CN100556135C - The transmission of content and the method for protection and device - Google Patents
The transmission of content and the method for protection and device Download PDFInfo
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- CN100556135C CN100556135C CNB2006101321077A CN200610132107A CN100556135C CN 100556135 C CN100556135 C CN 100556135C CN B2006101321077 A CNB2006101321077 A CN B2006101321077A CN 200610132107 A CN200610132107 A CN 200610132107A CN 100556135 C CN100556135 C CN 100556135C
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Abstract
A kind of transmission of content and protection carry out method and device.By import the position in the IPMP tool information ahead of content stream data and as the position of processing module in advance in the IPMP in content decoders the place ahead tool management function portion; obtain the IPMP instrument according to the IPMP tool information, can define the attainable standard that is applicable to MPEG-n IPMP (intellectual property right management and protection) system definitely.In order to improve the compatibility of its fail safe and terminal for different IPMP systems, when proposing 2 layers of structure, the output of definition authentification of user.By in the obtaining of IPMP instrument, different characteristics being defined, simplified the complexity in the terminal.
Description
The application is that application number is: 02800507.4, the applying date is: the dividing an application of the patent application of 2002.2.26.
Technical field
The present invention relates to the transmission and the protection of content; particularly can be by the application program of different IPMP system protections by different IPMP (Intellectual Property Management and Protection, intellectual property right management protection) system's utilization and same content about protected content.
Background technology
Along with the progress of the communication technology, make people can arbitrarily easily the time multi-medium data or delivery of content to any desirable place, and more and more higher to the requirement of delivery of content.Make the user when being satisfied with its convenience and flexibility, can be simply and enjoy the information of this content expeditiously.And on the other hand,, yet worry again that simultaneously the property of oneself is illegally used though the owner of content also wishes to satisfy client's requirement.Therefore, must resolve the contradiction of this 2 aspect.
Now, developed the multiple resist technology that is used to protect content of data encryption, eletric watermark, password etc.Can be installed in these in most delivery of content application program.For content is transmitted under the state that is protected, can make different systems adopt different types of mechanism and resist technology.In this case, the operative installations of whole terminal and content can only be regenerated or the content that is provided by same content provider is provided.That is, if changed terminal or the device the different content of can not regenerating.
In the mpeg standard tissue, comprising the standardization effort of the IPMP system of terminal.Which type of IPMP instrument no matter whole terminals use, and all renewable quilt is according to the protected content of same IPMP Standard Encryption and protection.Such terminal is made of the content decoders of carrying out sound and picture decoding, and before can encrypting content and regenerate, terminal can be removed the protection of the content that is in protected state.Therefore, need know protection information, i.e. IPMP tool information, and can in terminal, be used.
On the other hand, make distributors can select to be fit to the flexibility of instrument of the IPMP system of oneself, can not be fixed on the IPMP instrument in definite instrument in advance in order to have.Like this, in order to improve flexibility and fail safe simultaneously, must define the method and the interface of certain standard.
According to the authentification of user of conventional art and obtaining of IPMP instrument, for example, as MPEG-2 or MPEG-4, no matter whether use identical decoding, corresponding each the different distributors of the installation of its instrument has very big difference.In this case, realize regeneration in the same terminal for being difficult in by the different different contents that the content provider provided.In other words, protected same content can not realize regeneration under different IPMP systems.
Summary of the invention
(the technical problem to be solved in the present invention)
The present invention is in order to utilize protected same content in different IPMP systems, definition has the IPMP system of same structure.Provide a kind of make the user that the IPMP system is installed can constitute securely from be encoded to the passage transmission, at last to the standard method of the total system of terminal.
(solution)
At first, the IPMP tool information is placed the position ahead of the content stream data of the reality beyond the content ID, be defined as 1 the established data bag that comprises following project.
The type of the IPMP instrument that uses in order to protect content.
The location type of IPMP instrument.
Can obtain the position of IPMP instrument.
IPMP tool information sign is configured in the position ahead of described packet as title.IPMP tool management function is positioned at the place ahead of content decoders, is configured to 1 module can carrying out syntactic analysis to the IPMP tool information that transports by content stream data and obtain the IPMP instrument of the protection of removing content stream data.
In order to improve the compatible of fail safe and terminal and to have imported 2 layers of safety configurations by the output important document for different arbitrarily user authen methods is determined.
The IPMP appliance id is defined by the information table of regulation, and this information table can encoded in advance or be downloaded in the terminal.For same IPMP instrument is used same IPMP appliance id, must make the supplier's side and the same information table of end side reference of content.
Terminal can be carried out coding in advance by certain the existing IPMP instrument that is considered to standard I PMP instrument, and in terminal, under the situation that its ability allows,, can download the IPMP instrument of licensed login according to the IPMP tool information that sends by content stream data.Encryption key is further encrypted on the basis of 2 layers of safety configurations, and can be inserted in the IPMP data field, together is delivered to terminal with content stream data.In content provider's one side, content is carried out coding by the existing coding techniques that uses MPEG-2 or MPEG-4 etc., and is encrypted by the existing IPMP instrument that uses DES or AES etc.Also can before coding, in content, embed eletric watermark.
Simultaneously, content ID makes information etc. according to content copyright information, content to generate.The IPMP tool information is according to generating for the IPMP tool information of protecting content to use.The IPMP tool information comprises the position of IPMP appliance id, location type and IPMP instrument.IPMP tool information sign is placed in the position, front, connects IPMP tool information, content ID and content thereafter.
Though any terminal can both obtain content or accessed content, can not regenerate under the proper usage license and the situation corresponding with it or the IPMP instrument having.In end side, content stream data is to be transmitted through IPMP tool management functional module, obtains the IPMP instrument at Local or Remote after the checking of having carried out the IPMP instrument.The IPMP instrument of being obtained can use in terminal at this moment.
Content stream data is by content decoders, and IPMP data decode module starts user authentication module then, and Termination ID, content ID and IPMP appliance id by the user is provided transmit request to the content provider.After head and the tail finish authentification of user in good condition, transmit licence to terminal.At last, understand encrypted key, and understand encrypted content, make content decrypted, thereby can in terminal, regenerate.
(beneficial effect of conventional art relatively)
By importing the front that IPMP tool information bag is configured in content stream data; and the IPMP tool information carried out syntactic analysis; obtain the IPMP tool management functional module of IPMP instrument, realized the regeneration of protected same content in different types of IPMP system.
2 layers of structure have not only improved fail safe, and have fixed the output structure of different user authentication method, have improved the compatibility between the terminal.In such structure, authentification of user can increase mutual usability according to installing with diverse ways towards different suppliers.Define different characteristics by complexity with flexibility, thereby can make different terminals can utilize same standard, enlarged the scope of utilizing at the terminal that is used to obtain the IPMP instrument.
The invention provides a kind of method of in terminal, reading content, the dispensing that described terminal is accepted content and comprised the data flow of intellectual property right management protection tool information sign, content ID and intellectual property right management protection tool information from the supplier, it is characterized in that, comprising: data are flow to the step that the lang method is analyzed; Detect the step of intellectual property right management protection tool information sign, content ID and intellectual property right management protection tool information; Read the step of the information of the information of the detected intellectual property right management protection intellectual property right management that tool information comprised protection appliance id, the information of location type ID and the position that instrument is protected in intellectual property right management; According to the information of intellectual property right management protection appliance id, determine the step of code reading instrument that the password that is adopted in the content is understood; According to the information of location type ID, detect the step of the type of the position that described code reading instrument exists; With the information of protecting the position of instrument according to intellectual property right management, specifically determine the step of the position that described code reading instrument exists.
The present invention also provides a kind of device of reading content in terminal, this terminal receives from the supplier and accepts content transmitted and comprise intellectual property right management protection tool information sign, content ID and intellectual property right management to protect the data flow of tool information content and read the terminal installation of content, it is characterized in that this device comprises: data are flow to the device (300) that the lang method is analyzed; Detect the device (301,202) of intellectual property right management protection tool information sign, content ID and intellectual property right management protection tool information; Protect the information of the position of instrument to obtain the device (301,213,214,215) that instrument is protected in intellectual property right management with reading according to the information of the detected intellectual property right management protection intellectual property right management that tool information comprised protection appliance id, information and the intellectual property right management of location type ID; According to the information of intellectual property right management protection appliance id, determine the device (301,205,206) of code reading instrument that the password that is adopted in the content is understood; According to the information of location type ID, detect the device (301,219) of the type of the position that described code reading instrument exists; With the information of protecting the position of instrument according to intellectual property right management, specifically determine the device (302,220) of the position that described code reading instrument exists.
Description of drawings
Fig. 1 is the figure of the expression IPMP system in the past that carries out delivery of content and protection related to the present invention.
Fig. 2 is the figure that expression places the IPMP tool information bag of content stream data leading section.
Fig. 3 be expression IPMP tool management function cooperate MPEG-4 IPMP system carry out work state figure.
Fig. 4 is that expression IPMP tool management function cooperates the MPEG-2 system to carry out the figure of the state of work.
Fig. 5 is that the expression user authentication module cooperates MPEG-4 IPMP system and IPMP tool management functional module to carry out the figure of the state of work.
Fig. 6 is that the expression user authentication module cooperates MPEG-2 system and IPMP tool management functional module to carry out the figure of the state of work.
Fig. 7 is the pie graph of expression with the content ID form of 8 square frames formations.
Fig. 8 is the form pie graph of expression authentication result.
Embodiment
Fig. 1 represents to relate to IPMP of the present invention system.Different content provider A, the B of the content owner of unit 10 by unit 11,15 and 19, and C content is provided.3 groups of IPMP systems are respectively different IPMP systems.About the obtaining, verify of IPMP instrument, be to use shared or different authentification of user instruments of from shared IPMP instrument table, selecting etc. to carry out. Unit 12,16 and 110 can be different user authen method, also can be identical user authen method.The adquisitiones of IPMP instrument is represented in unit 13,17 and 111 these are to use from shared IPMP instrument table and choose the IPMP instrument.
Therefore, even the coding of content or content are utilized the such mutual difference of terminal shown in unit 14,18 and 112, also can from shared table, obtain the IPMP instrument.Even what content provider B transmitted is protected content, in terminal A, also can from shared table, obtains the employed IPMP instrument of content provider B, and can regenerate by the IPMP instrument of obtaining.In the present embodiment, so-called instrument is meant to be understood encrypted content and reads the instrument that is embedded in the electronic watermark information in the content in advance, but can comprise that also instrument is read in authentication and the setting means etc. of charging.Promptly technology in the past is, the protected content of transmitting by content provider B be merely able to the signatory terminal B of content provider B on regenerate, with among signatory terminal A, the C of content provider B then can not regenerate.But, in the present invention, the protected content of transmitting by content provider B not only can with the signatory terminal B of content provider B on, but also can with on signatory terminal A, the C of content provider B not regenerate.
For such system is provided, must use the following device that transmits content from the supplier.
That is: by code conversion the device of content stream data content;
The device that uses the data encryption instrument that the content stream data of numeralization is encrypted;
Generate the device of the content ID corresponding with content;
Generation is included in the device of IPMP (intellectual property protection) tool information of necessary information when using the data encryption instrument that content data encrypted stream is deciphered;
Generate the device that there is the IPMP tool information sign of IPMP tool information in expression;
Construct the device of data flow by IPMP tool information sign and connected IPMP tool information, content ID and encrypted content stream data.
In addition, for the data flow that receives the content that transmits from the supplier and read content, need have the terminal installation of following formation:
The parser device of data flow;
Detect the device of IPMP tool information sign, content ID and IPMP tool information;
Obtain the device of IPMP instrument according to detected IPMP tool information.
Below, these devices are described.
Top part among Fig. 2 is represented the formation of the data flow of ordering by the P among Fig. 1, the data flow that expression is prepared by supplier A.At first, the packet header 201 of information data is arranged, connect IPMP tool information bag 202 thereafter.Also meaningful packet header 203 connects content bag 204 thereafter.In packet header 201 or IPMP tool information bag 202, comprise IPMP tool information sign, be used for expression and have the IPMP tool information.Also can be included in IPMP tool information sign in other positions in the data flow.For example, also can be included in the optional position of square frame 203 or 204.In IPMP tool information bag 202, content ID and content ID are right with the information formation information of IPMP instrument, and exist one or more information right.Here, expression has 2 information right.At the 1st information centering content ID1 205 and content ID1 IPMP tool information 206, at the 2nd information centering content ID2 207 and content ID2 IPMP tool information 208.The content 1 of content bag 204 comprises the content (for example, music 1) of the content ID1 of corresponding the 1st information centering, and content 2 comprises the content (for example, music 2) of the content ID2 of corresponding the 2nd information centering.Also can use different data encryption instruments for content 1 with content 2.
Mid portion among Fig. 2 is represented the IPMP information 206 that detailed content ID1 uses.The information that comprises a plurality of suppliers' IPMP instrument here.In example shown here, the IPMP tool information 211 of content supplier A and the IPMP tool information 212 of content provider B.Self-evident, IPMP tool information that also can content supplier C, content provider D.As the IPMP tool information of content provider A, include IPMP appliance id 213, IPMP implementation name 214, IPMP tool location recognition factor 215.IPMP appliance id 213 for example is the instrument that is used to understand encrypted data, promptly is confirmed as decoding tool.IPMP implementation name 214 is used to represent the title of decoding tool.215 expressions of IPMP tool location recognition factor can obtain the position (for example being the homepage of the Internet) of decoding tool.Also can omit IPMP implementation name 214.Because in each terminal of terminal use, record the table 1 that will be explained below in advance, so, as long as known IPMP appliance id 213, just can from table 1, obtain IPMP implementation name 214.
IPMP appliance id 213, as shown in table 1, determine with the ID of 8 formations, and general in whole terminating machines.As IPMP tool location recognition factor 215,, for example write the address of homepage as what the following describes.
Following part among Fig. 2 is represented the particular content of IPMP tool location recognition factor 215.Comprise the information that can obtain the implementing procedure determined by IPMP implementation name 214 in IPMP tool location recognition factor 215, concrete is to comprise location type 219 and detail location 220.As location type 219, for example be expressed as the Internet, as particular location 220, for example be expressed as the address of homepage.
Fig. 3 represents the formation of terminal A.Terminal A has the IPMP tool management function portion 300 that receives external input signal.In IPMP tool management function portion 300, comprise IPMP tool information syntactic analysis portion 301, IPMP instrument obtaining section 302 and the portion of preservation as a result 303.The portion of preservation as a result 303 is connected with IPMP tool database 321.In IPMP tool database 321, store the data of table 1 and the IPMP tool software of obtaining.In addition, in IPMP tool database 321, also comprise the module 322 that is used to understand key.IPMP tool management function portion 300 is connected with decoder interface 304.In decoder interface 304, comprise decoder 305.
The binary data (binary data for scene) that comprises voice codec buffer 306, picture decoding buffer 307, goal descriptor decoding buffer 308, scene after decoder interface 304 is buffer 309 and the IPMP buffer 310 of decoding of decode (BIFS).The binary data of scene comprises expression by the data of the allocation position of the scene of section.306, the also in store encrypted state of the voice signal of 307,309 output, picture signal and BIFS signal.
In the present embodiment, 331,332,333 carry out descramble at the control point.Carrying out the necessary instrument of descramble (software) is to obtain from IPMP system 324 (comprising IPMP tool database 321).
In the present embodiment, 334,335,336 carry out the detection of eletric watermark at the control point.Carrying out eletric watermark, to detect necessary instrument (software) be to obtain from IPMP system 324 (comprising IPMP tool database 321).
Sound is separated synthetic buffer 315 and is connected with synthesizer 318 by control point 337, and the synthetic buffer 316 of image is connected with synthesizer 318 by control point 338, and BIFS decipher 317 passes through control point 339 and BIFS and sets 319 and be connected with synthesizer 318.Synthesizer 318 further with as the leasing system of exporting 320 is connected.
In the present embodiment, at the control point 337,338,339 also carry out other eletric watermark detection and duplicate the processing of protection.Carrying out the eletric watermark detection and duplicating the necessary instrument of protective treatment (software) is to obtain from IPMP system 324 (comprising IPMP tool database 321).
Content stream data shown in Fig. 2 for example is the data flow of MPEG4, is imported in the IPMP tool management function portion 300, detects content data packets 202 by detecting packet header 201, then it is delivered to IPMP tool information syntactic analysis portion 301.In addition, detected content data packets 204 is sent to the decoder interface 304 of next section by packet header 203.The IPMP tool information bag 202 that is detected is understood by IPMP information syntactic analysis portion 301, thereby determines the supplier in the source of transmitting as this data flow.
In IPMP instrument obtaining section 302,, then read the information 211 of the employed IPMP instrument of supplier A A if the supplier is supplier A.If the supplier is supplier B, then read the information 212 of the employed IPMP instrument of supplier B B.The result who is read out temporarily is kept at the portion of preservation as a result 303, and is saved in the IPMP tool database 321.
In addition, the content data packets 204 that is passed to decoder interface 304 is decoded into voice signal, picture signal, OD signal, BIFS signal, and is sent to treatment circuit separately.Carry out above-mentioned processing then.
Below, the present invention is divided into 4 parts, each several part is described in detail.
IPMP tool information and IPMP tool management function
Below, IPMP tool information and IPMP tool management function are described.IPMP tool information and IPMP tool management function are defined as follows:, be that the IPMP information definition is " for the IPMP instrument that makes regulation is correctly handled necessary information to the content of protected regulation " about the notion of IPMP.Be the IPMP instrument definition that " so-called IPMP instrument is meant the module of carrying out the IPMP feature operation of authentication, encryption, eletric watermark etc. with the method for regulation.The IPMP instrument can be carried out the IPMP feature operation more than 1.Also can be used as the IPMP instrument of other IPMP instruments of adjustment.”。
Proposed to import the scheme of the definition of IPMP tool information in the present invention.That is, " so-called IPMP tool information is meant by IPMP tool management function the necessary information of IPMP instrument is discerned and obtained to the IPMP instrument.It comprises unique recognition factor of IPMP instrument, the location recognition factor of IPMP instrument and the relevant information between IPMP instrument and the content ID.The IPMP instrument should be present in all initial packets of content stream data.”。
The scheme of IPMP tool management function has been proposed in addition.That is, " so-called IPMP tool management function only is meant with by the IPMP tool information is handled, and obtain to content stream data all utilize the imformosome of necessary IPMP instrument for purpose.IPMP tool management function portion should place before the content decoders.”。
IPMP information
As being defined in the IPMP tool information, should be it as all initial packet allocation positions of content stream data.Specifically being configured in of this packet provided the simplest and the clearest diagram among Fig. 2.IPMP tool information bag should comprise to not Bao Hu content utilize necessary whole IPMP tool information.When comprising multiple content in the content, for example the part 1 in content is provided by content provider A, part 2 is under the situation that is provided by content provider B, and the information of setting up dependency relation with different IPMP instruments should form marshallingization according to content ID separately.
The form of content ID (cIDf) is defined as shown in Figure 7 the content ID form that partly is made of 8 square frames.In Fig. 7, for example " contents attribute " square frame comprises the information of author and content, whom comprises in " copyright attribute " square frame, possesses the details of the relevant copyright background of form etc.Each ID of content should be distributed in for example content owner ID, the content copyright person of possessing ID and tape deck ID respectively in the specified attribute square frame.Under the situation of the content record that carries out as work, the cameraman is reasonably made up the content ID coding scheme of such complexity and use.
Therefore, the information of the IPMP instrument that each content ID uses should be made of each IPMP tool information, and the order of each IPMP tool information is unimportant.
Each IPMP tool information also should be by 2 main portions, and promptly IPMP appliance id and IPMP tool location recognition factor constitute.The IPMP appliance id can carry out the identification of instrument with clear and definite method, and can define in terminal or carry out preservation in advance or download in the terminal.The information table that expression one example makes in table 1 is expressed to sequence available IPMP appliance id.
The available IPMP appliance id of table 1
In addition, 3 of the front classification that can be used for representing encrypting with the IPMP instrument of eletric watermark etc.The IPMP implementation name is the title of using in order to preserve the IPMP of institute instrument by IPMP tool management function portion, can obtain from the table that is written into.Imformosome is transmitted in the location recognition factor representation, and relative 1 IPMP instrument can have the location recognition factor more than 1.IPMP tool management function portion uses each recognition factor to obtain instrument.If can clearly discern the head and the tail of the initial location recognition factor of IPMP instrument A, then skip the next location recognition factor.If can not, then next discern the 2nd the location recognition factor.
Example:
Local: the inside of terminal system or periphery.
Outside: the outside of appointed terminal system (http:, ftp :)
The IPMP tool identification factor is made of location type and these 2 parts of particular location.Location type is following any one.The corresponding relation of location type and particular location is by following table 2 expression.
The type of table 2 position and particular location
| Location type | Particular location |
| Local | N/A |
| Periphery | N/A |
| Can carry out remote download | Website (http, ftp...) |
| Can not carry out remote download | The remote location of Java servlet etc. |
| Data flow in the content | In this part, comprise IPMP instrument itself |
| ... | ... |
Wherein, for example this locality is that expression is positioned at receiving terminal.Periphery is to be illustrated in certain machine in master network that comprises receiving terminal.Can carry out remote download is that expression can be downloaded deciphering software from the website.Can not carry out remote download is the expression dispersion treatment, for example is that expression is arrived the website of determining to encrypted data passes, is decrypted processing there, returns unscrambling data then.Data flow in the content is that the expression unscrambling data is present in the data flow.
IPMP tool management function
IPMP tool management function should have precedence over system decodes and carry out.This function is carried out syntactic analysis to the IPMP tool information in the initial packet of input content stream data, carries out the necessary operation that is described in detail in these chapters and sections.In Fig. 3, expression is suitable for the situation of the IPMP tool management function of MPEG4-IPMP system.IPMP instrument DB shown in Figure 3 has preserved the database that whole IPMP instruments is obtained the result.
IPMP tool management function is carried out following 4 kinds of actions.
Step 1: the IPMP tool information in the original date bag that is present in content stream data is carried out syntactic analysis.
Step 2: obtain IPMP instrument by the specified necessity of IPMP tool information.
Step 3: be kept among the IPMP instrument DB that the IPMP system carries out reference afterwards obtaining the result.
Step 4: make the input packet only excessively to Demux (decoder) layer.(permeability ground)
IPMP tool management function finds out the IPMP tool information bag sign as unique packet header immediately in the full content data flow after receiving content stream data, find out initial content stream data.Under the situation of the sign that does not find IPMP tool information bag, skip to step 4, make whole data only excessively to the DeMux layer, not under the situation about not finding, execution in step 2.
In the 2nd step, the IPMP tool management function reference position type identification factor and particular location recognition factor carry out obtaining of each IPMP instrument.Under the situation with a plurality of location recognition factors that are associated with 1 IPMP instrument, at first use location recognition factor 1 is obtained the IPMP instrument, when initial obtaining failed, re-uses the location recognition factor 2 and obtains.When achieving success at every turn, must will obtain the result and be kept among the IPMP instrument DB that (step 3) after whole IPMP instruments is obtained in good condition by head and the tail, turns back to step 2.
In position recognition factor type is under the situation of " this locality ", and IPMP tool management function portion is retrieved in current terminal according to appointed IPMP implementation name or IPMP appliance id, if retrieve, then the result is saved among the IPMP instrument DB.In position recognition factor type is under the situation of " peripheral machine ", and IPMP tool management function portion is retrieved whole peripheral machines according to appointed IPMP implementation name or IPMP appliance id, if retrieve, then the result is saved among the IPMP instrument DB.In position recognition factor type is under the situation of " can carry out remote download ", IPMP tool management function is connected to the remote address of appointment, IPMP implementation name or IPMP appliance id according to appointment are downloaded the IPMP instrument, if download successfully, then the result are kept among the IPMP instrument DB.
For under the situation of " can not carry out remote download ", IPMP tool management function only is kept at remote address among the IPMP instrument DB in position recognition factor type.In position recognition factor type is under the situation of " inner content data flow ", and IPMP tool management function is preserved binary data stream (for example, preserving hereof), and the imformosome distributing IP MP implementation name to being saved.In step 3, the result who obtains is stored among the IPMP instrument DB.In IPMP instrument DB, there are 4 imformosomes, represent the example with table 3.
4 imformosomes of table 3IPMP instrument DB
| Content ID | The IPMP appliance id | The IPMP implementation name | The IPMP tool location |
| 0000000011000100 | 00101001 | DESDecrypt.dll | C：￥ipmptools￥DesDecrypt.dll |
| 0000000011000100 | 00100110 | Hard key | LPT1 |
| 0000000011000100 | 00100010 | JAVA servlet1 | 10.2.3.1/servlet1 |
IPMP system (group) needs to generate under the situation of definite IPMP instrument afterwards, with reference to this IPMP instrument DB, and tool using ID, implementation name or current content ID, the position (being necessary) of searching definite IPMP instrument.This structure that comprises IPMP tool management function and IPMP instrument DB, describes the IPMP tool management function situation that is useful in the MPEG2-IPMP system below with reference to as Fig. 4 applicable to mpeg system arbitrarily.In Fig. 4, corresponding by the part that dotted line surrounded with the part among Fig. 3 by dotted line, carried out simple diagram.
The output of necessity of authentification of user
Though can't release the standardization of user authen method, be necessary to constitute the standardization of authentication result.By rights utilize protected content for open, authentication result must be passed through the MPEG-nIPMP system.Therefore, proposed the reply authentication result and set benchmark, as shown in Figure 8, must constitute by 3 fields at least.
Whether legitimacy (legitimacy) expression user (terminal) is regular user, and its result represents with truth or falsity.Utilize rule should comprise the specifying information of access to content power (for example being only to permit repeatedly regeneration of 1 regeneration or permission) about the user.Below licence is described.Content is disturbed, and as shown in the IPMP data, confusing the technology that key is sent to (for example, the IPMP ES of MPEG4-IPMP) in the content stream data is known technology.In order to improve fail safe, by further encrypting the fail safe that can realize bilayer to confusing key.For understand that the content that is disturbed uses confuse key and the 2nd layer key using calls " licence "." licence " is in order to utilize the lowest term of protected content.Licence should be obtained from license server by the passage of safety in the middle of the non-standard users authentication processing carrying out.
This motion of double-deck safety is based in the La Baule meeting the former M6473 motion that " about the motion of the renewal possibility of IPMP system " proposed, wherein, in order to improve fail safe,, further imported 1 signals layer on the top of this double-layer structural for authentification of user.No matter the IPMP terminal is used the user authen method of any kind of, and above-mentioned authentication result must be determined during authentification of user and notify.As shown in Figure 5, with the user authentication module of MPEG-4IPMP system interoperation after having carried out authentification of user, the requirement of issuing licence to the user is proposed to content agent.As shown in Figure 6, can realize being applicable to MPEG-nIPMP by the solution that constitutes with pair of lamina safety.
In Fig. 5, understanding software is to be obtained by IPMP instrument obtaining section 302 by the Internet, and after in temporarily being kept at the portion of preservation as a result 303, is recorded in the IPMP tool database 321.Understand software and can not be directly used in execution, the deciphering key must be arranged in order to open deciphering software.This deciphering key that is used to open deciphering software is detected from content stream data by IPMP tool information syntactic analysis portion 301 under the state of encrypting.Encrypted deciphering key is sent in the IPMP system 324 by decoder 304, IPMP decoding buffer 310.On the other hand, license key is sent here from license server 501 by the Internet.License key is sent to IPMP system 324 after non-standard users authentication department 502 finishes authentification of user.In IPMP system 324, be provided with IPMP decoder module 503.IPMP decoder module 503 occupancy permit keys are understood the deciphering key of encrypting, and generate the deciphering key.Use this deciphering key can carry out above-mentioned deciphering software.
The characteristic that the IPMP system can realize
Because application program, terminal or provider's difference is also different to the requirement of IPMP system, so be difficult to it all unified with 1 standard.This problem be basically since the IPMP instrument packed into or can be downloaded due to.About the actual installation of hardware, though main frame generally can be downloaded definite instrument, most instrument is still pre-installed, or is embedded in inside.About moving or portable terminal device,, also need to finish the IPMP instrument of coding in order to simplify installation.The PC application program has extraordinary compatibility, so can use the instrument that can download or finish coding.
As shown in table 4, as long as can specify compatible is 3 kinds of summaries of the terminal of representative for these 3 kinds with complexity low portable shape terminal, complexity high host terminal and the good PC terminal of flexibility, then in the terminal of IPMP system arbitrarily was installed, the IPMP instrument all can obtain optimal utilization.
3 kinds of summaries that table 4 different terminals is used
In terminal, finished under the situation of coding when instrument, can in terminal, install, must define as the standard of IPMP instrument and the kind of recommending/fixing in order to make the producer.In the present invention, import the sharp point that such project has the following stated.That is, the definition clear-cut face of land of IPMP tool information shows and should be kept at the information of preserving to the IPMP instrument relevant information of location recognition factor etc. where, how.
By importing IPMP tool management function and IPMP tool information, solved in the process of using content, obtain at needs under the situation of new IPMP instrument, the problem of uncertain delay takes place.As Fig. 3 and shown in Figure 5, current or being carried out decoding at all necessary various IPMP instruments of content stream data is obtained and correctly preserved before handling.And, handle by carrying out these, can systematically and carry out the installation of IPMP simply.By importing IPMP tool management function and IPMP tool information, can also satisfy the requirement of IPMP, but also can realize being applicable to the function of MPEG-n as illustrated in fig. 4.
Even be used for the original off-gauge method of the method for authentification of user, also can carry out clear and definite definition in the present invention to authentication result.And in order to improve the solution that fail safe has also proposed 2 layers of safeguard protection that IPMP uses.As shown in Figure 6, the solution that is proposed is applicable in the MPEG-nIPMP system.And, can carry out clear and definite classification, thereby can be sure of to have paved road for the expansion standardization of IPMP to the IPMP terminal by defining 3 specific characters that 3 kinds of possible terminal types are used.
Claims (13)
1. method of in terminal, reading content, described terminal is characterized in that from the dispensing that the supplier accepts content and comprises the data flow of intellectual property right management protection tool information sign, content ID and intellectual property right management protection tool information, comprising:
Data are flow to the step that the lang method is analyzed;
Detect the step of intellectual property right management protection tool information sign, content ID and intellectual property right management protection tool information;
Read the step of the information of the information of the detected intellectual property right management protection intellectual property right management that tool information comprised protection appliance id, the information of location type ID and the position that instrument is protected in intellectual property right management;
According to the information of intellectual property right management protection appliance id, determine the step of code reading instrument that the password that is adopted in the content is understood;
According to the information of location type ID, detect the step of the type of the position that described code reading instrument exists; With
According to the information of the position of intellectual property right management protection instrument, specifically determine the step of the position that described code reading instrument exists.
2. method according to claim 1 is characterized in that: described intellectual property right management protection appliance id is a code reading instrument of understanding the password that is adopted in the content.
3. method according to claim 2 is characterized in that, described code reading instrument is according to the difference of content and difference.
4. method according to claim 2 is characterized in that, described code reading instrument is encrypted by encryption key.
5. method according to claim 4 is characterized in that, the deciphering key that is used to understand described encryption key is further encrypted by license key.
6. method according to claim 1 is characterized in that, determines that the step of described code reading instrument is utilized information table, and this information table comprises: the information of a plurality of intellectual property right management protection appliance ids; With the information of determining corresponding to the code reading instrument of each intellectual property right management protection appliance id.
7. method according to claim 6 is characterized in that, described information table is preserved by the equipment of supplier's side and the equipment both sides of end side.
8. method according to claim 1 is characterized in that, described code reading instrument is preserved after being encoded in advance by terminal.
9. method according to claim 1 is characterized in that, downloads the back and obtains described code reading instrument.
10. method according to claim 1 is characterized in that, also is included in to embed under the situation that electronic watermark information is arranged in the described content after reading content to read the step that is embedded in the electronic watermark information in the described content.
11. method according to claim 10 is characterized in that, described intellectual property right management protection tool information is the instrument that is used to understand electronic watermark information.
12. method according to claim 1 is characterized in that, the interface that is used for the communication of described intellectual property right management protection instrument is complementary with the interface that is required in terminal.
13. a device of reading content in terminal, this terminal is accepted content and is comprised the data flow that tool information is protected in intellectual property right management protection tool information sign, content ID and intellectual property right management from the supplier, it is characterized in that,
This device comprises:
Data are flow to the device (300) that the lang method is analyzed;
Detect the device (301,202) of intellectual property right management protection tool information sign, content ID and intellectual property right management protection tool information; With
Read device (301,213,214,215) according to the information of the information of the detected intellectual property right management protection intellectual property right management that tool information comprised protection appliance id, the information of location type ID and the position that instrument is protected in intellectual property right management;
According to the information of intellectual property right management protection appliance id, determine the device (301,205,206) of code reading instrument that the password that is adopted in the content is understood;
According to the information of location type ID, detect the device (301,219) of the type of the position that described code reading instrument exists; With
According to the information of the position of intellectual property right management protection instrument, specifically determine the device (302,220) of the position that described code reading instrument exists.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP200158236 | 2001-03-02 | ||
| JP2001058236 | 2001-03-02 | ||
| JP2001381406 | 2001-12-14 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB028005074A Division CN1287595C (en) | 2001-03-02 | 2002-02-26 | Content distribution/protecing method and apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN1946175A CN1946175A (en) | 2007-04-11 |
| CN100556135C true CN100556135C (en) | 2009-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006101321077A Expired - Fee Related CN100556135C (en) | 2001-03-02 | 2002-02-26 | The transmission of content and the method for protection and device |
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| Country | Link |
|---|---|
| CN (1) | CN100556135C (en) |
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| Publication number | Publication date |
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| CN1946175A (en) | 2007-04-11 |
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