CN108777688A - Video security monitoring method and system - Google Patents
Video security monitoring method and system Download PDFInfo
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- CN108777688A CN108777688A CN201810580956.1A CN201810580956A CN108777688A CN 108777688 A CN108777688 A CN 108777688A CN 201810580956 A CN201810580956 A CN 201810580956A CN 108777688 A CN108777688 A CN 108777688A
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- Prior art keywords
- video
- code stream
- frame data
- key frame
- key
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
- H04L63/045—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload wherein the sending and receiving network entities apply hybrid encryption, i.e. combination of symmetric and asymmetric encryption
Abstract
A kind of Video security monitoring method of present invention offer and system, this method include：Obtain the key frame data of video source code stream；The key frame data of video source code stream is encrypted, the first encryption information is generated；Obtain the key frame data of video end code stream；The key frame data of video end code stream is encrypted, the second encryption information is generated；The first encryption information and the second encryption information are decrypted respectively, and compare the key frame data of the key frame data and video end code stream of the video source code stream after decryption, obtains comparing result；Judge whether content code stream is abnormal according to the comparing result.In the technical solution of Video security monitoring method and system provided by the invention, reduce the data volume of encrypted content, code stream monitoring delay time is shortened, to improve code stream monitoring efficiency and real-time；The accuracy of code stream monitoring can also be improved simultaneously.
Description
Technical field
The present invention relates to fields of communication technology, and in particular, to a kind of Video security monitoring method and system.
Background technology
With the continuous development of Internet technology, the raising of network bandwidth capabilities, explosive growth is presented in video traffic, depending on
Frequency viewing user has reached considerable scale, is asked so the safety problem of transmission of video increasingly becomes in the urgent need to address
Topic, especially IPTV (Internet Protocol Television, live video business) should seek real-time, and require
Safety monitors difficulty bigger.In the transmission process of video, content code stream is easy to be tampered or be replaced, and may lead
Cause illegal contents in terminal plays, there are security risks.
In the related art, mainly there are DRM (Digital Rights Management, digital copyright management), MD5
(Message Digest 5, Message Digest Algorithm 5) safety detection technology and the strong secure transmission technique of two-stage key etc.
Method protects video code flow transmission.But for DRM technology, there is presently no IPTV at home to be used widely, and at
Ben Taigao.
For MD5 safety detection technologies：Since single security key cannot be guaranteed that encrypted safety, security key are passing
All there is the risk being tampered, the dangerous safety for being just likely to influence video code flow of key during defeated or other
Property.
For the strong secure transmission technique of two-stage key：Since this technology needs to carry out two-stage to the video code flow of all transmission
It signs and verifies, need to expend a large amount of computing resource and time, verification process is complicated, and the run time period is too long, especially right
The high live broadcast service of requirement of real-time, cannot be satisfied requirement.
Invention content
The present invention is directed at least solve one of the technical problems existing in the prior art, it is proposed that a kind of Video security monitoring
Method and system, which reduce the data volumes of encrypted content, shorten code stream monitoring delay time, to improve code stream monitoring
Efficiency and real-time；The accuracy of code stream monitoring can also be improved simultaneously.
A kind of Video security monitoring method is provided to achieve the purpose of the present invention, including：
Obtain the key frame data of video source code stream；
The key frame data of the video source code stream is encrypted, the first encryption information is generated；
Obtain the key frame data of video end code stream；
The key frame data of video end code stream is encrypted, the second encryption information is generated；
First encryption information and the second encryption information are decrypted respectively, and compare the video source after decryption
The key frame data of the key frame data and video end code stream of code stream is held, comparing result is obtained；
Judge whether content code stream is abnormal according to the comparing result.
Optionally, the step of key frame data for obtaining video source code stream, including：
From the source, and/or content distributing network Centroid, and/or content distributing network transcoding node of video code flow
In, the first authentic copy of video code flow is obtained, as the video source code stream；
Key frame data is extracted from the video source code stream.
Optionally, the step of key frame data for obtaining video end code stream, including：
From in the routing device of the terminal of video code flow, and/or purpose terminal, the triplicate of video code flow is obtained, is made
For the video source code stream；
Key frame data is extracted from the code stream of the video end.
Optionally, the key frame data to the video source code stream is encrypted, and generates the video source code
The step of encryption information of stream, including：
Generate and distribute the first public key and the first private key；
Signature is encrypted to the key frame data of the video source code stream using pre-defined algorithm and first private key,
Generate the first signing messages.
Optionally, the key frame data to video end code stream is encrypted, and generates the video end code
The step of encryption information of stream, including：
Generate and distribute the second public key and the second private key；
Signature is encrypted to the key frame data of video end code stream using pre-defined algorithm and second private key,
Generate the second signing messages.
Optionally, described that first encryption information and the second encryption information are decrypted respectively, and after comparing decryption
The video source code stream key frame data and video end code stream key frame data, obtain comparing result the step of,
Including：
First signing messages is decrypted using pre-defined algorithm and first public key；
Second signing messages is decrypted using pre-defined algorithm and second public key；
The key frame data of the key frame data and video end code stream of the video source code stream after comparison decryption, is obtained
Obtain comparing result.
Optionally, described that the whether abnormal step of content code stream is judged according to the comparing result, including：
Judge whether content code stream is abnormal according to the comparing result；If so, alert.
As another technical solution, the present invention also provides a kind of Video securities to monitor system comprising：
Acquiring unit, the crucial frame number of key frame data and video end code stream for obtaining video source code stream
According to；
Encryption unit is encrypted for the key frame data to the video source code stream, generates the first encryption information；
And the key frame data of video end code stream is encrypted, generate the second encryption information；
Authentication unit for first encryption information and the second encryption information to be decrypted respectively, and compares decryption
The key frame data of the key frame data and video end code stream of the video source code stream afterwards obtains comparing result；Then
Judge whether content code stream is abnormal according to the comparing result.
Optionally, the acquiring unit includes taking out frame device, is closed for being extracted from the video source code stream received
Key frame data, and extract key frame data from the video end code stream received；Wherein,
The video source code stream is from the source, and/or content distributing network Centroid of video code flow, and/or interior
The first authentic copy of the video code flow obtained in content distributing network transcoding node；
Video end code stream regards for what is obtained from the routing device of the terminal of video code flow, and/or purpose terminal
The triplicate of frequency code stream.
Optionally, the encryption unit includes：
Key Management server, for generating and distributing the first public key and the first private key and the second public key and the second private
Key；
Signature server, for using the crucial frame number of pre-defined algorithm and first private key to the video source code stream
According to signature is encrypted, the first signing messages is generated, and using pre-defined algorithm and second private key to the video end
Signature is encrypted in the key frame data of code stream, generates the second signing messages.
The invention has the advantages that：
In the technical solution of Video security monitoring method and system provided by the invention, by obtaining video source code respectively
The key frame data of stream and video end code stream, and be encrypted, reduce the data volume of encrypted content, shortens code stream monitoring
Delay time, to improve code stream monitoring efficiency and real-time.Meanwhile by video source code stream and video end code stream
Key frame data compared, can improve code stream monitoring accuracy.
Description of the drawings
Fig. 1 is the flow diagram of Video security monitoring method provided in an embodiment of the present invention；
Fig. 2 is a kind of functional block diagram that Video security provided in an embodiment of the present invention monitors system；
Fig. 3 is another functional block diagram that Video security provided in an embodiment of the present invention monitors system.
Specific implementation mode
To make those skilled in the art more fully understand technical scheme of the present invention, come below in conjunction with the accompanying drawings to the present invention
The Video security monitoring method and system of offer are described in detail.
Referring to Fig. 1, Video security monitoring method provided in an embodiment of the present invention comprising：
Step S1 obtains the key frame data of video source code stream；
The key frame data of video source code stream is encrypted in step S2, generates the first encryption information；
Step S3 obtains the key frame data of video end code stream；
The key frame data of video end code stream is encrypted in step S4, generates the second encryption information；
Step S5 is respectively decrypted the first encryption information and the second encryption information, and compares the video source after decryption
The key frame data of the key frame data and video end code stream of code stream is held, comparing result is obtained；
Step S6 judges whether content code stream is abnormal according to comparing result.
Video code flow generally comprises：I frames (frame completely encoded), P frames are (by the I frames generation before referring to only comprising poor
The frame of different code segment) and B frames (by the frame encoded with reference to front and back frame).Wherein, I frames are also known as intracoded frame, be it is a kind of from
Independent frame with all information can be independently decoded without reference to other images, can simply be interpreted as a static picture
Face, therefore, I frames are the key frames of video, if video code flow is tampered, I frames also necessarily change.
Based on this, Video security monitoring method provided in an embodiment of the present invention need to only extract key frame data, and to it
It is monitored, the safety monitoring to video not only may be implemented, but also the data volume of encrypted content can be reduced, shorten code stream prison
Delay time is surveyed, to improve code stream monitoring efficiency and real-time.Meanwhile by video source code stream and video end code
The key frame data of stream is compared, and the accuracy of code stream monitoring can be improved.
It should be noted that in practical applications, above-mentioned steps S1 and step S3 can be carried out at the same time, or can also be adopted
It is successively carried out with random order.
Above-mentioned steps S1, further comprises：
Step S11, from the source, and/or content distributing network Centroid, and/or content distributing network of video code flow
In transcoding node, the first authentic copy of video code flow is obtained, as video source code stream；
Step S12 extracts key frame data from video source code stream.
Optionally, in above-mentioned steps S12, key frame data can be extracted according to the flag of video frame header format.
Above-mentioned steps S3, further comprises：
Step S31 obtains the second of video code flow from the routing device of the terminal of video code flow, and/or purpose terminal
Copy, as video source code stream；
Step S32 extracts key frame data from the code stream of video end.
Optionally, in above-mentioned steps 32, mirror image or spectroscopic modes can be utilized to obtain the triplicate of video code flow.
Above-mentioned steps S2, further comprises：
Step S21 generates and distributes the first public key and the first private key；
Signature is encrypted to the key frame data of video source code stream using pre-defined algorithm and the first private key in step S22,
Generate the first signing messages.
In above-mentioned steps S21, by DES Cipher or 3DES, under after video source code stream symmetric cryptography,
It generates and distributes the first public key and the first private key.
In above-mentioned steps S22, pre-defined algorithm can be Digital Signature Algorithm comprising but be not limited to：RSA,
ElGamal, Fiat-Shamir, Schnorr, Des/DSA and elliptic curve digital signature algorithm etc..
Above-mentioned steps S4, further comprises：
Above-mentioned steps S41 further generates and distributes the second public key and the second private key；
Above-mentioned steps S42, further use pre-defined algorithm and the second private key to the key frame data of video end code stream into
Row ciphering signature generates the second signing messages.
In above-mentioned steps S41, by DES Cipher or 3DES, under after video source code stream symmetric cryptography,
It generates and distributes the first public key and the first private key.
In above-mentioned steps S42, pre-defined algorithm can be Digital Signature Algorithm comprising but be not limited to：RSA,
ElGamal, Fiat-Shamir, Schnorr, Des/DSA and elliptic curve digital signature algorithm etc..
Above-mentioned steps S5, further comprises：
Step S51 is decrypted using pre-defined algorithm and first the first signing messages of public key pair；
Step S52 is decrypted using pre-defined algorithm and second the second signing messages of public key pair；
Step S53, the crucial frame number of the key frame data and video end code stream of the video source code stream after comparison decryption
According to acquisition comparing result.
Optionally, above-mentioned comparing result is the crucial frame number of the key frame data and video end code stream of video source code stream
According to whether consistent.
Above-mentioned steps S6, including：
Judge whether content code stream is abnormal according to above-mentioned comparing result；If so, alert.
The abnormal conditions of content code stream include：Content code stream is tampered or is replaced, so as to lead to illegal contents
In terminal plays, there are security risks.
Optionally, if comparison result is inconsistent, code stream can be generated and be tampered warning message, and with the side such as short message, mail
Formula informs maintenance personnel.
As another technical solution, also referring to Fig. 2 and Fig. 3, the embodiment of the present invention also provides a kind of Video security
Monitoring system comprising acquiring unit 1, encryption unit 2 and authentication unit 3.Wherein, acquiring unit 1 is for obtaining video source
The key frame data of code stream and the key frame data of video end code stream.
Optionally, which can be to take out frame device 11, crucial for being extracted from the video source code stream received
Frame data, and extract key frame data from the video end code stream received；Wherein, video source code stream is from video codes
The video code flow obtained in the source, and/or content distributing network Centroid, and/or content distributing network transcoding node of stream
The first authentic copy；Video end code stream is the video obtained from the routing device of the terminal of video code flow, and/or purpose terminal
The triplicate of code stream.
Encryption unit 2 generates the first encryption information for the key frame data of video source code stream to be encrypted；With
And the key frame data of video end code stream is encrypted, generate the second encryption information.
Optionally, encryption unit 2 includes：
Key Management server 21, for generating and distributing the first public key and the first private key and the second public key and second
Private key；
Signature server 22, for being carried out to the key frame data of video source code stream using pre-defined algorithm and the first private key
Ciphering signature generates the first signing messages, and uses the crucial frame number of pre-defined algorithm and the second private key to video end code stream
According to signature is encrypted, the second signing messages is generated.
Authentication unit 3 is for being respectively decrypted the first encryption information and the second encryption information, and after comparing decryption
The key frame data of the key frame data and video end code stream of video source code stream obtains comparing result, then according to comparison
As a result judge whether content code stream is abnormal.
Authentication unit 3 is, for example, authentication server 31.
Optionally, Video security monitoring system further includes alarm unit 4, for according to the instruction sent from authentication unit
It generates code stream and is tampered warning message, and maintenance personnel is informed in a manner of short message, mail etc..
In conclusion in the technical solution of Video security monitoring method provided by the invention and system, by obtaining respectively
The key frame data of video source code stream and video end code stream, and be encrypted, reduce the data volume of encrypted content, shortens
Code stream monitors delay time, to improving code stream monitoring efficiency and real-time.Meanwhile by video source code stream and regarding
The key frame data of frequency end code stream is compared, and the accuracy of code stream monitoring can be improved.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, however the present invention is not limited thereto.For those skilled in the art, in the essence for not departing from the present invention
In the case of refreshing and essence, various changes and modifications can be made therein, these variations and modifications are also considered as protection scope of the present invention.
Claims (10)
1. a kind of Video security monitoring method, which is characterized in that including：
Obtain the key frame data of video source code stream；
The key frame data of the video source code stream is encrypted, the first encryption information is generated；
Obtain the key frame data of video end code stream；
The key frame data of video end code stream is encrypted, the second encryption information is generated；
First encryption information and the second encryption information are decrypted respectively, and compare the video source code after decryption
The key frame data of the key frame data and video end code stream of stream obtains comparing result；
Judge whether content code stream is abnormal according to the comparing result.
2. Video security monitoring method according to claim 1, which is characterized in that the pass for obtaining video source code stream
The step of key frame data, including：
From the source, and/or content distributing network Centroid of video code flow, and/or content distributing network transcoding node, obtain
The first authentic copy for taking video code flow, as the video source code stream；
Key frame data is extracted from the video source code stream.
3. Video security monitoring method according to claim 1, which is characterized in that the pass for obtaining video end code stream
The step of key frame data, including：
From in the routing device of the terminal of video code flow, and/or purpose terminal, the triplicate of video code flow is obtained, as institute
State video source code stream；
Key frame data is extracted from the code stream of the video end.
4. Video security monitoring method according to claim 1, which is characterized in that described to the video source code stream
Key frame data is encrypted, the step of generating the encryption information of the video source code stream, including：
Generate and distribute the first public key and the first private key；
Signature is encrypted to the key frame data of the video source code stream using pre-defined algorithm and first private key, is generated
First signing messages.
5. Video security monitoring method according to claim 4, which is characterized in that described to video end code stream
Key frame data is encrypted, the step of generating the encryption information of video end code stream, including：
Generate and distribute the second public key and the second private key；
Signature is encrypted to the key frame data of video end code stream using pre-defined algorithm and second private key, is generated
Second signing messages.
6. Video security monitoring method according to claim 5, which is characterized in that described to believe respectively first encryption
Breath and the second encryption information are decrypted, and compare key frame data and the video end of the video source code stream after decryption
The step of key frame data of code stream, acquisition comparing result, including：
First signing messages is decrypted using pre-defined algorithm and first public key；
Second signing messages is decrypted using pre-defined algorithm and second public key；
The key frame data of the key frame data and video end code stream of the video source code stream after comparison decryption, acquisition pair
Compare result.
7. Video security monitoring method according to claim 1, which is characterized in that described to be judged according to the comparing result
The whether abnormal step of content code stream, including：
Judge whether content code stream is abnormal according to the comparing result；If so, alert.
8. a kind of Video security monitors system, which is characterized in that including：
Acquiring unit, the key frame data of key frame data and video end code stream for obtaining video source code stream；
Encryption unit is encrypted for the key frame data to the video source code stream, generates the first encryption information；With
And the key frame data of video end code stream is encrypted, generate the second encryption information；
Authentication unit, for first encryption information and the second encryption information to be decrypted respectively, and compare decryption after
The key frame data of the key frame data and video end code stream of the video source code stream obtains comparing result；Then basis
The comparing result judges whether content code stream is abnormal.
9. Video security according to claim 8 monitors system, which is characterized in that the acquiring unit includes taking out frame device,
For extracting key frame data from the video source code stream received, and from the video end code stream received
Middle extraction key frame data；Wherein,
The video source code stream is from the source, and/or content distributing network Centroid, and/or content of video code flow point
The first authentic copy of the video code flow obtained in hairnet network transcoding node；
Video end code stream is the video codes obtained from the routing device of the terminal of video code flow, and/or purpose terminal
The triplicate of stream.
10. Video security according to claim 8 monitors system, which is characterized in that the encryption unit includes：
Key Management server, for generating and distributing the first public key and the first private key and the second public key and the second private key；
Signature server, for using pre-defined algorithm and first private key to the key frame data of the video source code stream into
Row ciphering signature generates the first signing messages, and using pre-defined algorithm and second private key to video end code stream
Key frame data be encrypted signature, generate the second signing messages.
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| CN201810580956.1A CN108777688A (en) | 2018-06-07 | 2018-06-07 | Video security monitoring method and system |
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Application publication date: 20181109 |