CN101646060B - Protecting method of data content in storage device - Google Patents
Protecting method of data content in storage device Download PDFInfo
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- CN101646060B CN101646060B CN2009103065933A CN200910306593A CN101646060B CN 101646060 B CN101646060 B CN 101646060B CN 2009103065933 A CN2009103065933 A CN 2009103065933A CN 200910306593 A CN200910306593 A CN 200910306593A CN 101646060 B CN101646060 B CN 101646060B
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Abstract
The invention relates to a technology of a storage device, and solves the problem that the data of the existing storage device is not encrypted and is easy to leak. The invention provides a protecting method of data content in the storage device. The technical scheme thereof can be summarized as follows: firstly, an operator front end completes encryption of data content and carries out transformation by a cable television network, then a set-top box end receives the encrypted data content, stores the data content in the storage device, authorizes a CA management system by the operator front end, and judges whether a user intelligent card has the authority for using the encrypted data content, if not, the decryption is not carried out, if so, the CA system carries out interaction with the user intelligent card by a standard decryption algorithm so as to generate decrypted control words and carry out decryption on the encrypted data content; and finally, the decrypted data content is displayed after being decrypted. The technology of the storage device has the beneficial effects of protecting the benefit of the operator and being applicable to transmission and use of the encrypted data.
Description
Technical field
The present invention relates to the technology of memory device, particularly the technology of data protection in the memory device.
Background technology
The encipherment protection technology is exactly by cryptographic means, realizes the encipherment protection of data in the memory device, and guaranteeing has the user browse data of mandate and watch program, not have the user that authorizes can not browsing data with watch program.Along with improving constantly of people's living standard, people no longer satisfy to keep passive all day in that television set is other and teleview, simultaneously, in order to satisfy the increasing individual demand of people, people also require operator that product as much as possible can be provided, such as education, medical treatment guidance, healthy cuisines etc., all individual demands emerge in an endless stream.This just needs us that a kind of solution is provided, and existing solution has two kinds: one, adopt non-encrypted hard-disc recording: the user can select to carry out timed recording.The EPG system that the user provides by operator, can know what its programs of interest play constantly at, then at it not in TV when next door, adopt the timed recording method, its programs of interest is recorded in the memory device, watch when oneself wanting to watch, this method is not encrypted data, and all users can both watch; Two, the content that adopts hard-disc recording to encrypt: at user side; its method of operation is consistent with first method, but operator is for the protection number one, by the CA authentication management system; the user who only its content is offered mandate uses, and the user of lack of competence can not use.The method that the set-top box end adopts is before content is recorded to memory device, in advance its content is decrypted, and the content after the deciphering is recorded on the memory device such as hard disk/USB, and the later stage can be watched etc.More than two kinds of methods: the defective that self is all arranged.The first method benefits of operators can't be protected; Second method then can't avoid other people to use the content that is recorded in memory device, even some personal informations of leakage oneself etc.
Summary of the invention
Technical problem to be solved by this invention for the data that overcome on the present memory device do not have to encrypt the shortcoming of revealing easily, provides the guard method of data content in a kind of memory device exactly.
The present invention solves its technical problem, and the technical scheme of employing is that the guard method of data content is characterized in that in a kind of memory device, may further comprise the steps:
A. operator's front end CA (Conditional Access) encryption system is finished the encryption of data content, and transmits by cable TV network;
B. the set-top box end is by the Data Receiving handling procedure of DVB (Digital Video Broadcasting) internal standard, and reception ciphered data content also is kept in the memory device;
C. by the front end CA of operator authentication management system, judge according to the ciphered data content of storage whether user smart card has the authority of using this ciphered data content, if not then can not decipher, if then enter next step;
D. by the decipherment algorithm of CA system,, produce decryption control words, this ciphered data content is decrypted by carrying out alternately with user smart card by standard;
E. show after the data content decoding after will deciphering.
Further, the described ciphered data content of step b for the operator front end send by CA encryption system data encrypted.
Concrete, described memory device is the hard disk or the USB flash disk of built-in hard disk or external USB interface.
Further again, described ciphered data content comprises a TS stream file, PMT (Program Map Table) file and a CAT (Condition Access Table) file; Described TS stream file is made up of DVB standard TS bag, comprises content-data, ECM (Entitlement Control Message) data and EMM (Entitlement ManagementMessage) data; Described PMT file and CAT file are the Section list data file of DVB standard.
The invention has the beneficial effects as follows; can make ciphered data content own after being stored in the memory device by above-mentioned steps; still need the smart card of relative users just can be decrypted demonstration, both protected benefits of operators, protected user's privacy again.
Description of drawings
Fig. 1 is the system flow chart of embodiment.
Embodiment
Below in conjunction with drawings and Examples, describe technical scheme of the present invention in detail.
The invention provides the guard method of data content in a kind of memory device; at first operator's front end CA encryption system is finished the encryption of data content; and transmit by cable TV network; the set-top box end is by the Data Receiving handling procedure of DVB internal standard then; reception ciphered data content also is kept in the memory device; again by the front end CA of operator authentication management system; judge according to the ciphered data content of storage whether user smart card has the authority of using this ciphered data content; if not then can not decipher; if then by the decipherment algorithm of CA system by standard; by carrying out alternately with user smart card; produce decryption control words; this ciphered data content is decrypted, shows after the data content decoding after will deciphering at last.
Embodiment
Hard disk or USB flash disk that this routine memory device is built-in hard disk or external USB interface, its system flow chart such as Fig. 1.
At first operator's front end CA encryption system is finished the encryption of data content: at first produce control word (Control Word is called for short CW) by control word generator, with CW the data content is encrypted, this CW is transmission in ECM stream after business cipher key (SK) is encrypted; Business cipher key (SK) is encrypted by the individual distributing key (PDK) relevant with the device address, SK after the encryption transmits in EMM, the ciphered data content is through operator's head end encoder coding, by modulator and multiplexer, transmit in wired network with the TS stream mode, CW after the encryption transmits in wired network by ECM, the SK that CW is encrypted transmits in wired network by EMM, the set-top box end is by the Data Receiving handling procedure of DVB internal standard then, reception ciphered data content also is kept in the memory device, the ciphered data content comprises a TS stream file, a PMT file and a CAT file, wherein, the TS stream file is made up of DVB standard TS bag, comprise content-data, ECM data and EMM data, PMT file and CAT file are the Section list data file of DVB standard, again when the user need use content in the memory device, at first the ciphered data content is taken out, put into the set-top box internal memory, receive corresponding ECM and EMM information simultaneously, and therefrom obtain business cipher key (SK), combined with intelligent card private information, finish deciphering to CW, then with the control word (CW) after the deciphering, finish deciphering, show after the data content decoding after will deciphering at last the storage data content; If the user is not authorized to, then can not obtain legal control word (CW), also just can't finish the deciphering of data content, show after the data content decoding after will deciphering at last.
Claims (5)
1. the guard method of data content in the memory device is characterized in that, may further comprise the steps:
A. operator's front end CA encryption system is finished the encryption of data content, and transmits by cable TV network;
B. the set-top box end is by the Data Receiving handling procedure of DVB internal standard, and reception ciphered data content also is kept in the memory device, and described memory device is the hard disk or the USB flash disk of built-in hard disk or external USB interface;
C. by the front end CA of operator authentication management system, judge according to the ciphered data content of storage whether user smart card has the authority of using this ciphered data content, if not then can not decipher, if then enter next step;
D. by the decipherment algorithm of CA system,, produce decryption control words, this ciphered data content is decrypted by carrying out alternately with user smart card by standard;
E. show after the data content decoding after will deciphering.
2. according to the guard method of data content in the described a kind of memory device of claim 1, it is characterized in that, the described ciphered data content of step b for the operator front end send by CA encryption system data encrypted.
3. according to the guard method of data content in the described a kind of memory device of claim 1, it is characterized in that described ciphered data content comprises a TS stream file, a PMT file and a CAT file.
4. according to the guard method of data content in the described a kind of memory device of claim 3, it is characterized in that described TS stream file is made up of DVB standard TS bag, comprises content-data, ECM data and EMM data.
5. according to the guard method of data content in claim 3 or the 4 described a kind of memory devices, it is characterized in that described PMT file and CAT file are the Section list data file of DVB standard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103065933A CN101646060B (en) | 2009-09-04 | 2009-09-04 | Protecting method of data content in storage device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009103065933A CN101646060B (en) | 2009-09-04 | 2009-09-04 | Protecting method of data content in storage device |
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| Publication Number | Publication Date |
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| CN101646060A CN101646060A (en) | 2010-02-10 |
| CN101646060B true CN101646060B (en) | 2011-06-22 |
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| CN2009103065933A Expired - Fee Related CN101646060B (en) | 2009-09-04 | 2009-09-04 | Protecting method of data content in storage device |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113329025B (en) * | 2021-06-07 | 2022-06-28 | 中国电子科技集团公司第二十九研究所 | Recording data protection method and system based on software authorization embedded symmetric encryption |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1284818A (en) * | 2000-09-29 | 2001-02-21 | 清华大学 | Full digital conditioned receiving method for video broadcost in cable TV network |
| CN1512778A (en) * | 2002-12-31 | 2004-07-14 | 北京中视联数字***有限公司 | Digital TV condition receiver |
| CN1617583A (en) * | 2003-11-11 | 2005-05-18 | 吴怀正 | Digital signal condition receiving system |
| US6975725B1 (en) * | 2000-04-14 | 2005-12-13 | Sony Corporation | Method for standardizing the use of ISO 7816 smart cards in conditional access systems |
| CN101277181A (en) * | 2008-05-04 | 2008-10-01 | 福州大学 | Dynamic multilayer encryption method for managing flow medium digital authority |
-
2009
- 2009-09-04 CN CN2009103065933A patent/CN101646060B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6975725B1 (en) * | 2000-04-14 | 2005-12-13 | Sony Corporation | Method for standardizing the use of ISO 7816 smart cards in conditional access systems |
| CN1284818A (en) * | 2000-09-29 | 2001-02-21 | 清华大学 | Full digital conditioned receiving method for video broadcost in cable TV network |
| CN1512778A (en) * | 2002-12-31 | 2004-07-14 | 北京中视联数字***有限公司 | Digital TV condition receiver |
| CN1617583A (en) * | 2003-11-11 | 2005-05-18 | 吴怀正 | Digital signal condition receiving system |
| CN101277181A (en) * | 2008-05-04 | 2008-10-01 | 福州大学 | Dynamic multilayer encryption method for managing flow medium digital authority |
Non-Patent Citations (1)
| Title |
|---|
| 王平，陈列.也谈数字电视条件接收***.《有线电视技术》.2005,第12卷(第15期),正文第54-57页. * |
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Effective date of registration: 20160414 Address after: 621000 Mianyang province high tech Zone, East Hing Road, No. 35 cotton Patentee after: SICHUAN CHANGHONG ELECTRIC Co.,Ltd. Address before: 1009, room 8, building 610041, high tech incubator Park, South Tianfu Road, Tianfu Road, Chengdu hi tech Zone, Sichuan Patentee before: Homwee Technology Co.,Ltd. |
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