CN102427561B - Method for preventing VOD (Video-On-Demand) programs from being illegally spread and shared - Google Patents
Method for preventing VOD (Video-On-Demand) programs from being illegally spread and shared Download PDFInfo
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- CN102427561B CN102427561B CN 201110325633 CN201110325633A CN102427561B CN 102427561 B CN102427561 B CN 102427561B CN 201110325633 CN201110325633 CN 201110325633 CN 201110325633 A CN201110325633 A CN 201110325633A CN 102427561 B CN102427561 B CN 102427561B
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Abstract
The invention discloses a method for preventing VOD (Video-On-Demand) programs from being illegally spread and shared. The method comprises the following steps of: S101: receiving a scrambled/encrypted program stream and an authorization message by a set top box; S102: acquiring a key for descrambling/decrypting according to the authorization message for decrypting the scrambled/encrypted program stream to obtain a program clear stream; S103: generating a new encrypting KEY by using identification information of the set top box; S104: encrypting the program clear stream by using the encrypting KEY and storing the encrypted program stream on a nonvolatile-memory connected with the set top box; S105: when the programs on the nonvolatile-memory are played, generating a decrypting UKEY corresponding to the encrypting KEY by using the identification information of the set top box; and S106: decrypting the program stream by using the UKEY and playing the decrypted program stream. According to the method disclosed by the invention, the downloaded program data can be effectively prevented from being illegally copied, distributed and shared, the copyright of the programs is guaranteed and high safety is obtained.
Description
Technical field
The present invention relates to digital television techniques field and video on demand techniques field, relate in particular to the illegal method of sharing of propagating of a kind of VOD of preventing program.
Background technology
Along with popularizing of science and technology development and Digital Television, VOD(Video On Demand, video request program) business is used widely, become cable digital TV and realized one of value-added important means.At present, VOD mainly contains NVOD, TVOD and three kinds of forms of Push VOD, wherein, NVOD(near VOD, quasi-video request program) operation cost is low, but number of programs is few, the fast forwarding and fast rewinding inconvenient operation; TVOD(true VOD) need carry out bilateral network transformation, deployment multitude of video vod server, upgrading bi-directional set-top box, cost is higher, the most difficult every the set-top box that also is all needs an independently video channel, and the CHINA RFTCOM Co Ltd limited bandwidth can't satisfy all user's needs simultaneously; Push VOD is the digital TV network system that utilizes tradition unidirectional, the digital content for the treatment of program request is pushed to terminal set top box, and will treats that by set-top box the digital content of program request is saved in the local hard drive, and the user can carry out demand (telecommunication) service in terminal.Push VOD has solved and can't realize the user under the unilateral network environment not under the situation by other order request information return networks, the online problem of enjoying order program service in real time.
But, because Push VOD downloads to the request program data on the local hard drive, be easy to occur with data on the hard disk copy, sharing problem such as distribution, cause some user not need to pay and just can watch request program, will have a strong impact on the interests of operator, program provider and validated user.How to guarantee that the digital content that Push VOD downloads is not the problem that must solve for the interests that guarantee operator, program provider and validated user by illegally sharing with propagating.Problem for the digital content that solves Push VOD download is illegally shared generally adopts real-time encrypted and pre-encryption dual mode at present.Real-time encrypted is real-time encrypted to program stream, and the each program request of user all generates the ECM(Entitlement Control Message separately), the program fail safe is higher, but the CA(condition is received) have relatively high expectations the cost height; The pre-encryption is in advance the program stream that issues to be encrypted, and the ECM of system transmissions is identical after the each program request of user, and ECM remains unchanged for a long period of time, and fail safe is not high.No matter all there is the problem that program and key (being included among the ECM) is kept at local hard drive in real-time encrypted still pre-the encryption, is easy to occur that ECM is cracked or illegally use, and then causes that program is copied, distributes, illegal problem such as shared.
Summary of the invention
Purpose of the present invention is exactly to occur problems such as digital content is illegally copied, distributes and shares easily in order to solve the business of carrying out subsequent applications after Push VOD etc. downloads digital content again, proposed the illegal method of sharing of propagating of a kind of VOD of preventing program, its first program to scrambling/encryption carries out descrambling/deciphering and obtains the program clear stream; Re-use the set-top box identification information relevant with concrete terminal set top box the program clear stream is encrypted, and the program after will encrypting is kept on the memory devices such as local hard drive; When carrying out program request, according to set-top box identification information generating solution decryption key program is decrypted, and then realizes playing.The key that this method is used the encryption and decryption request program is associated with concrete terminal set top box, and the real-time generation of key is not stored, thereby can prevent effectively that the program data on the local memory device from being illegally copied, distributing and sharing, guarantee the interests of operator, program provider and validated user.
To achieve these goals, the present invention adopts following technical scheme:
A kind of illegal method of sharing of propagating of VOD program that prevents comprises the steps:
S101: set-top box receives program stream and the authorization message of scrambling/encryption;
S102: obtain the key of descrambling/deciphering usefulness according to authorization message, scrambling/ciphered program stream is deciphered, obtain the program clear stream;
S103: set-top box utilizes the set-top box identification information of self to generate new encryption key KEY;
S104: use the program clear stream of encryption key KEY to be encrypted, and on the nonvolatile storage that the program stream after will encrypting is stored in set-top box is connected;
S105: when the program on user's program request nonvolatile storage, set-top box utilizes the set-top box identification information of self to generate the decruption key UKEY corresponding with encryption key KEY;
S106: use the program stream of UKEY to be decrypted, play the program stream after deciphering.
The invention has the beneficial effects as follows: the present invention is before the program data that will download stores local memory device into, utilize the set-top box identification information relevant with concrete terminal set top box to generate encryption key, be stored on the local memory device again after the encryption key that use generates is encrypted program data; When playing, recycling set-top box identification information generating solution decryption key is decrypted program data, and then realizes playing; Can realize to use when program data on the local memory device copies on other set-top box or other equipment, can effectively protect the copyright that is stored in the program in the local memory device, prevent that program from being illegally copied, distributing and sharing, and can ensure the rights and interests of operator, program provider and validated user; In addition, the encryption key and the decruption key that utilize the set-top box identification information to generate are real-time generation, do not store, and be safe.
Description of drawings
Fig. 1 is the flow chart of the method for the invention.
Embodiment
The invention will be further described below in conjunction with accompanying drawing and embodiment.
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes a part of the present invention, and illustrated embodiment of the present invention and explanation thereof are used for explaining the present invention, do not constitute improper restriction of the present invention.
As shown in Figure 1, the illegal method of sharing of propagating of VOD program that prevents of the present invention, concrete steps are:
S101: set-top box receives program stream and the authorization message of scrambling/encryption;
S102: obtain the key of descrambling/deciphering usefulness according to authorization message, scrambling/ciphered program stream is deciphered, obtain the program clear stream;
S103: set-top box utilizes the set-top box identification information of self to generate new encryption key KEY;
S104: use the program clear stream of encryption key KEY to be encrypted, and on the nonvolatile storage that the program stream after will encrypting is stored in set-top box is connected;
S105: when the program on user's program request nonvolatile storage, set-top box utilizes the set-top box identification information of self to generate the decruption key UKEY corresponding with encryption key KEY;
S106: use the program stream of UKEY to be decrypted, play the program stream after deciphering.
Above-mentioned set-top box identification information refers to that this set-top box is distinctive, makes this set-top box be different from the information of other set-top box, comprises master chip ID(processor ID), one or more the combination in storage chip ID, safety chip ID, number of set-top box, the intelligent card numbers.
Above-mentioned nonvolatile storage refers to memory devices such as hard disk, portable hard drive, USB flash disk, FLASH memory, SD card; In addition, described nonvolatile storage can also be the network storage equipment that is connected with set-top box.
Above-mentioned is preferred embodiment of the present invention, and on the basis of technical scheme of the present invention, the various modifications of making or distortion still belong to protection scope of the present invention.
Claims (3)
1. one kind prevents the illegal method of sharing of propagating of VOD program, it is characterized in that, comprises the steps:
S101: set-top box receives program stream and the authorization message of scrambling/encryption;
S102: obtain the key of descrambling/deciphering usefulness according to authorization message, scrambling/ciphered program stream is deciphered, obtain the program clear stream;
S103: set-top box utilizes the set-top box identification information of self to generate new encryption key KEY;
S104: use the program clear stream of encryption key KEY to be encrypted, and on the nonvolatile storage that the program stream after will encrypting is stored in set-top box is connected;
S105: when the program on user's program request nonvolatile storage, set-top box utilizes the set-top box identification information of self to generate the decruption key UKEY corresponding with encryption key KEY;
S106: set-top box uses the program stream of UKEY to be decrypted, and plays the program stream after deciphering.
2. the VOD program that prevents as claimed in claim 1 is illegally propagated the method for sharing, it is characterized in that, described set-top box identification information is the information that set-top box is distinctive, be different from other set-top box, is that master chip is one or more the combination in processor ID, storage chip ID, safety chip ID, number of set-top box, the intelligent card numbers.
3. the illegal method of sharing of propagating of VOD program that prevents as claimed in claim 1 is characterized in that, described nonvolatile storage be hard disk, portable hard drive, USB flash disk, FLASH memory, SD card or with the network storage equipment that set-top box is connected in a kind of.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110325633 CN102427561B (en) | 2011-10-24 | 2011-10-24 | Method for preventing VOD (Video-On-Demand) programs from being illegally spread and shared |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110325633 CN102427561B (en) | 2011-10-24 | 2011-10-24 | Method for preventing VOD (Video-On-Demand) programs from being illegally spread and shared |
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| CN102427561A CN102427561A (en) | 2012-04-25 |
| CN102427561B true CN102427561B (en) | 2013-08-28 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130140948A (en) * | 2012-05-17 | 2013-12-26 | 삼성전자주식회사 | Apparatus and method for contents encryption and decryption based on storage device id |
| CN103684745B (en) * | 2013-12-12 | 2019-05-21 | 康佳集团股份有限公司 | Set-top box copy prevention method, set-top-box system and set-top box |
| CN104486677A (en) * | 2014-12-31 | 2015-04-01 | 浙江创佳数字技术有限公司 | Set top box data playing method, playing system and set top box |
| CN104902324A (en) * | 2015-06-26 | 2015-09-09 | 深圳市九洲电器有限公司 | Method and system for protecting personal video recording file |
| CN105430437A (en) * | 2015-11-18 | 2016-03-23 | 深圳市九洲电器有限公司 | Internet company digital content validation method and device |
| CN106454488B (en) * | 2016-10-09 | 2019-06-11 | 深圳创维数字技术有限公司 | A kind of performance recording based on set-top box and back method and system |
| CN106549764A (en) * | 2016-10-14 | 2017-03-29 | 中山大学 | A kind of credible platform module based on UKEY |
| CN110798713B (en) * | 2019-10-25 | 2021-07-13 | 北京东方广视科技股份有限公司 | Time-shifted television on-demand method, terminal, server and system |
| CN113542877B (en) * | 2021-07-13 | 2023-05-05 | 四川长虹网络科技有限责任公司 | PVR resource sharing method, PVR resource sharing system, computer equipment and storage medium |
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| CN1338180A (en) * | 1999-01-20 | 2002-02-27 | 英特尔公司 | System for providing video on demand |
| CN1998237A (en) * | 2003-10-31 | 2007-07-11 | 索尼电子有限公司 | Re-encrypted video-on-demand |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7802286B2 (en) * | 2007-07-24 | 2010-09-21 | Time Warner Cable Inc. | Methods and apparatus for format selection for network optimization |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1338180A (en) * | 1999-01-20 | 2002-02-27 | 英特尔公司 | System for providing video on demand |
| CN1998237A (en) * | 2003-10-31 | 2007-07-11 | 索尼电子有限公司 | Re-encrypted video-on-demand |
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| CN102427561A (en) | 2012-04-25 |
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Owner name: SHANDONG TAIXIN ELECTRONIC CO., LTD. Free format text: FORMER NAME: SHANDONG TAIXIN ELECTRONICS CO., LTD. |
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Address after: Xinluo Avenue high tech Zone of Ji'nan City, Shandong province 250101 silver bearing No. 2008 building 1-501-1 Patentee after: Shandong Taixin Electronics Co., Ltd. Address before: Lixia District, Shandong city of Ji'nan Province Cultural Road 250012 No. 13 Haichen building 6 floor Patentee before: Shandong Taixin Electronics Co., Ltd. |