memory and the communication interface are connected with the processor and the transceiver through a system bus and complete mutual communication, the memory is used for storing a computer program, the communication interface is used for communicating with other equipment, and the processor and the transceiver are used for operating the computer program so as to enable the server to execute each step of the video stream safe playing method based on the block chain.
The above-mentioned system bus may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The system bus may be divided into an address bus, a data bus, a control bus, and the like. The communication interface is used for realizing communication between the database access device and other equipment (such as a client, a read-write library and a read-only library). The Memory may include a Random Access Memory (RAM), and may further include a non-volatile Memory (non-volatile Memory), such as at least one disk Memory.
The Processor may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the device can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, or discrete hardware components.
The server side in this embodiment solves the problem that the video player should actively stop playing immediately after the video stream is tampered or replaced to ensure safe playing under a low calculation amount. As the block data cannot be tampered, forged transaction information does not appear, the distributed service of the block chain is not prone to paralysis, and meanwhile, the weak terminal can work smoothly as the background bears high-complexity calculation.
Example four
The embodiment provides a secure playing system, which comprises a playing terminal and a server.
Please refer to fig. 4, which is a schematic system connection diagram of a secure playback system according to an embodiment of the present invention. As shown in fig. 4, the secure broadcast system 4 includes a broadcast terminal 41 and a server 42.
In this embodiment, the playing terminal 41 includes a video player module, and is configured to receive a video stream transmitted by a network, and perform segmentation by using the same segmentation method as that of the server 42. And initiates a transaction verification request to the server 42 for the video content of the current segment and the position sequence number of the segment in the video stream.
In this embodiment, the server 42 is configured to segment the transmitted video stream to generate video segment content; initiating a block chain transaction by the current video segment content and the position serial number of the segment in the video stream through a block chain account; generating a block aiming at the initiated block chain transaction according to a block chain block-out rule, and synchronizing the information of the block to all block chain nodes; after receiving a transaction verification request initiated by a playing terminal aiming at the same video segment content and the position serial number of the segment in the video stream, inquiring transaction information; judging whether the transaction corresponding to the video segment content exists in all the transaction information; if so, sending the information of successful transaction verification to the playing terminal, and if not, sending the information of failed transaction verification to the playing terminal so that the playing terminal can safely play the video segmented content when the transaction verification is successful.
The protection scope of the video stream secure playing method based on the block chain is not limited to the execution sequence of the steps listed in this embodiment, and all the schemes of adding, subtracting, and replacing the steps in the prior art according to the principle of the present invention are included in the protection scope of the present invention.
The invention also provides a video stream safe playing system based on the block chain, which can realize the video stream safe playing method based on the block chain, but the device for realizing the video stream safe playing method based on the block chain of the invention includes but is not limited to the structure of the video stream safe playing system based on the block chain, and all structural modifications and replacements in the prior art made according to the principle of the invention are included in the protection scope of the invention.
In summary, compared with the conventional drm (digital Rights management) and other methods, the system, the method, the medium and the server for safely playing the video stream based on the blockchain according to the present invention do not generate forged transaction information because the block data cannot be tampered, and the distributed service of the blockchain is not likely to be broken down, and meanwhile, the weak terminal can also work smoothly because the background undertakes high-complexity computation, so that the safe playing of the video stream can be realized under the condition of opening the internet with a lower computation requirement. The invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. The video stream safe playing system based on the block chain is applied to a server side, and comprises: the system comprises a video stream output module, a video stream segmentation module, a video content blockchain transaction module, a blockchain module, a network transmission module and a blockchain transaction verification module;
the video stream output module is used for transmitting a video stream to the video stream segmentation module and transmitting the video stream to the network transmission module for network transmission;
the video stream segmentation module is used for segmenting the video stream provided by the video stream output module and transmitting each generated segment of video segment content and the position information corresponding to the segment of video segment content in the video stream to the video content block chain transaction module;
the video content block chain transaction module is used for initiating a block chain transaction for the current video segmented content and the position information of the current video segmented content corresponding to the current video segmented content in the video stream through a block chain account;
the block chain module is used for generating a block aiming at the initiated block chain transaction according to a block chain block-out rule and synchronizing the information of the block to all block chain nodes;
the network transmission module is used for receiving the video stream of the video stream output module and transmitting the video stream to a playing terminal through network transmission;
the block chain transaction verification module is used for inquiring transaction information on the block chain module after receiving a transaction verification request initiated by a playing terminal aiming at the same video segment content, and judging whether a transaction corresponding to the video segment content and position information of the video segment content in a video stream exists in all the transaction information; if so, sending the information of successful transaction verification to the playing terminal, and if not, sending the information of failed transaction verification to the playing terminal so that the playing terminal can safely play the video segmented content when the transaction verification is successful.
2. A video stream safe playing method based on a block chain is characterized in that the method is applied to a server side and comprises the following steps:
segmenting the transmitted video stream to generate video segmentation content;
initiating a block chain transaction for the current video segmented content and the corresponding position information in the video stream through a block chain account;
generating a block aiming at the initiated block chain transaction according to a block chain block-out rule, and synchronizing the information of the block to all block chain nodes;
after receiving a transaction verification request initiated by a playing terminal aiming at the same video segment content and the position information corresponding to the same video segment content in the video stream, inquiring transaction information;
judging whether the video segmented content and the transaction corresponding to the video segmented content in the position information in the video stream exist in all the transaction information; if so, sending the information of successful transaction verification to the playing terminal, and if not, sending the information of failed transaction verification to the playing terminal so that the playing terminal can safely play the video segmented content when the transaction verification is successful.
3. The method for safely playing video stream based on blockchain according to claim 2, wherein the step of segmenting the transmitted video stream to generate video segment content comprises:
segmenting a transmitted video stream according to a preset rule; the preset rules are segmentation rules determined according to different streaming media protocols.
4. The method as claimed in claim 2, wherein the step of initiating a blockchain transaction with the current video segment content and its corresponding location information in the video stream via a blockchain account number comprises:
and calculating the information abstract calculation value of the current video segment content, and initiating a transaction by the block chain account according to the information abstract calculation value and the position information of the segment corresponding to the video stream.
5. The method for safely playing video stream based on block chain according to claim 4,
when the transmitted live stream is segmented according to a network video protocol of the live stream, and the generated slice files are used as the video segmentation content, calculating an information abstract calculation value of each slice file, and initiating a transaction by using the information abstract calculation value and position information corresponding to the information abstract calculation value in the video stream through the blockchain account number.
6. The blockchain-based secure playback method of video streams according to claim 5, wherein the step of generating a block for the initiated blockchain transaction according to a blockchain out block rule and synchronizing the information of the block to all blockchain nodes comprises:
selecting a block outlet node of the block chain transaction according to a consensus mechanism, generating a block based on the information summary calculation value and the file address of the slice file through the block outlet node, and synchronizing to all block chain nodes.
7. The method according to claim 4, wherein the determining step determines whether there is a transaction corresponding to the video segment content in all the transaction information; if so, sending the information of successful transaction verification to the playing terminal, and if not, sending the information of failed transaction verification to the playing terminal, wherein the steps of:
judging whether the information abstract calculation value of the video segmentation content in the transaction verification request and the position information of the segment corresponding to the video stream exist in one transaction of the transaction information at the same time;
if yes, sending information of successful transaction verification to the playing terminal to inform the playing terminal that the video stream is normal, and decoding and playing the video stream;
if not, sending the information of the transaction verification failure to the playing terminal to inform the playing terminal of the tampering of the video stream and refuse to play the video stream.
8. A medium having stored thereon a computer program, characterized in that the program, when being executed by a processor, implements the blockchain based video stream secure playback method of any one of claims 2 to 7.
9. A server, comprising: a processor and a memory;
the memory is used for storing a computer program, and the processor is used for executing the computer program stored by the memory to enable the server to execute the safe playing method of the video stream based on the block chain according to any one of claims 2 to 7.
10. A secure broadcasting system, comprising a broadcasting terminal and the server of claim 9.
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