CN201435788Y - Digital video coder having real-time encryption function - Google Patents
Digital video coder having real-time encryption function Download PDFInfo
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- CN201435788Y CN201435788Y CN2009201074859U CN200920107485U CN201435788Y CN 201435788 Y CN201435788 Y CN 201435788Y CN 2009201074859 U CN2009201074859 U CN 2009201074859U CN 200920107485 U CN200920107485 U CN 200920107485U CN 201435788 Y CN201435788 Y CN 201435788Y
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- 238000012544 monitoring process Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 238000012545 processing Methods 0.000 description 5
- 238000013500 data storage Methods 0.000 description 3
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Abstract
The utility model discloses a digital video coder having the real-time encryption function, which includes a safety chip storing the SM1 algorithm and calculates according to the SM1 algorithm, an analog video input interface module, a digital video coding module, an encryption calculating module and a network interface module, wherein the analog video input interface module receives digital videosignals and transfers into digital video data streams, and transmits to the digital video coding module; the digital video coding module receives the digital video data streams and transfers into compression-coded digital video data streams; and when encrypting the digital video date streams, the encryption calculating module calls the safety chip for encryption calculation, so as to transfer thecompression-coded digital video data streams into encryption video data streams. The utility model has the advantages of improving the difficulty and the cost of filching the video data contents, efficiently reducing the risk of video image information leakage or steal during the network transmission, and enhancing the safety of video image information.
Description
Technical field
The utility model relates to a kind of encoder, particularly relates to a kind of video encoder with the real-time encrypted function of video codeword data stream, belongs to technical field of video monitoring.
Background technology
At present, as shown in fig. 1, common digital video monitor system generally is made of front monitoring front-end and Surveillance center, wherein, front monitoring front-end partly is made of video signal collective device (video camera, camera etc.), digital video code 1, transmission equipment, memory etc., and Surveillance center partly is made of memory, transmission equipment, control terminal, digital video decoder, display etc.
In described digital video monitor system, described video signal collective device is responsible for converting monitored object to vision signal; Described digital video code is in order to convert vision signal to the video data stream that can transmit by circuit or network; Described (web-transporting device with or network constitute a data transmission channel that is communicated with front monitoring front-end and Surveillance center; Described memory is in order to be responsible for the vision signal that storage of collected arrives; The video data stream that described digital video decoder is responsible for receiving converts the vision signal that can be accepted by regular display to; And described display is responsible for showing the vision signal of recovering out through decoder; Described control terminal then is in order to said process is controlled.
By this described digital video monitor system, the monitor staff can monitor one or more monitored object in Surveillance center in real time, and the content of being monitored can be stored by memory, as the resource or the authority of later retrieval or verification.
Video monitoring system although it is so because of its simple structure, with low costly obtained extensive application, and cracking that some are heavy, bringing into play important effect in the megacase process.But be to use such system; it is carrying out but existing tangible potential safety hazard when vedio data transmits; reason is that through the video data that digital video code 1 was encoded be the data (promptly expressly) of not taking any encipherment protection; as long as anyone is ready, but just all the very low cost of only use expense can intercept and capture and watch picture material easily.Therefore, monitored object is important, special when institute, or vedio data need be by public network (especially passing through wireless channel) when transmitting, and the loss that this potential safety hazard may cause will be very huge.
In addition, because the existing above-mentioned defective of this described ordinary video supervisory control system makes the range of application of video monitoring be subjected to very big restriction.In order to guarantee that sensitive information is not stolen, some system cheap, ubiquitous public network of abandonment cost (as internet, public's wireless network etc.) of having to, and the very high VPN network of self-built video private network or lease cost, construction and use cost that this has increased system undoubtedly greatly have a strong impact on giving full play to of video monitoring system effect.
The utility model content
In view of the defective that exists in the prior art, main purpose of the present utility model is to provide that a kind of can to carry out the SM1 algorithm to video code flow real-time encrypted, can reduce sensitive information and leak or risk that is stolen and the digital video code with real-time encrypted function that can enlarge the video monitoring system scope of application.
To achieve these goals, the digital video code with real-time encrypted function described in the utility model has adopted following technical proposals:
Digital video code with real-time encrypted function described in the utility model is to have increased a computations module in the prior art the ordinary numbers video encoder, this computations module is connected with the special-purpose safety chip of an embedded SM1 algorithm, can be before video data stream be sent to Network Interface Module, it is carried out real-time SM1 algorithm for encryption calculate, make the ordinary numbers video encoder have real-time encrypted function digital video bit stream.This digital video code with SM1 algorithm for encryption function mainly comprises analog video input interface module, digital video coding module, computations module, safety chip and Network Interface Module; Wherein, described analog video input interface module, digital video coding module, computations module and Network Interface Module link to each other in regular turn, and described safety chip is connected with described computations module, can directly call this safety chip when the computations module is carried out computations to video data stream; Described analog video input interface module receives the analog video signal from video camera or the transmission of other video equipment, convert this analog video signal to digital video data stream, and should pass to described digital video coding module by described digital video data stream; Described digital video coding module converts thereof into the compressed encoding digital video data stream after receiving this digital video data stream; Described computations module is carried out real-time encrypted calculating to the compressed encoding digital video data stream from described digital video coding module, so that this compressed encoding digital video data stream finally is enciphered video data stream when Network Interface Module is exported; The employed SM1 algorithm of described computations module is preserved by described safety chip, and SM1 algorithm calculating process is also finished by described safety chip.
Compared to existing technology, by the digital video code with real-time encrypted function described in the utility model, when watching enciphered video data stream picture content if desired, then must use identical key and identical algorithm to be decrypted to encrypting bitstream, so greatly improved difficulty and the cost of stealing video data content, effectively prevented the risk that the sensitive video frequency image information is leaked or is stolen when transmitting by network, the fail safe that has improved video image information.
Description of drawings
Fig. 1 is the system block diagram of ordinary numbers video monitoring system in the prior art;
Fig. 2 is the functional block diagram of ordinary numbers video encoder described in the prior art;
Fig. 3 is the functional block diagram with digital video code of real-time encrypted function described in the utility model;
Fig. 4 is the specific embodiment with digital video code of real-time encrypted function described in the utility model.
Embodiment
Come the digital video code with real-time encrypted function described in the utility model is described in further detail below in conjunction with accompanying drawing and specific embodiment.
See Fig. 2, ordinary numbers video encoder 1 of the prior art mainly comprises analog video input interface module 10, digital video coding module 11, Network Interface Module 12, its course of work is: from the analog video signal (composite video signal, RGB component etc.) of video camera 2 or other video equipment, at first carry out processing such as frame decoding, A/D conversion, be converted to digital video data stream (the uncompressed coding) by analog video input interface module 10; Secondly, this unpressed digital video data stream through digital video coding module 11 and by according to certain video compression algorithm (as H.264, MPEG-4 etc.), convert the compressed encoding digital video data stream to; Last compressed encoding digital video data stream is packaged into transmission or Internet video data flow according to certain procotol (as IP etc.), is sent to Surveillance center by Network Interface Module 12 through transmission line or network (referring to the direction of A shown in the figure).
Shown in Fig. 2 and Fig. 3, digital video code 3 with real-time encrypted function described in the utility model is with respect to ordinary numbers video encoder 1 of the prior art, it has increased the special-purpose safety chip 14 of embedded SM1 algorithm, and then on the basis of ordinary numbers video encoder 1, increased encryption function to digital video bit stream, promptly before being sent to Network Interface Module 12 through the data flow behind digital video coding module 11 compressed encodings, increase the process of real-time SM1 computations, make the transmission or the Internet video data flow of final output become enciphered video data stream, and other people is when wanting to watch enciphered video data stream picture content, then must use identical key and identical algorithm that enciphered video data stream is deciphered, thereby increase the fail safe when video data transmits by network.
Shown in goodbye Fig. 3, the digital video code 3 with real-time encrypted function described in the utility model mainly comprises analog video input interface module 10, digital video coding module 11, computations module 13, safety chip 14 and Network Interface Module 12.
Wherein, described analog video input interface module 10, digital video coding module 11, computations module 13 and Network Interface Module 12 are for continuous in regular turn, and described safety chip 14 is to be connected with described computations module 13; Described analog video input interface module 10 receives the analog video signal from video camera 2 or the transmission of other video equipment, and convert this analog video signal to digital video data stream, and should pass to described digital video coding module 11 by described digital video data stream; Described digital video coding module 11 converts thereof into the compressed encoding digital video data stream after receiving this digital video data stream; Described safety chip 14 is mainly in order to preserve the SM1 algorithm and to carry out the SM1 algorithm computation; 13 of described computations modules are when needs carry out computations to the compressed encoding digital video data stream, call safety chip 14 and carry out the SM1 algorithm for encryption, so that this compressed encoding digital video data stream is an enciphered video data stream when Network Interface Module 12 is exported finally.
In addition, described analog video signal carries out processing such as frame decoding, A/D conversion by described analog video input interface module 10, and is converted to the digital video data stream of uncompressed coding.
Compare with ordinary numbers video encoder 1, the utility model is before being sent to Network Interface Module 12 through the video data stream behind the compressed encoding, increase the process of a real-time SM1 computations, thereby make the transmission of final output or Internet video data flow become enciphered video data stream, when if other people wants to watch enciphered video data stream picture content, then at first must use identical key and identical algorithm that encrypted code stream is deciphered, could realize watching enciphered video data stream picture content.
Therefore, after using the digital video code 3 with SM1 algorithm for encryption function described in the utility model, if want to effectively utilizing through the vedio data of encrypting, such as watching picture material, then its only approach can only be that encryption key (also being decruption key) is cracked, thereby has increased the fail safe when video data transmits by network greatly.
In the practical application, because SM1 algorithm and underground, so the assailant is difficult to the SM1 algorithm is analyzed and found out than exhaustive more efficient methods according to the characteristics of algorithm itself, wherein, such as adopting exhaust algorithm, then use the known plain text attack method to crack a SM1 key, on average need carry out 2
127Inferior SM1 cryptographic calculation just can be finished, and will finish this attack, even then use the strongest general processor of present operational capability (can carry out the SM1 decrypt operation 100,000,000 times as dominant frequency 10GHz, per second), also needs 21
27/ (10
8) second=1.7 * 10
30Second=5.4 * 10
22Year.
This shows that the utility model can improve difficulty and the cost of stealing video data content really greatly, strengthen the fail safe of video image information.
Shown in Fig. 4, it is the digital video code example with SM1 algorithm for encryption function that a use general processor and special-purpose safety chip are realized.This described encoder comprises the safety chip 44 and the interface chip 45 of digital video transcoding device 40, video processor 41, data storage 42, program storage 43, special use; After the described digital video transcoding device 40 main analog video signals (referring to the direction of B shown in the figure) of being responsible for importing carry out frame coding, be converted into the Video processing subsystem 410 that digital video signal outputs to video processor 41.Described video processor 41 is that an inside comprises ARM9 (Advanced RISC Machines) processor 411, DSP (Digital Signal Processing, Digital Signal Processing) SOC (system on a chip) (SOC of processor 412, system's control 413, various external apparatus interface 414 and interface, System-on-Chip), wherein, described dsp processor 412 can be finished the compaction algorithms to digital video signal; Described arm processor 411 is responsible for and various external equipments, for example: the safety chip 44 of data storage 42, special use, program storage 43, network interface etc. carry out interface, management, and the compressed digital video signals of handling through dsp processor 412 is carried out computations and packet encapsulation; Described data storage 42 and program storage 43 are used for access data and program respectively; The safety chip 44 of described special use is used for carrying the SM1 algorithm, and assists ARM9 processor 411 to carry out cryptographic calculation, its with video processor 41 between employing SD interface be connected; Described interface chip 45 is the Ethernet physical interface chip, and it is used for realizing being connected between encrypted digital video encoder and the Ethernet.
Claims (2)
1. digital video code with real-time encrypted function, it mainly comprises analog video input interface module, digital video coding module and Network Interface Module; It is characterized in that, comprise that also described analog video input interface module, digital video coding module, computations module and Network Interface Module link to each other in regular turn in order to call the computations module that the SM1 algorithm is encrypted.
2. according to the described digital video code of claim 1, it is characterized in that, comprise that also this safety chip is for being connected in the computations module in order to preserve the SM1 algorithm and to carry out the safety chip of SM1 algorithm computation with real-time encrypted function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201074859U CN201435788Y (en) | 2009-04-23 | 2009-04-23 | Digital video coder having real-time encryption function |
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| CN2009201074859U CN201435788Y (en) | 2009-04-23 | 2009-04-23 | Digital video coder having real-time encryption function |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103051869A (en) * | 2012-11-15 | 2013-04-17 | 山东中孚信息产业股份有限公司 | System and method for encrypting camera video in real time |
| CN103297736A (en) * | 2013-06-13 | 2013-09-11 | 深圳南方汉邦数字技术有限公司 | System and method for data storage and network transmission of video monitoring |
| CN104378649A (en) * | 2014-08-19 | 2015-02-25 | 中国科学院信息工程研究所 | Method and system for encrypting video streams in real time through SM1 cryptographic algorithm |
| CN106658060A (en) * | 2015-07-15 | 2017-05-10 | 数影辰星科技发展（北京）有限公司 | Digital cinema projection processing method and apparatus |
| CN107948589A (en) * | 2017-11-19 | 2018-04-20 | 天津光电安辰信息技术股份有限公司 | A kind of encrypted box device of security video |
| CN113709493A (en) * | 2021-07-23 | 2021-11-26 | 山东云海国创云计算装备产业创新中心有限公司 | Video stream data encryption device, method and equipment of KVM system |
-
2009
- 2009-04-23 CN CN2009201074859U patent/CN201435788Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103051869A (en) * | 2012-11-15 | 2013-04-17 | 山东中孚信息产业股份有限公司 | System and method for encrypting camera video in real time |
| CN103297736A (en) * | 2013-06-13 | 2013-09-11 | 深圳南方汉邦数字技术有限公司 | System and method for data storage and network transmission of video monitoring |
| CN104378649A (en) * | 2014-08-19 | 2015-02-25 | 中国科学院信息工程研究所 | Method and system for encrypting video streams in real time through SM1 cryptographic algorithm |
| CN104378649B (en) * | 2014-08-19 | 2018-10-09 | 中国科学院信息工程研究所 | It is a kind of that real-time encrypted method and system being carried out to video flowing using the close SM1 algorithms of state |
| CN106658060A (en) * | 2015-07-15 | 2017-05-10 | 数影辰星科技发展（北京）有限公司 | Digital cinema projection processing method and apparatus |
| CN107948589A (en) * | 2017-11-19 | 2018-04-20 | 天津光电安辰信息技术股份有限公司 | A kind of encrypted box device of security video |
| CN113709493A (en) * | 2021-07-23 | 2021-11-26 | 山东云海国创云计算装备产业创新中心有限公司 | Video stream data encryption device, method and equipment of KVM system |
| CN113709493B (en) * | 2021-07-23 | 2024-02-09 | 山东云海国创云计算装备产业创新中心有限公司 | Video stream data encryption device, method and equipment of KVM system |
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| GR01 | Patent grant | ||
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Granted publication date: 20100331 |