CN100596197C - System and method for protection of digital electric image and sound video copyright - Google Patents
System and method for protection of digital electric image and sound video copyright Download PDFInfo
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Abstract
The invention discloses a digital film audio/video copyright protection system and a method thereof, including: a server for storing the content of the digital film and a play device for playing the content of the digital film; a software encryption unit, for encrypting the digital film and transmitting to the server; a hardware decryption device, for decrypting the encrypted digital film; a hardware encryption device, for encrypting the decrypted film and transmitting to the play device. The method includes: encrypting the digital film and transmitting to the server; decrypting the digital film encrypted by the software on the server, then transmitting to the play device through the hardware encryption. The invention effectively protect the safety of the content of the digital film, suitable for the play system of the digital system with a plurality of forms, e.g. JPEG2000, MPEG2, H.264, H.263, H.261 and the like.
Description
Technical field
The present invention relates to the encrypting and decrypting method of multimedia audio-video, particularly digital movie audio frequency and video copyright protecting system and method.
Background technology
Along with the development of information technology, digital movie becomes a new industry.Digital movie has that cost is low, fabrication and processing is easy, the transmission issuing way is flexible, the quality of image is high, be easy to advantage such as preservation, and this makes digital movie more and more be subjected to the parent to look at.Along with the digital movie technology reaches its maturity, traditional film movie is replaced by digital movie gradually.
The high-definition digital film of main flow adopts the MPEG2 standard now, and its resolution is 1920*1080, and video code rate is about 40 ~ 60Mbps.The DCI (DCI) that in June, 2005, Qi Jia film manufacturing company in U.S. Hollywood initiated to set up has formally been announced " digital movie standard (v1.0) " (Digital CinemaSystem Specification Ver.1.0).This standard has been determined the industry standard of digital movie, has proposed based on the 2K of JPEG2000 picture format and the high-definition digital film of two kinds of standards of 4K; Wherein 2K digital movie resolution is 2048*1080, and 4K film resolution is 4096*2160.
According to the regulation of DCI standard, film must guarantee the safety of audio frequency, video content in the distribution transmission course.In film movie projector in the past, because film movie self can't be accomplished the encrypting and decrypting to the film movie content, and the feasible encrypting and decrypting to movie contents of the maturation of digital movie technology becomes possibility.
The JPEG2000 format HD digital movie that meets the DCI standard has strict demand to content protecting, and not long based on the high-definition digital film standard issuing time of JPEG2000, and present existing technology still can not satisfy and meets the requirement of DCI standard to content protecting.
Existing digital movie encrypting and decrypting system all is to realize by software.Software decryption is meant that the action of whole deciphering realizes by software.Existing digital movie encrypting and decrypting system based on software decryption, AACS (Advanced Access Content System) for example, CSS (Content ScrambleSystem), they are respectively the copyright protecting systems of HDVD and VCD.AACS software decryption process as shown in Figure 1.
The process of player software deciphering as shown in Figure 1.Through behind the multiple-authentication, Blu-ray Disc or HD DVD CD are given internal memory with encrypted content and key, give processor (CPU) again by internal memory and do deciphering.Content after the deciphering is given video card by CPU and is exported to display by video card again.In conjunction with above-mentioned decrypting process as can be seen, the deficiency of software decryption mainly contains following 4 points:
1. Blu-ray Disc or HD DVD CD are given internal memory encryption key and encrypted content.Because the connection between each parts of computer itself (mainboard, display, blue light or HD DVD drive, video card) all is that line is direct-connected, does not have secrecy provision, the very possible victim of this process is used to steal key.
2. if be weak in operating system or the application software fail safe, the content of internal memory just may be stolen so.
3. the content after the deciphering sends video card to, and video card does not have secrecy provision with being connected of motherboard, and this process also may be attacked, and content may be stolen.
4. video card is not encrypted to the connection between the display and may be attacked and content is stolen yet.
See that with present situation it all is because second deficiency is exactly operating system or application software safety inadequately that AACS is attacked.Without being placed in the internal memory of protection, and the data that obtain in these internal memories just can be walked around AACS system copies data to playout software with content key (Title key).The assailant can steal the data of wanting by seeking the leak on operating system or the software.Therefore, because the opening of common computer, each component of computer does not have secrecy provision such as the connection of internal memory, display card etc., uses the fail safe of software decryption to can not get effective assurance.
Summary of the invention
The objective of the invention is to overcome the existing safety issue that exists based on the digital movie encrypting and decrypting system of software decryption, a kind of digital movie audio frequency and video copyright protecting system based on hardware decryption is provided.
For above-mentioned purpose, the invention provides following technical scheme:
A kind of digital movie audio frequency and video copyright protecting system comprises the playback equipment that is used to store the server of digital cinema content and is used to play digital cinema content; Also comprise:
Software encryption unit sends described server to after being used for digital movie encrypted;
The hardware decryption device is arranged on the described server, is used for the described digital movie deciphering after encrypting;
The hardware encipher device is arranged on the described server, is used for the described digital movie after the deciphering is sent to described playback equipment after encrypting again.
Further, this digital movie audio frequency and video copyright protecting system also comprises: be arranged on the second hardware decryption device in the described playback equipment, the digital movie that is used for encryption that described hardware encipher device is sent is decrypted.
Further, described hardware decryption device and described hardware encipher device are realized by the field programmable logic circuit on incorporate circuit board.
Further, described software encryption unit comprises:
The content key generation module is used for producing at random content key, and sends AES encrypting module and rsa encryption module respectively to;
The AES encrypting module uses described content key that digital cinema content is carried out AES and encrypts;
The rsa encryption module uses the RSA PKI that described content key is encrypted;
Further, described software encryption unit also comprises: the code stream integrate module is used for digital cinema content and encrypted content key after encrypting are incorporated into same code stream.
Further, described hardware decryption device comprises:
RSA private key memory management module is used to store the RSA private key;
The RSA deciphering module utilizes described RSA private key that the content key deciphering of encrypting is obtained content key;
The AES deciphering module utilizes described content key that the described digital cinema content deciphering after encrypting is obtained digital cinema content;
The code stream analyzing module is used for extracting the content key of encryption and the digital cinema content of encryption from transmission code stream.
Further, the key of preserving in the second hardware decryption device in described hardware encipher device is encrypted employed key and is arranged on described playback equipment digital cinema content is corresponding.
A kind of digital movie audio frequency and video copy-right protection method comprises the steps:
Step S1 carries out software cryptography with digital movie and sends to server then;
Step S2 deciphers the digital movie of software cryptography on described server, again by being transferred to playback equipment behind the hardware encipher.
Further, described digital movie audio frequency and video copy-right protection method also comprises:
Step S3, playback equipment is decrypted and plays the digital cinema content of encrypting.
Further, described step S1 specifically comprises the steps:
Step S101, the content key generation module produces content key at random, gives rsa encryption module and AES encrypting module respectively;
Step S102, AES encrypting module use content key that digital cinema content is carried out AES and encrypt, and pass to the code stream integrate module then;
Step S103, the rsa encryption module uses the RSA PKI that described content key is encrypted, and passes to the code stream integrate module then;
Step S104, the code stream integrate module is incorporated into the digital cinema content of encryption and the content key of encryption in the same code stream, sends to described server.
Further, step S2 specifically comprises the steps:
Step S201, server receive the digital cinema content of encryption and the content key of encryption;
Step S202 gives RSA deciphering module with the content key of encrypting, and the RSA deciphering module takes out the RSA private key that is stored in the RSA private key memory management module, utilizes the RSA private key that the content key deciphering of encrypting is content key;
Step S203 gives AES deciphering module with the digital cinema content of encryption and the content key of step S202 gained, and the AES deciphering module carries out contents decryption and obtains digital cinema content;
Step S204, the hardware encipher device carries out exporting to playback equipment after AES encrypts to digital cinema content.
Further, in above-mentioned steps S203, also comprise: will obtain digital cinema content and give the graphics processing unit processing, and finish the step of image decompressor.
Further, the key of the deciphering in used encrypted secret key and the playback equipment is corresponding among the described step S204.
The beneficial effect that the present invention produces is:
The present invention includes the combination of two-stage encrypting and decrypting operation at least, effectively guaranteed the fail safe of digital movie copyright.Wherein, first order cryptographic operation is operated by software encryption unit by the digital movie publisher, and the AES encipherment protection is carried out in the transmission of the content of digital movie, and the rsa encryption protection is carried out in the transmission of content key.First decryption oprerations is operated by the hardware decryption device by the projection merchant, after obtaining digital cinema content, the projection merchant carries out second cryptographic operation and digital cinema content is encrypted and is transferred to playback equipment, and broadcast sets by second decryption oprerations deciphering digital cinema content and plays.These operations realize by FPGA (field programmable logic circuit) on a circuit board that all a circuit board has been realized the content that the common software deciphering needs four parts (CPU, internal memory, video card, blue light or HDVD) to realize in other words.Wherein decryption oprerations only realizes on hardware especially, and this has been avoided software decryption owing to the key from stealing phenomenon that produces alternately between a plurality of parts effectively.Because FPGA can repeat to fire, system has very strong autgmentability really simultaneously.The present invention has protected the safety of digital movie effectively by technique scheme.
Therefore, the present invention has following advantage: (1) good confidentiality has autgmentability preferably; (2) logical construction is simple, is easy to realize; (3) easy to use, simple to operate.
The present invention is applicable to the digital film projector system based on JPEG2000, realizes flexible and convenient, good confidentiality, and hardware realizes that difficulty is moderate, also have more intense autgmentability, go for JPEG2000, MPEG2, MPEG4, H.264, H.263, H.261 wait the digital cinema playback system of multiple form.
Description of drawings
Fig. 1 is a software decryption process schematic diagram of the prior art;
Fig. 2 is a digital movie audio frequency and video copyright protecting system structural representation of the present invention;
Fig. 3 is the software encryption unit structural representation in the digital movie audio frequency and video copyright protecting system of the present invention;
Fig. 4 is the hardware decryption apparatus structure block diagram in the digital movie audio frequency and video copyright protecting system of the present invention;
Fig. 5 is the process block diagram of rsa encryption deciphering of the present invention;
Fig. 6 (a)-Fig. 6 (c) is a kind of digital movie audio frequency and video copy-right protection method flow chart of the present invention;
Fig. 7 is position and the of the present invention system block diagram of the present invention in digital cinema playback system.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, digital movie audio frequency and video copyright protecting system of the present invention and method are further described below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Digital movie audio frequency and video copyright protecting system comprises the playback equipment 200 that is used to store the server 100 of digital cinema content and is used to play digital cinema content, also comprises:
Preferably, digital movie audio frequency and video copyright protecting system also comprises: be arranged on the second hardware decryption device 40 in the described playback equipment 200, the digital movie that is used for encryption that described hardware encipher device 30 is sent is decrypted and plays.
Preferably, described hardware decryption device 20 and described hardware encipher device 30 are realized by field programmable logic circuit (FPGA) on incorporate circuit board.
Preferably, as shown in Figure 3, described software encryption unit 10 comprises:
Content key generation module 11, be used for producing at random content key, and (name of RSA Algorithm is the inventor: Ron Rivest to send AES (Advanced Encryption Standard) encrypting module 12 and RSA respectively to, the abbreviation of AdiShamir and Leonard Adleman initial) encrypting module 13, wherein aes algorithm and RSA Algorithm are cryptographic algorithm well known to those skilled in the art;
Described software encryption unit 10 also comprises: code stream integrate module 14 is used for digital cinema content and encrypted content key after encrypting are incorporated into same code stream.
Preferably, as shown in Figure 4, described hardware decryption device 20 comprises:
Code stream analyzing module 21 is used for extracting the content key of encryption and the digital cinema content of encryption from transmission code stream.
RSA private key memory management module 22 is used to store RSA private key (Device keys).The private key of depositing in each described hardware decryption device is different, uses the RSA private key to carry out the RSA Algorithm deciphering and obtains content key.
AES deciphering module 24 utilizes described content key that the digital cinema content deciphering after encrypting is obtained digital cinema content.
According to foregoing description, for this field technique personnel, described hardware decryption device and described hardware encipher apparatus integration ground are realized accomplishing easily by field programmable logic circuit (FPGA), in the details of this no longer detailed prior art on circuit board.
Preferably, 30 pairs of digital cinema contents of described hardware encipher device adopt aes algorithm to encrypt, employed key, with be arranged on described playback equipment in the second hardware decryption device 40 in the key preserved corresponding, the described second hardware decryption device is decrypted according to the digital cinema content of the encryption that the key of self preserving sends described hardware encipher device.Key in the described second hardware decryption device is stored in static random access memory (static random access memory, SRAM) the inside of circuit board.
As shown in Figure 5, the RSA encryption and decryption of rsa encryption module 13 and 23 pairs of content keys of RSA deciphering module is to adopt rivest, shamir, adelman, and to content key encryption, the RSA deciphering is by the content key deciphering of RSA private key to encrypting by the RSA PKI for rsa encryption.The RSA PKI is can be disclosed, uses the RSA PKI can be to content key encryption, but can not be to the content secret key decryption.The RSA private key can not disclose, and the RSA private key is used for the content secret key decryption, guarantees the safety of content key, thereby guarantees the safety of digital cinema content.
Shown in Fig. 6 (a), a kind of digital movie audio frequency and video copy-right protection method provided by the invention comprises the steps:
Step S1, the publisher carries out the server that software encryption and protection sends to the projection merchant then with digital movie;
Step S2 deciphers the digital movie of software cryptography on described server, again by being transferred to playback equipment behind the hardware encipher.
Preferably, this digital movie audio frequency and video copy-right protection method also comprises:
Step S3 is decrypted and plays the digital cinema content of encrypting by playback equipment.
Preferably, shown in Fig. 6 (b), described step S1 specifically comprises the steps:
Step S101, the content key generation module produces content key at random, gives rsa encryption module 13 and AES encrypting module 12 respectively;
Step S102, AES encrypting module 12 use content key that digital cinema content is carried out AES and encrypt, and pass to code stream integrate module 14 then;
Step S103, rsa encryption module 13 uses the RSA PKI that described content key is encrypted, and passes to code stream integrate module 14 then;
Step S104, code stream integrate module 14 is incorporated into the digital cinema content of encryption and the content key of encryption in the same code stream, sends to server 100.
Preferably, shown in Fig. 6 (c), step S2 specifically comprises the steps:
Step S201, server 100 receive the digital cinema content of encryption and the content key of encryption;
Step S202 gives RSA deciphering module 23 with the content key of encrypting, and RSA deciphering module 23 takes out the Device keys (being the RSA private key) that is stored in the RSA private key memory management module 22, utilizes the RSA private key that the content key deciphering of encrypting is content key.
Step S203 gives AES deciphering module 24 with the digital cinema content of encryption and the content key of step S202 gained, and AES deciphering module 24 carries out contents decryption and obtains digital cinema content;
Preferably, in above-mentioned steps S203, also comprise: will obtain digital cinema content and give graphics processing unit 25 processing, and finish image decompressor and some other image processing process.
Step S204,30 pairs of digital cinema contents of hardware encipher device carry out exporting to playback equipment 200 after AES encrypts.
Preferably, among the described step S204 in used encryption key and the playback equipment used decruption key corresponding.Decruption key in the playback equipment can be stored in the playback equipment.
As shown in Figure 7; according to digital movie audio frequency and video copyright protecting system of the present invention and method; sending out the producer encrypts digital cinema content; and then the content key of the digital cinema content encrypted and encryption is passed to projection merchant's server; server decompresses its deciphering, and then passes to playback equipment after encrypting.Input/output terminal in digital cinema server all is to handle through hardware encipher, can effectively guarantee the fail safe of digital cinema content.
The beneficial effect that the present invention produces is:
The present invention includes the combination of two-stage encrypting and decrypting operation at least, effectively guaranteed the fail safe of digital movie copyright.Wherein, first order cryptographic operation by software encryption unit 10 operation, carries out aes algorithm encipherment protection to the transmission of the content of digital movie by the digital movie publisher, and the rsa encryption protection is carried out in the transmission of content key.First decryption oprerations is operated by the hardware decryption device by the projection merchant, after obtaining digital cinema content, the projection merchant carries out second cryptographic operation digital cinema content is carried out the hardware mode encryption and is transferred to playback equipment, and broadcast sets by second decryption oprerations deciphering digital cinema content and plays.The present invention has protected the safety of digital movie effectively by technique scheme.
Above said content; only for the concrete execution mode of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed in protection scope of the present invention.
Claims (12)
1, a kind of digital movie audio frequency and video copyright protecting system comprises the playback equipment that is used to store the server of digital cinema content and is used to play digital cinema content, it is characterized in that, also comprises:
Software encryption unit sends described server to after being used for digital movie encrypted;
The hardware decryption device is arranged on the described server, is used for the described digital movie deciphering after encrypting;
The hardware encipher device is arranged on the described server, is used for the described digital movie after the deciphering is sent to described playback equipment after encrypting again.
2, digital movie audio frequency and video copyright protecting system according to claim 1 is characterized in that, also comprises: be arranged on the second hardware decryption device in the described playback equipment, the digital movie that is used for encryption that described hardware encipher device is sent is decrypted.
3, digital movie audio frequency and video copyright protecting system according to claim 1 is characterized in that, described hardware decryption device and described hardware encipher device are realized by the field programmable logic circuit on incorporate circuit board.
4, digital movie audio frequency and video copyright protecting system according to claim 1 is characterized in that described software encryption unit comprises:
The content key generation module is used for producing at random content key, and sends AES encrypting module and rsa encryption module respectively to;
The AES encrypting module uses described content key that digital cinema content is carried out AES and encrypts;
The rsa encryption module uses the RSA PKI that described content key is encrypted;
5, digital movie audio frequency and video copyright protecting system according to claim 1 is characterized in that described software encryption unit also comprises: the code stream integrate module is used for digital cinema content and encrypted content key after encrypting are incorporated into same code stream.
6, digital movie audio frequency and video copyright protecting system according to claim 1 is characterized in that, described hardware decryption device comprises:
RSA private key memory management module is used to store the RSA private key;
The RSA deciphering module utilizes described RSA private key that the content key deciphering of encrypting is obtained content key;
The AES deciphering module utilizes described content key that the described digital cinema content deciphering after encrypting is obtained digital cinema content;
The code stream analyzing module is used for extracting the content key of encryption and the digital cinema content of encryption from transmission code stream.
7, digital movie audio frequency and video copyright protecting system according to claim 2; it is characterized in that the key of preserving in the second hardware decryption device on described hardware encipher device is encrypted employed key and is arranged on described playback equipment digital cinema content is corresponding.
8, a kind of digital movie audio frequency and video copy-right protection method comprises the steps:
Step S1 carries out software cryptography with digital movie and sends to server then;
Step S2, step S2 are finished specifically by hardware and comprise the steps:
Step S201, server receive the digital cinema content of encryption and the content key of encryption;
Step S202 gives RSA deciphering module with the content key of encrypting, and the RSA deciphering module takes out the RSA private key that is stored in the RSA private key memory management module, utilizes the RSA private key that the content key deciphering of encrypting is content key;
Step S203 gives AES deciphering module with the digital cinema content of encryption and the content key of step S202 gained, and the AES deciphering module carries out contents decryption and obtains digital cinema content;
Step S204, the hardware encipher device carries out exporting to playback equipment after AES encrypts to digital cinema content.
9, digital movie audio frequency and video copy-right protection method according to claim 8 is characterized in that, also comprises:
Step S3, playback equipment is decrypted and plays the digital cinema content of encrypting.
10, digital movie audio frequency and video copy-right protection method according to claim 8 is characterized in that described step S1 specifically comprises the steps:
Step S101, the content key generation module produces content key at random, gives rsa encryption module and AES encrypting module respectively;
Step S102, AES encrypting module use content key that digital cinema content is carried out AES and encrypt, and pass to the code stream integrate module then;
Step S103, the rsa encryption module uses the RSA PKI that described content key is encrypted, and passes to the code stream integrate module then;
Step S104, the code stream integrate module is incorporated into the digital cinema content of encryption and the content key of encryption in the same code stream, sends to described server.
11, digital movie audio frequency and video copy-right protection method according to claim 8 is characterized in that, in above-mentioned steps S203, also comprises: will obtain digital cinema content and give the graphics processing unit processing, and finish the step of image decompressor.
12, digital movie audio frequency and video copy-right protection method according to claim 8 is characterized in that, encryption key used among the described step S204 is corresponding with the decruption key in the playback equipment.
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| CN200810114749A CN100596197C (en) | 2008-06-11 | 2008-06-11 | System and method for protection of digital electric image and sound video copyright |
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| CN200810114749A CN100596197C (en) | 2008-06-11 | 2008-06-11 | System and method for protection of digital electric image and sound video copyright |
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| CN100596197C true CN100596197C (en) | 2010-03-24 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102521532A (en) * | 2011-11-30 | 2012-06-27 | 深圳市同方多媒体科技有限公司 | Protection method for digital copyright based on encryption chip |
| CN102811124B (en) * | 2012-08-01 | 2015-11-25 | 连云港杰瑞深软科技有限公司 | Based on the system Authentication method of two card trigram technology |
| CN102891754B (en) * | 2012-10-10 | 2015-04-08 | 雷欧尼斯（北京）信息技术有限公司 | Method and device for protecting network digital multimedia copyright |
| CN104219041A (en) * | 2014-09-23 | 2014-12-17 | 中国南方电网有限责任公司 | Data transmission encryption method applicable for mobile internet |
| CN105578208A (en) * | 2015-11-06 | 2016-05-11 | 北京腾锐视讯科技有限公司 | IPTV video encryption transmission system |
| CN105407366B (en) * | 2015-12-24 | 2019-03-26 | 北京腾锐视讯科技有限公司 | A kind of internet video and data file hardware encryption transmission system |
| CN109561345B (en) * | 2018-12-14 | 2021-08-03 | 上海文广科技（集团）有限公司 | Digital movie packaging method based on AVS + coding format |
| CN112733089B (en) * | 2021-01-15 | 2021-09-17 | 深圳市龙影天下信息系统有限公司 | Movie key distribution management method, movie key distribution management device, computer equipment and storage medium |
| CN113656764B (en) * | 2021-08-18 | 2024-05-14 | 天津津航计算技术研究所 | Software encryption method under integrated optimization system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007023610A1 (en) * | 2005-08-26 | 2007-03-01 | Matsushita Electric Industrial Co., Ltd. | Content server device, on-vehicle player device, system, method, and program |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007023610A1 (en) * | 2005-08-26 | 2007-03-01 | Matsushita Electric Industrial Co., Ltd. | Content server device, on-vehicle player device, system, method, and program |
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Inventor after: Zhu Zhenhua Inventor after: Wang Zhensong Inventor after: Wang Xishuang Inventor after: Wei Zheng Inventor after: Wang Guohui Inventor before: Zhu Zhenhua Inventor before: Wang Zhensong Inventor before: Wang Xishuang Inventor before: Wei Zheng Inventor before: Wang Guohui |
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Granted publication date: 20100324 Termination date: 20200611 |