CN101542470B - Method and device for protecting content - Google Patents
Method and device for protecting content Download PDFInfo
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- CN101542470B CN101542470B CN2008800002118A CN200880000211A CN101542470B CN 101542470 B CN101542470 B CN 101542470B CN 2008800002118 A CN2008800002118 A CN 2008800002118A CN 200880000211 A CN200880000211 A CN 200880000211A CN 101542470 B CN101542470 B CN 101542470B
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Abstract
Disclosed are a method of protecting content and a method of processing information. The method of protecting content can include service related information including revocation application information of content from the outside by employing a content management and protection system, and apply or not apply a content revocation process on the content according to the revocation application information. Accordingly, whether to apply a content revocation process can be controlled according to revocation application information.
Description
Technical field
The present invention relates to a kind of method of content and a kind of method of process information protected; More particularly; Relate to the such content protecting and the information processing technology, it can control and whether carry out content and cancel process through being employed in from the specific information signal that the external world receives the included application message (revocation application information) of cancelling.
Background technology
In recent years, along with the commercialization of wire/wireless the Internet, realized intelligence and networking of household electrical appliance etc. etc., quickened digital convergence, this digital convergence is created the service of newtype through the different digital service fusion.Digital convergence is created new profit and the chance of activating business for the service provider provides, and also for the user the user oriented service that can satisfy complicacy and diversified demand is provided.
According to such digital convergence, existing broadcast service is through becoming its area extension into various types of digital broadcast service to content service via wire/radio network.Digital broadcasting can provide the broadcasted content of high-quality through cable network or wireless network, and through with the service that expansion concept is provided of uniting of digital household environment etc.The representative illustration of the service of expansion concept can comprise content sharing service or the like, wherein, uses the personal record device to wait stores broadcast contents and then it is moved to other equipment and uses for digital household environment.
But,, need a kind ofly can prevent the illegal use of content or the security system of derivation for this content sharing service etc.Especially; Be necessary to protect all the time the content in the regional area such as digital household environment; Because when when in content sharing, sending broadcasted content, broadcasted content is (for example CAS (conditional access system)) not in the protection domain of the security system that is used for content protecting.
Therefore, proposed the content protecting management system recently, it can protect related content all the time when broadcasted content is stored in digital household environment, the personal record device etc.The technology that can support the content protecting management system has been done positive research, such as with the management of contents processing, license creation and management, territory, cancel use and process etc. technology.
Technical matters
Technical purpose of the present invention provides a kind of technology, and it can be based on through specific information signal cancelling application message and control whether application content is cancelled process from external world input.
Technical scheme
In order to realize above technical purpose, one aspect of the present invention provides a kind of method of protecting content.This content protecting method can comprise step: receive from external system and cancel application message, cancel application message based on this and judge and cancel procedure schema; And cancel procedure schema based on this and shine upon the information of cancelling, so that with the equipment of distribution of contents to the territory corresponding with built-in system.
In order to realize above technical purpose, the present invention provides a kind of method of protecting content on the other hand.This content protecting method can comprise step: content-based attribute is created and is cancelled application message, and sends this and cancel application message, so that cancel the distribution that application message is come control content based on this.Here, can judge and cancel procedure schema based on cancelling application message, and can shine upon the information of cancelling based on cancelling procedure schema.
In order to realize above technical purpose, another aspect of the present invention provides a kind of method of protecting content.This content protecting method can comprise step: receive the content of distributing based on cancelling information, and use this content according to the authority information that is provided with in advance.Here, can shine upon the information of cancelling based on cancelling procedure schema, and this cancel procedure schema can be based on cancelling application message.
In order to realize above technical purpose, another aspect of the present invention provides a kind of method of process information.This information processing method can comprise step: in adopting Content Management and protection system method of processing information; Reception comprises the service related information of cancelling application message of content from the external world, and cancels application message according to this and come this content application or non-application content are cancelled process.Here, can receive said service related information with the form of FTA (free rating) broadcast singal.
Cancel application message and can be set to any one in first value and second value, this first value indication should application content not cancelled process, and this second value indication should application content be cancelled process.
When cancelling application message and be set to first value, use or step that application content is not cancelled process can comprise step: be included in the customizing messages of the content relevant in permitting and be set to not be employed the particular value that content is cancelled process with content.At this moment, said customizing messages can be relevant with the said content list index table of cancelling.
Simultaneously; This information processing method may further include step: receive exterior content, the reception bulk information relevant with exterior content, convert this exterior content to can in Content Management and protection system, manage and protect content, and create the content of being correlated with said content through the employing bulk information relevant with exterior content and permit.
Here, said bulk information can comprise: comprise the Content Management and the protection information of service regeulations information, be used for protection and organize content in Content Management and protection system; Comprise the service related information of Versatile content protection information, being used for content provides service; And cancel relevant information, be used for forbidding using this content at unauthorized device.
Said Content Management and protection information can comprise following any at least: what be used for control content and duplicate and move duplicates and mobile control information, the Consumption Control information that is used for control content consumption, the propagation control information that is used for the content propagation between the equipment in the control domain, the output control information that is used for control content output and auxiliary content control information.
The content permission can comprise following any at least: content permission flag information comprises the information that is used to identify the content permission; Content license creation person information comprises and is used to identify the founder's of content creating permission information; Accordance/robustness system (regime) information is indicated the accordance/robustness system relevant with content; Authorized domain identification information comprises the identification information that wherein can use the Authorized Domain of said content; The descrambling information of content; And Content Management and protection information.
The information of cancelling can comprise cancels the list index table.Here, this deindex can be the numerical information that when new the cancelling of issue tabulated, just increases particular value.
Advantageous effects
As stated, according to the present invention, can be according to through specific information signal (being the FTA broadcast singal) cancelling application message and control whether application content is cancelled process from external world input.Especially, can content not cancelled process based on cancelling application message and be applied to specific contents.Therefore, when sending content, can utilize easily such as contents such as emergency message and public notices, these contents should be not limited to equipment or territory and seen by anyone.
Description of drawings
Fig. 1 is the block diagram that schematically shows the notion of CMP (Content Management and protection) system;
Fig. 2 shows the conceptual view of the functional structure of the CMP module shown in Fig. 1;
Fig. 3 shows the exemplary views of the form of CMP content permission; And
Fig. 4 shows the process flow diagram according to the method for the process information of the preferred embodiments of the present invention.
The explanation of the Reference numeral of essential element in the accompanying drawing:
CD:CMP equipment
The CM:CMP module
10: acquisition module
20: memory module
30: processing module
40: consumable module
50: derive module
Embodiment
Hereinafter, with present invention will now be described in detail in connection with preferred embodiments with reference to the accompanying drawings, so that those skilled in the art can realize the present invention.In a preferred embodiment of the invention, use the particular technology term from the clear of content.But, it should be understood that the present invention is not limited to specific selected term, and each particular term has comprised similar effect so that reach all technological synonyms of similar purpose.
Fig. 1 is the block diagram that schematically shows the notion of CMP system.
As shown in fig. 1, CMP system 100 formative regions 5.Territory 5 is the set of authorizing CMP equipment (CD), and can refer to the guaranteed zone of reliability for its content legality use.Can in the scope of authority of authorizing, between the CMP equipment (CD) of territory 5 registrations, move and use content.Can in the local environment such as digital household environment, realize territory 5.
CMP equipment (CD) can assignment has the equipment of CMP module (CM).CMP module (CM) is used to protect and manage the content that is input to CMP system 100 from the external world.For example; CMP module (CM) can convert the content that is input to CMP system 100 to the content of particular type, CMP content for example, and can generate the CMP content permission of particular type; Wherein, can use the CMP content through the CMP content permission of this particular type.CMP module (CM) is also through permitting the use of controlling the CMP content based on the CMP content, thus the CMP content of protection and administrative institute's generation.
CMP equipment (CD) can come received content, the CMP information (hereinafter be abbreviated as CMPI) relevant with content, the various content correlated information sheets of being correlated with content or the like through wireless network, cable network or storage medium.Can information be sent to CMP equipment (CD) through form, root and the channel of each qualification.
CMPI can refer to be used for the service regeulations information in 100 protections of CMP system and management CMP content.
CMPI can comprise: duplicate and mobile control information, be used to control duplicating and moving of CMP content; Consumption Control information is used to control the consumption of CMP content; Propagate control information, be used for the propagation of the CMP content between the CMP equipment in the control domain; The output control information is used to control the output of CMP content; Auxiliary CMP content control information or the like.
Content correlated information can comprise content service related information, cancel relevant information, accordance/robustness system (hereinafter being called the C/R system) relevant information or the like.
Service related information can refer to be used for the Versatile content protection information that content provides service.Can this content service relevant information be sent to CMP equipment from the service provider with the form of FTA (free rating) broadcast singal.Service related information can comprise the information cancelling application message, indicate whether to carry out scrambling, remote access control information or the like.
Cancel relevant information and comprise the information that is used for preventing to use content at duplicity equipment, unauthorized device etc.For example, cancelling relevant information can comprise and cancel tabulation (being abbreviated as RL hereinafter) or RL relevant information.Can be from service provider's side, be used for server that CMP cancels management etc. and will cancel relevant information and send to CMP equipment (CD).
C/R system relevant information can refer to such information, and this information is relevant with the application of policies rule about the content of service provider's side.This C/R system relevant information can comprise the information of the C/R system of the content protective system that is applied to content, for example CA (condition access) or DRM (digital copyright management).Can C/R system relevant information be sent to equipment from service provider's side, content protective system service etc.
Fig. 2 shows the conceptual view of the functional structure of the module of CMP shown in Fig. 1.
As shown in Figure 2, CMP module (CM) can comprise acquisition module 10, consumable module 40, derive module 50, memory module 20, and processing module 30.Acquisition module 10, consumable module 40, and derive the notion that module 50 can have the point of place, place existence visit to external world, and memory module 20 can have the notion of internal entity with processing module 30.
For example, acquisition module 10 can receive the content of sending from the external world, with the form that CMP system 100, limits with the content scrambling that receives, and convert the content of scrambling to CMP content (CC).CMP content (CC) can refer to the content type that can be protected and manage for 100 times in the CMP system.Acquisition module 10 also uses the CMPI information and the content correlated information that receive from the outside to generate the CMP content permission (CCL) that is used to use CMP content (CC).
The content that sends to CMP equipment (CD) from the external world can be clean content (cleancontent); Receive this clean content through having the credible transmission method that is guaranteed reliability; It perhaps can be scrambled content; This scrambled content receives has content protective system (for example, CA or the DRM system) protection that is guaranteed reliability.In latter's situation; Related content can receive by CMP equipment (CD), through be included in CAS module or DRM module (being present in CMP module outside) in the CMP equipment (CD) by scrambling, be converted into the form of clean content, and be sent to acquisition module 10 then.Here, can handle the key that obtains to be used for scrambled content through the content correlated information relevant with content carried out ECM (authorization control message)/EMM (entitlement management message).
Simultaneously, the CMP content permission (CCL) that is generated by acquisition module 10 is defined, so that it is associated with corresponding C MP content (CC).At this moment, can CMP content permission (CCL) be included in the CMP content (CC) with embedding form or the form of separating with CMP content (CC).
Fig. 3 shows the exemplary views of the form of CMP content permission (CCL).
As shown in Figure 3, CMP content permission (CCL) can comprise CMP content permission flag information field 62, CMP content license creation person information field 63, C/R institutional information field 64, cancel information field 65, authorized domain identification information field 66, descrambling information field 67, CMPI field 68, CMP content license management data field 69 or the like.
CMP content permission flag information field 62 is the fields that wherein are inserted into CMP content permission flag information.CMP content permission flag information can refer to be used to identify the unique identification information of corresponding CMP content permission.
CMP content license creation person information field 63 is wherein to be inserted into to be used for the field of CMP content license creation person information that sign has been created the founder of CMP content permission (CCL).For example, CMP content license creation person information can refer to create the identification information that corresponding CMP content is permitted the CMP module (CM) of (CCL).
C/R institutional information field 64 is the fields that wherein are inserted into the C/R institutional information relevant with corresponding CMP content (CC).Here, the C/R institutional information can refer to be used for the information of the sign C/R system relevant with CMP content (CC).
The C/R system can refer to the policing rule about content of service supplier's side or content protective system (for example CAS or DRM).A plurality of (for example eight) C/R system can be associated with a CMP content (CC).In other words, can be applied to a CMP content (CC) in the fixed a plurality of Different Strategies rules of service provider's lateral confinement.The C/R institutional information can be configured to comprise and can be set to for example a plurality of bits of ' 1 ' or ' 0 ', and the sign C/R system (for example RL) relevant with the CMP content.
Cancelling information field 65 is the fields that wherein are inserted into the information of cancelling of corresponding CMP content (CC).The information of cancelling comprises the information that can find RL above that, and this RL comprises the territory of the use that limits corresponding CMP content (CC) or the information of CMP equipment (or CMP module).
For example, cancel information and can refer to the RL concordance list.Here, the RL index cancels information field and can comprise RL concordance list (being the tabulation of RL index).Here, the RL index is to be included in being used among the RL to identify the information of RL.For example, the RL index is whenever the new RL of issue just increases by 1 numeral.In other words, the RL index can refer to be used to identify the information of the RL of up-to-date issue.The RL concordance list is the tabulation of RL index and when using the CMP content, helps to find up-to-date RL.Simultaneously, if when using content, need not use RL, then the RL in the RL concordance list for example can be set to ' 0 '.
Authorized domain identification information field 66 is the fields that wherein are inserted into domain identifier information.Domain identifier information can refer to wherein can to use the identification information in the territory 5 of CMP content.If can under the situation of the scope restriction that does not have territory 5, use CMP content (CC), then domain identifier information for example can be set to ' 0 '.
CMP content license management data message field 69 is the fields that wherein are inserted into CMP content license management data message.CMP content license management data message field 69 can comprise length information of CMP content permission (CCL), the information relevant with the publisher who finally issues CMP content permission (CCL) (for example finally issuing the certificate information of the CMP module that the CMP content permits etc.) or the like.
When content being carried out consumable module 40, derived module 50, memory module 20, and during the function of processing module 30, the information that is included in the CMP content permission (CCL) can be with the License Info of the rights of using that act on control content.
Deriving module 50 can be used for CMP content (CC) is exported to another CMP equipment.In order to derive CMP content (CC), not only can consider to be included in the control information among the CMPI of CMP content permission (CCL), and can consider CMP content permission (CCL) the C/R institutional information, cancel information or the like.For example, if the derivation of specific CMP content (CC) is allowed in the control information of CMPI, but uncommitted in C/R institutional information or the like, then can not derive this content.
Fig. 4 shows the process flow diagram according to the method for the process information of the preferred embodiment of the present invention.This illustrates according to being included in the service related information of content and receivedly cancelling the process that application message determines whether to use RL.
With reference to Fig. 4, CMP equipment can be from the service related information (step: S1) of extraneous received content.For example, CMP equipment can be received the FTA broadcast singal from service provider's side joint.Service related information can comprise the information cancelling application message, indicate whether to carry out scrambling, remote access control information or the like.
Cancel application message and be the information of whether the content application content being cancelled process of indicating.Here, content is cancelled process can refer to such process, and it is cancelled tabulation through inspection when the corresponding CMP content of visit and comes disable access to be present in equipment (or CMP module) or the territory in the tabulation of cancelling relevant with corresponding CMP content.
This application message of cancelling can be the information that is set to 1 bit of particular value, and this particular value for example is first value (in the present embodiment, it is assumed that ' 1 ') or second value (it is assumed that ' 0 ' in the present embodiment).Here, when cancelling application message and be set to ' 1 ', it can not indicated should application content cancel process, and when cancelling application message and be set to ' 0 ', it can be indicated and application content cancel process.
Simultaneously, the CMP module can convert content to CMP content and the establishment CMP content permission relevant with the CMP content.
The CMP module that has received service related information extract be included in the service related information cancel application message (step: S2), and the application message of confirming subsequently to extract of cancelling to be set to first value (for example ' 1 ') still be second value (for example ' 0 ') (step: S3).
Be set to first value if cancel application message, then the customizing messages of CMP module CMP content permission is set to indicate not the information of should application content cancelling process.For example, be set to indicate not the value ' 1 ' of should application content cancelling process if cancel application message, then the CMP module can be set to ' 0 ' (step S4) with the information of cancelling (being the RL concordance list) of CMP content permission.Therefore, when using the CMP content, application content is not cancelled process, because the RL concordance list is set to ' 0 ' (step: S5).
On the other hand, when cancelling application message and be set to second value, the CMP module need not carried out special setting up procedure, cancels process because must normally carry out content.In this situation, the tabulation of RL index is included in the information of cancelling (being the RL concordance list) of CMP content permission.Therefore, when the execution content was cancelled process, the CMP module can be through finding the RL that is asked to carry out the process of cancelling (step: S6) in the RL concordance list.
As stated, according to the application message of cancelling of sending, can forbid the specific contents application content is cancelled process through the FAT broadcast singal.When send such as emergency message and public notice, be not limited to equipment or territory and should be by content that anyone sees the time, can utilize this handling procedure.
Simultaneously, the information that is included in the service related information and indicates whether to carry out scrambling can refer to indication when creating the CMP content whether from the purpose of content protecting and use the information of scrambling.For example, the information that indicates whether to carry out scrambling can be the information of 1 bit, and it is set to particular value, for example ' 1 ' or ' 0 '.Here, when the information that indicates whether to carry out scrambling was set to ' 1 ', it can indicate the scrambling that should not carry out content, and when the information that indicates whether to carry out scrambling was set to ' 0 ', it can indicate the scrambling that carry out content.
Indicate whether that the information of carrying out scrambling can be inserted in the specific fields (for example assist control information insertion field) of the CMPI of the CMP content permission relevant with related content.
In addition, be included in the undelegated control information of distribution again that remote access control information in the service related information can refer to be used for preventing content.This remote access control information can be the information of 2 bits, and it can be set to four kinds of values, for example ' 0 ', ' 1 ', ' 2 ' and ' 3 '.For example, ' 0 ' can indicate the remote access that is allowed to through the Internet or another kind of transmission network, and ' 1 ' to ' 3 ' can indicate the strict remote access that progressively requires.
This scrambling remote access control information can be inserted in the specific fields (for example propagating the specific fields of control information) of CMPI of the CMP content relevant with related content permission.
Hereinafter, the service provider who has described when for example broadcasting station when (be called end device) uses the process cancelled to CMP equipment and this CMP equipment with this distribution of contents another CMP equipment in the territory with content propagation.
The broadcasting station is at first created and is cancelled application message, and it indicates whether that application is cancelled to certain content.Here, the broadcasting station can content-based attribute be created and is cancelled application message.For example, preferably, under the situation of not using the process of cancelling, in all devices, see the information such as emergency message.Like this, the broadcasting station can be created and cancelled application message, and it comprises that indication should not use the information of the information of cancelling.
Thereafter, the broadcasting station can will be cancelled application message through for example FTA signal and send to CMP equipment.This CMP equipment can receive cancels application message, and according to the application of instruction of cancelling application message or do not use the process of cancelling to the use of related content.
For example, CMP equipment can receive cancels application message, and cancels application message based on this and decide and cancel procedure schema.In order distribution of contents to be arrived the miscellaneous equipment in territory, CMP equipment can shine upon the information of cancelling based on cancelling procedure schema.Here, when cancelling procedure schema indication application model, CMP equipment can shine upon the information of cancelling, so that the derivation that comes limiting content based on the information of cancelling that is provided with in advance.When cancelling procedure schema and indicate non-application model, CMP equipment can shine upon the information of cancelling, so that based on the information of cancelling that is provided with in advance and the not derivation of limiting content.When mapping, CMP equipment can be that the information of cancelling is shone upon on the basis with each tabulation.For example, CMP equipment can based on cancel procedure schema with each cancel the tabulation be that the information of cancelling is shone upon on the basis.In addition, cancel the attribute of application message can be content-based with equipment at least one, and can be disposable or non-once property.When the attribute right and wrong were disposable, CMP equipment can be stored and cancel application message.
Simultaneously, end device can receive the content of distributing based on cancelling information from CMP equipment, and uses this content according to the authority information that is provided with in advance.Here, can be that the information of cancelling is shone upon on the basis with each tabulation based on cancelling procedure schema, and cancel procedure schema can be based on cancelling application message.
Though combined embodiments of the invention illustrated in the accompanying drawings to describe the present invention, the invention is not restricted to this.Be apparent that for those skilled in the art, under situation about not departing from the scope of the present invention with spirit, can carry out various replacements, modification and change it.
Claims (6)
1. method of protecting content, said method comprises:
Indicate whether the data that content application is cancelled are confirmed to cancel pattern based on receiving from external system;
The mode map of confirming of cancelling is become to cancel information, and the wherein determined pattern of cancelling comprises first or second pattern that said first or second pattern is not indicated respectively should or should application content cancel process;
Generation comprises the permission of the information of cancelling of being shone upon; And
With said permission and said content associated.
2. method according to claim 1 further comprises: receive the broadcast singal that comprises the data that receive.
3. method according to claim 1, wherein, if the determined pattern of cancelling comprises said first pattern, the step that mode map becomes to cancel information of cancelling that then will confirm further comprises:
The said special parameter of cancelling in the information is not set to indicate should use the particular value that said content is cancelled process.
4. equipment of protecting content, said equipment comprises:
Be used for based on receive the device that indicates whether the data that content application is cancelled are confirmed the pattern of cancelling from external system;
What be used for confirming cancels the device that mode map becomes to cancel information, and the wherein determined pattern of cancelling comprises first or second pattern, and said first or second pattern is not indicated respectively should or should application content cancel process;
Be used to generate the device of the permission that comprises the information of cancelling of being shone upon; And
Be used for said permission and said content associated device.
5. equipment according to claim 4 further comprises interface, and this interface is configured to receive the broadcast singal that comprises the data that receive.
6. equipment according to claim 4 wherein, if the determined pattern of cancelling comprises said first pattern, then becomes the determined mode map of cancelling to cancel information and further comprises:
The said special parameter of cancelling in the information is set to indicate does not use the particular value that said content is cancelled process.
Applications Claiming Priority (17)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US88574807P | 2007-01-19 | 2007-01-19 | |
| US60/885,748 | 2007-01-19 | ||
| US88613007P | 2007-01-23 | 2007-01-23 | |
| US60/886,130 | 2007-01-23 | ||
| US88794907P | 2007-02-02 | 2007-02-02 | |
| US60/887,949 | 2007-02-02 | ||
| US88979407P | 2007-02-14 | 2007-02-14 | |
| US60/889,794 | 2007-02-14 | ||
| US89026907P | 2007-02-16 | 2007-02-16 | |
| US60/890,269 | 2007-02-16 | ||
| US89127507P | 2007-02-23 | 2007-02-23 | |
| US60/891,275 | 2007-02-23 | ||
| US89405007P | 2007-03-09 | 2007-03-09 | |
| US60/894,050 | 2007-03-09 | ||
| US98045207P | 2007-10-17 | 2007-10-17 | |
| US60/980,452 | 2007-10-17 | ||
| PCT/KR2008/000379 WO2008088202A1 (en) | 2007-01-19 | 2008-01-21 | Method for protecting content |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101542470A CN101542470A (en) | 2009-09-23 |
| CN101542470B true CN101542470B (en) | 2012-04-11 |
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|---|---|---|---|
| CNA2008800002137A Pending CN101542471A (en) | 2007-01-19 | 2008-01-21 | Method for protecting content and method for processing information |
| CN2008800002118A Expired - Fee Related CN101542470B (en) | 2007-01-19 | 2008-01-21 | Method and device for protecting content |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008800002137A Pending CN101542471A (en) | 2007-01-19 | 2008-01-21 | Method for protecting content and method for processing information |
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| CN (2) | CN101542471A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1313550A (en) * | 1999-11-08 | 2001-09-19 | 松下电器产业株式会社 | Canceling information update method, device and recording medium |
| CN1397123A (en) * | 2000-10-20 | 2003-02-12 | 索尼公司 | Data reproducing/recording apparatus, method and listupdating method |
| CN1636377A (en) * | 2002-02-21 | 2005-07-06 | 皇家飞利浦电子股份有限公司 | Copy-protection by alteration of control signals |
| CN1764907A (en) * | 2003-03-26 | 2006-04-26 | 松下电器产业株式会社 | Revocation information transmission method, reception method, and device thereof |
| WO2006115362A1 (en) * | 2005-04-25 | 2006-11-02 | Samsung Electronics Co., Ltd. | Domain management method and apparatus |
-
2008
- 2008-01-21 CN CNA2008800002137A patent/CN101542471A/en active Pending
- 2008-01-21 CN CN2008800002118A patent/CN101542470B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1313550A (en) * | 1999-11-08 | 2001-09-19 | 松下电器产业株式会社 | Canceling information update method, device and recording medium |
| CN1397123A (en) * | 2000-10-20 | 2003-02-12 | 索尼公司 | Data reproducing/recording apparatus, method and listupdating method |
| CN1636377A (en) * | 2002-02-21 | 2005-07-06 | 皇家飞利浦电子股份有限公司 | Copy-protection by alteration of control signals |
| CN1764907A (en) * | 2003-03-26 | 2006-04-26 | 松下电器产业株式会社 | Revocation information transmission method, reception method, and device thereof |
| WO2006115362A1 (en) * | 2005-04-25 | 2006-11-02 | Samsung Electronics Co., Ltd. | Domain management method and apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101542471A (en) | 2009-09-23 |
| CN101542470A (en) | 2009-09-23 |
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