CN108235060B - Video encryption playing method, system and storage medium based on parameter set confusion - Google Patents
Video encryption playing method, system and storage medium based on parameter set confusion Download PDFInfo
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- CN108235060B CN108235060B CN201810198671.1A CN201810198671A CN108235060B CN 108235060 B CN108235060 B CN 108235060B CN 201810198671 A CN201810198671 A CN 201810198671A CN 108235060 B CN108235060 B CN 108235060B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
- H04N21/2347—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving video stream encryption
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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
- H04N21/258—Client or end-user data management, e.g. managing client capabilities, user preferences or demographics, processing of multiple end-users preferences to derive collaborative data
- H04N21/25808—Management of client data
- H04N21/25816—Management of client data involving client authentication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
- H04N21/26613—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel for generating or managing keys in general
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—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
- H04N21/4405—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 video stream decryption
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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
- H04N21/4408—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 video stream encryption, e.g. re-encrypting a decrypted video stream for redistribution in a home network
Abstract
The invention relates to a video encryption playing method and system based on parameter set confusion and a computer readable storage medium, belonging to the technical field of internet. By adopting the video encryption playing method and system based on parameter set confusion and the computer readable storage medium, the signaling password is used for only carrying out confusion encryption on the original parameter set of the original video to obtain the encrypted parameter set and the encrypted video, so that the video encryption and decryption can be realized under the condition of only using lower operation amount, the playing legality is effectively verified, the video source safety is improved, the burden of a mobile terminal processor and a network is reduced, the video playing fluency and the user experience are effectively ensured, and the video encryption playing method and system based on parameter set confusion and the computer readable storage medium have the advantages of simple and convenient application mode, low implementation cost and quite wide application range.
Description
Technical Field
The invention relates to the technical field of internet, in particular to the technical field of internet video service security, and specifically relates to a video encryption playing method and system based on parameter set confusion and a computer readable storage medium.
Background
At present, for the purposes of improving user experience, reducing jamming, saving flow and the like, a video source caching technology is generally adopted for various major network video player products, or online videos are cached locally to be played offline. According to the scheme, the playing experience is optimized, meanwhile, the hidden danger of video source data leakage exists, and particularly, in an Android player, a user can easily acquire data cached in the player through a technical means. It is therefore desirable to provide a data encryption method that effectively increases the security of video source data. The common video data encryption method in the prior art is usually very complex and has huge computation, so that the burden of a mobile end processor and a network is increased, and the video playing fluency is reduced, the user experience is poorer, and the like, which have huge adverse effects. Therefore, how to provide a video encryption playing method which has low or moderate computation amount and can effectively check the playing legality so as to improve the security of a video source and ensure the user experience becomes a problem to be solved urgently in the field.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a video encryption playing method, a system and a computer readable storage medium based on parameter set confusion, which can realize video encryption and decryption only by using a low operation amount, thereby effectively verifying the playing legality, improving the video source security and ensuring the user experience.
In order to achieve the above object, the video encryption playing method based on parameter set confusion of the present invention comprises the following steps:
(1) the video server or the client performs confusion encryption on an original parameter set of an original video by using a signaling password to obtain an encryption parameter set and an encrypted video;
(2) the client stores the encrypted video;
(3) the client acquires the signaling password;
(4) the client decrypts the encrypted video by using the signaling password to obtain the original video;
(5) and the client plays the original video.
In the method for encrypting and playing the video based on the parameter set confusion, the step (1) specifically comprises the following steps:
the video server side in the step (1A-1) utilizes a signaling password to perform confusion encryption on an original parameter set to obtain an encryption parameter set;
(1A-2) the video server replaces the original parameter set with the encrypted data set to generate an encrypted video;
(1A-3) the client acquires the encrypted video from the video server according to the user operation.
And the step (3) specifically comprises the following steps:
(3A-1) the client sends identity information to the video server;
(3A-2) the video server judges whether the client is legal or not according to the identity information, if so, the step (3A-3) is carried out;
(3A-3) the video server sends the signaling password to the client.
In the method for encrypting and playing the video based on the parameter set confusion, the step (1) specifically comprises the following steps:
(1B-1) the client acquires the signaling password and the original video from the video server according to user operation;
(1B-2) the client performs obfuscation encryption on the original parameter set by using the signaling password to obtain an encryption parameter set;
(1B-3) the client generating an encrypted video by replacing the original parameter set with the encrypted data set. And the step (3) specifically comprises the following steps:
(3B-1) the client sends identity information to the video server;
(3B-2) the video server judges whether the client is legal or not according to the identity information, if so, the step (3B-3) is carried out;
(3B-3) the video server sends the signaling password to the client.
In the video encryption playing method based on parameter set confusion, the identity information is user identity information or client equipment identification information, and the video server judges whether the client is legal according to the identity information specifically comprises the following steps:
and the video server judges whether the user is a legal user or not according to the user identity information or judges whether the client is a legal client or not according to the client equipment identification information.
In the method for encrypting and playing video based on parameter set confusion, the step (3) may further specifically include the following steps:
(3b-1) the client verifies whether the user identity information is legal, if so, the step (3b-2) is carried out;
(3b-2) the client provides the signaling password for the legal user.
In the video encryption playing method based on parameter set confusion, the signaling password is a fixed point matrix of N × N, wherein N is the data length of the original parameter set.
In the method for encrypting and playing the video based on parameter set confusion, the confusion encryption is performed on the original parameter set by using the signaling password to obtain the encrypted parameter set and the encrypted video, and the method specifically comprises the following steps: multiplying the matrix and the original parameter set to obtain an encryption parameter set, and replacing the original parameter set in the original video with the encryption parameter set to obtain an encrypted video;
the decrypting the encrypted video by using the signaling password to obtain the original video specifically comprises the following steps: multiplying the inverse matrix of the matrix by the encryption parameter set to obtain the original parameter set; and replacing the encryption parameter set in the encrypted video by the original parameter set to obtain the original video.
The present invention also provides a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the above-mentioned video encryption playing method based on parameter set obfuscation.
The invention also provides a video encryption playing system based on parameter set confusion for realizing the method.
By adopting the video encryption playing method and system based on parameter set confusion and the computer readable storage medium, the signaling password is used for only carrying out confusion encryption on the original parameter set of the original video to obtain the encrypted parameter set and the encrypted video, so that the video encryption and decryption can be realized under the condition of only using lower operation amount, the playing legality is effectively verified, the video source safety is improved, the burden of a mobile terminal processor and a network is reduced, the video playing fluency and the user experience are effectively ensured, and the video encryption playing method and system based on parameter set confusion and the computer readable storage medium have the advantages of simple and convenient application mode, low implementation cost and quite wide application range.
Drawings
Fig. 1 is a flowchart illustrating steps of a video encryption playing method based on parameter set obfuscation according to the present invention.
Detailed Description
In order to clearly understand the technical contents of the present invention, the following examples are given in detail.
Fig. 1 is a flowchart illustrating steps of a video encryption playing method based on parameter set obfuscation according to the present invention.
In one embodiment, the video encryption playing method based on parameter set confusion comprises the following steps:
(1) the video server or the client performs confusion encryption on an original parameter set of an original video by using a signaling password to obtain an encryption parameter set and an encrypted video;
(2) the client stores the encrypted video;
(3) the client side obtains the signaling password;
(4) the client decrypts the encrypted video by using the signaling password to obtain the original video;
(5) and the client plays the original video.
If the video server side encrypts the original video, the step (1) specifically comprises the following steps:
the video server side in the step (1A-1) utilizes a signaling password to perform confusion encryption on an original parameter set to obtain an encryption parameter set;
(1A-2) the video server replaces the original parameter set with the encrypted data set to generate an encrypted video;
(1A-3) the client acquires the encrypted video from the video server according to the user operation.
Correspondingly, the step (3) specifically comprises the following steps:
(3A-1) the client sends identity information to the video server;
(3A-2) the video server judges whether the client is legal or not according to the identity information, if so, the step (3A-3) is carried out;
(3A-3) the video server sends the signaling password to the client.
If the client side encrypts the original video, the step (1) specifically comprises the following steps:
(1B-1) the client acquires the signaling password and the original video from the video server according to user operation;
(1B-2) the client performs obfuscation encryption on the original parameter set by using the signaling password to obtain an encryption parameter set;
(1B-3) the client generating an encrypted video by replacing the original parameter set with the encrypted data set.
Correspondingly, the step (3) specifically includes the following steps:
(3B-1) the client sends identity information to the video server;
(3B-2) the video server judges whether the client is legal or not according to the identity information, if so, the step (3B-3) is carried out;
(3B-3) the video server sends the signaling password to the client.
In the embodiment of encrypting the original video by the client, the step (3) may further alternatively include the steps of:
(3b-1) the client verifies whether the user identity information is legal, if so, the step (3b-2) is carried out;
(3b-2) the client provides the signaling password for the legal user.
The video encryption playing system based on parameter set confusion for realizing the method of the embodiment comprises a video server and a client which are connected through a network.
The video server side is used for carrying out confusion encryption on an original parameter set of an original video by using a signaling password to obtain an encryption parameter set and an encrypted video; the client is used for sending the video server to obtain the original video or the encrypted video, carrying out confusion encryption on an original parameter set of the original video by using a signaling password to obtain an encrypted parameter set and the encrypted video, and storing the encrypted video; requesting and acquiring the signaling password from the video server; decrypting the encrypted video by using the signaling password to obtain the original video; and playing the original video.
If the video server side encrypts the video, the video server side is used for carrying out confusion encryption on the original parameter set by using a signaling password to obtain an encryption parameter set; replacing the original parameter set with the encrypted data set to generate an encrypted video; the client is used for obtaining the encrypted video from the video server according to user operation.
If the client side encrypts the video, the client side is used for acquiring the signaling password and the original video from the video server side according to user operation; carrying out confusion encryption on the original parameter set by using the signaling password to obtain an encryption parameter set; and replacing the original parameter set with the encrypted data set to generate an encrypted video.
The identity information is user identity information or client equipment identification information, and the video server judges whether the client is legal according to the identity information specifically as follows: and the video server judges whether the user is a legal user or not according to the user identity information or judges whether the client is a legal client or not according to the client equipment identification information.
In the video encryption playing system based on parameter set confusion for implementing the method of the preferred embodiment, the client is further configured to send identity information to the video server; the video server is used for judging whether the client is legal or not according to the identity information, and if so, the signaling password is sent to the client. The identity information is user identity information or client equipment identification information, and the video server judges whether the user is a legal user or not according to the user identity information or judges whether the client is a legal client or not according to the client equipment identification information. In part of application modes, such as the client in the flight mode, the client can also verify whether the user identity information is legal or not, and then the client provides the signaling password for the legal user, so that the signaling password does not need to be acquired through the server.
In a more preferred embodiment, the signaling cipher is a fixed-point number matrix of N × N, where N is the data length of the original parameter set.
The method for carrying out confusion encryption on the original parameter set by using the signaling password to obtain the encrypted parameter set and the encrypted video specifically comprises the following steps: multiplying the matrix and the original parameter set to obtain an encryption parameter set, and replacing the original parameter set in the original video with the encryption parameter set to obtain an encrypted video;
the decrypting the encrypted video by using the signaling password to obtain the original video specifically comprises the following steps: multiplying the inverse matrix of the matrix by the encryption parameter set to obtain the original parameter set; and replacing the encryption parameter set in the encrypted video by the original parameter set to obtain the original video.
The present invention also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the method and the system for video encryption playing based on parameter set obfuscation according to the above embodiments are implemented.
In practical applications, the main structure of the video stream of the currently mainstream video compression coding standards, such as h.264 and h.265, includes a part of key data called parameter Sets (Paramater Sets), such as h.264 including two parameter Sets, SPS and PPS, and h.265 including three parameter Sets, VPS/SPS/PPS. These parameter sets are usually used as the main part of the video head, and have a critical meaning in the steps of player initialization, etc., if the parameter sets are absent or the data in the parameter sets are wrong, the player instance cannot be successfully established, and further, the player cannot be played. In addition, the parameter set includes key information such as video resolution and initialized quantization parameters, and decoding of the video stream cannot be performed even if the data or data errors are lacking.
Before playing or caching data, data of a video parameter set is subjected to data confusion by a certain string of signaling passwords (Token), so that the video parameter set data can be effectively encrypted, wherein the encrypted Token is a fixed point matrix with the length of N × N, and N is the length of the encrypted data in the video parameter set.
For a video parameter set requiring encryption, all data can be selected if the data amount is not large, and part of data can be selected if the data amount is large. The first N bytes of data may be selected; of course, more complex designs are possible, such as selecting intermediate, backend, or non-contiguous N bytes of data based on the decision conditions given by the backend/service.
For a legal playing user, a complete encrypted Token will be obtained. For the requirement of appointed client playing (preventing illegal playing), the requirement can be automatically obtained when the client playing is initialized; for the appointed user playing, the logic similar to the video website pay-on-demand can be adopted, and after the user playing authority is judged, whether to request the Token data before playing is selected. Token data can be transmitted by https, and is not stored outside the client program (e.g., in a cache), so that the risk of leakage does not exist at the client.
Before playing, multiplying the parameter set data with the specified length by the inverse matrix of Token to restore the original video parameter set, and the original video parameter set can be played normally; for the illegal playing user, since the correct Token cannot be obtained, the error of the parameter set data will result in that the player cannot be built or the playing is abnormal.
The invention can be embodied in both static and dynamic ways.
The static mode means that the background side encrypts the original video, and the Token is used to convert all the online video and then send the converted online video. And the player decodes and plays the video data and Token after receiving the video data and Token.
The dynamic mode refers to that the data in the background is encrypted and then cached before being played by the client, namely the data in the background is original, namely the data stored in the online video is the original video data. After the player requests video data, if local caching is needed, before the video data is written into the cache, a Token matrix is used for encrypting a video head and storing the video head into the cache; if no buffering is needed, the data can be directly played without encryption. When the encrypted video is played, the signaling password can be obtained from the background server side in a static mode, and the signaling password can also be provided after the client side verifies that the user is legal.
By the method, the copyright side can effectively control the playing authorization of the video content, only allows legally authorized users to play the video content, and unauthorized users cannot play the video content even by means of exporting a video source and the like, so that illegal playing behaviors are effectively prevented, and the rights and interests of the copyright side are protected.
By adopting the video encryption playing method and system based on parameter set confusion and the computer readable storage medium, the signaling password is used for only carrying out confusion encryption on the original parameter set of the original video to obtain the encrypted parameter set and the encrypted video, so that the video encryption and decryption can be realized under the condition of only using lower operation amount, the playing legality is effectively verified, the video source safety is improved, the burden of a mobile terminal processor and a network is reduced, the video playing fluency and the user experience are effectively ensured, and the video encryption playing method and system based on parameter set confusion and the computer readable storage medium have the advantages of simple and convenient application mode, low implementation cost and quite wide application range.
In this specification, the invention has been described with reference to specific embodiments thereof. It will, however, be evident that various modifications and changes may be made thereto without departing from the broader spirit and scope of the invention. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.
Claims (10)
1. A video encryption playing method based on parameter set confusion is characterized by comprising the following steps:
(1) the video server or the client uses the signaling password to perform obfuscation encryption on the original parameter set of the original video to obtain an encryption parameter set and an encrypted video,
the signaling password is a fixed point matrix of N × N, wherein N is the data length of the original parameter set,
the video server or the client performs obfuscation encryption on an original parameter set of an original video by using a signaling password to obtain an encryption parameter set and an encrypted video specifically include: multiplying the matrix and the original parameter set to obtain an encryption parameter set, and replacing the original parameter set in the original video with the encryption parameter set to obtain an encrypted video;
(2) the client stores the encrypted video;
(3) the client acquires the signaling password;
(4) the client decrypts the encrypted video by using the signaling password to obtain the original video,
the step of decrypting the encrypted video by the client by using the signaling password to obtain the original video by the client specifically comprises the following steps: multiplying the inverse matrix of the matrix by the encryption parameter set to obtain the original parameter set; replacing the encryption parameter set in the encrypted video by the original parameter set to obtain an original video;
(5) and the client plays the original video.
2. The method for encrypting and playing back a video based on parameter set obfuscation as claimed in claim 1, wherein the step (1) specifically includes the steps of:
the video server side in the step (1A-1) utilizes a signaling password to perform confusion encryption on an original parameter set to obtain an encryption parameter set;
(1A-2) the video server generating an encrypted video by replacing the original parameter set with the encryption parameter set;
(1A-3) the client acquires the encrypted video from the video server according to the user operation.
3. The method for encrypting and playing back a video based on parameter set obfuscation as claimed in claim 2, wherein the step (3) includes the following steps:
(3A-1) the client sends identity information to the video server;
(3A-2) the video server judges whether the client is legal or not according to the identity information, if so, the step (3A-3) is carried out;
(3A-3) the video server sends the signaling password to the client.
4. The parameter set confusion-based video encryption playing method according to claim 3, wherein the identity information is user identity information or client device identification information, and the video server determines whether the client is legal according to the identity information specifically as follows:
and the video server judges whether the user is a legal user or not according to the user identity information or judges whether the client is a legal client or not according to the client equipment identification information.
5. The method for encrypting and playing back a video based on parameter set obfuscation as claimed in claim 1, wherein the step (1) specifically includes the steps of:
(1B-1) the client acquires the signaling password and the original video from the video server according to user operation;
(1B-2) the client performs obfuscation encryption on the original parameter set by using the signaling password to obtain an encryption parameter set;
(1B-3) the client generating an encrypted video by replacing the original parameter set with the encryption parameter set.
6. The method for encrypting and playing back a video based on parameter set obfuscation as claimed in claim 5, wherein the step (3) includes the following steps:
(3B-1) the client sends identity information to the video server;
(3B-2) the video server judges whether the client is legal or not according to the identity information, if so, the step (3B-3) is carried out;
(3B-3) the video server sends the signaling password to the client.
7. The method for video encryption and playing based on parameter set confusion as claimed in claim 6, wherein the identity information is user identity information or client device identification information, and the video server determines whether the client is legal according to the identity information specifically as follows:
and the video server judges whether the user is a legal user or not according to the user identity information or judges whether the client is a legal client or not according to the client equipment identification information.
8. The method for encrypting and playing back a video based on parameter set obfuscation as claimed in claim 5, wherein the step (3) includes the following steps:
(3b-1) the client verifies whether the user identity information is legal, if so, the step (3b-2) is carried out;
(3b-2) the client provides the signaling password for the legal user.
9. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the method for video encrypted playback based on parameter set obfuscation according to any one of claims 1 to 8.
10. A video encryption playing system based on parameter set confusion, which is characterized in that the system comprises a video server and a client connected through a network and is used for implementing the video encryption playing method based on parameter set confusion in any one of the above claims 1 to 8.
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| CN114286130A (en) * | 2021-12-29 | 2022-04-05 | 北京深思数盾科技股份有限公司 | Video encryption method, video processing method and device and electronic equipment |
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| CN104980816A (en) * | 2014-04-01 | 2015-10-14 | 泰学(北京)文化传媒有限公司 | Digital video content copyright protection method and system based on SD card |
| CN104639943A (en) * | 2015-01-30 | 2015-05-20 | 中国科学院信息工程研究所 | H.264 coding standard-based general video encryption method and system |
| CN105704545A (en) * | 2016-01-20 | 2016-06-22 | 中国科学院信息工程研究所 | Secret key synchronizing information transmission method based on H.264 video stream |
| CN106303584A (en) * | 2016-08-10 | 2017-01-04 | 北京蛙视通信技术股份有限公司 | The audio, video data of transmission is carried out encipher-decipher method |
| CN106570815A (en) * | 2016-10-21 | 2017-04-19 | 广东工业大学 | Image encryption method based on double-chaos system and blocking |
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