WO2003083746A1 - Appareil de reproduction de contenu et procede de commande de reproduction de contenu - Google Patents
Appareil de reproduction de contenu et procede de commande de reproduction de contenu Download PDFInfo
- Publication number
- WO2003083746A1 WO2003083746A1 PCT/JP2003/003930 JP0303930W WO03083746A1 WO 2003083746 A1 WO2003083746 A1 WO 2003083746A1 JP 0303930 W JP0303930 W JP 0303930W WO 03083746 A1 WO03083746 A1 WO 03083746A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- content
- license
- reproduction
- playback
- permission information
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 79
- 238000012545 processing Methods 0.000 abstract description 104
- 238000013500 data storage Methods 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 230000033458 reproduction Effects 0.000 description 165
- 238000010586 diagram Methods 0.000 description 39
- 230000006870 function Effects 0.000 description 10
- 230000003068 static effect Effects 0.000 description 8
- 238000012795 verification Methods 0.000 description 6
- 230000002829 reductive effect Effects 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 230000000670 limiting effect Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000013475 authorization Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q30/00—Commerce
- G06Q30/06—Buying, selling or leasing transactions
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/70—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer
- G06F21/86—Secure or tamper-resistant housings
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2221/00—Indexing scheme relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F2221/21—Indexing scheme relating to G06F21/00 and subgroups addressing additional information or applications relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F2221/2153—Using hardware token as a secondary aspect
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/20—Information technology specific aspects, e.g. CAD, simulation, modelling, system security
Definitions
- the present invention relates to a content playback device and a content playback control method.
- Content is data that is digitized data such as text, audio, video, and maps, Google Software, or a combination of these.
- Reproduction of content means, for example, displaying text or video on a display, or outputting sound from speech for audio.
- a license is information for authorizing the reproduction, distribution, and storage of content in order to protect the copyright of the content, and may include a description of usage conditions and a content decryption key.
- the usage condition is information for controlling the reproduction of the content, and is, for example, information such as a restriction on the number of times of reproduction of the content, a restriction on the reproduction period, and a restriction on the total reproduction time.
- the content decryption key is a key for decrypting the content when the content is encrypted and distributed and stored.
- a license including an encrypted content and a content decryption key encrypted with a user unique key is distributed from a server to a terminal, and the license is stored in a storage medium of the terminal.
- the terminal also verifies the content license and updates the license, and decrypts the content decryption key.
- the content was decrypted by performing the conversion process, and the content was reproduced.
- terminals used secure LSI tamper-resistant modules to securely control content usage such as license verification and license renewal.
- the terminal used for content reproduction is often a dedicated terminal for each content distribution system.
- an application that performs processing related to the license of the content verifies and updates the license. Furthermore, the content data is sent to the decoder, where the content is decrypted. For example, if the content data is music data in the AAC format, the content data is decoded using an AAC decoder, and sound is output from a speaker connected to the decoder.
- the license is verified outside the decoder, and the encrypted content data and the content decryption key encrypted with the decoder's public key are passed to the decoder, which holds the content in the decoder.
- the content decryption key is decrypted with the decoder's private key, and the content data is decrypted with the content decryption key and played back.
- the content decryption key encrypted with the decoder's public key By reusing it, so-called licensing application spoofing may be performed.
- the playback must be stopped automatically after the content is played for that time. For this reason, the time required for playback is measured and the license is updated by rewriting the usage conditions.In other words, the value of the time required for playback is subtracted from the total reproducible time described in the usage conditions. Processing needs to be performed. Also, if the number of reproducible times is described as a usage condition and the playback time considered as one playback is described, the license by rewriting the usage condition only when the playback is considered as one playback is considered. , That is, the number of reproducible times described as usage conditions must be reduced by one.
- the license usually depends on the content distribution / playback service, and the decoder is often configured as hardware and the processing contents cannot be rewritten unlike software, so the license is updated inside the decoder. To do this, the decoder itself delivers the content
- the playback time of the content is the time during which the content was actually being played, but even if the time from when the user pressed the "play button” to when the "stop button” was pressed was measured, the decoder could not read the content data. There is a period of time from when the data is read to when playback starts, and even if the data size of the content data sent to the decoder is measured, the data size and the playback time are not always proportional. It is difficult to accurately measure the playback time outside of the device. Disclosure of the invention
- An object of the present invention is to provide a content reproduction device and a content reproduction control method capable of performing secure and expandable use control of content in a general-purpose terminal.
- the content reproduction device includes: an acquisition unit configured to acquire license data describing a use condition of the content; and, if the use condition is not violated, the use permission information including the reproduction instruction into the license data. And a reproducing unit that reproduces the content in accordance with the reproduction command when the validity is recognized by the determining unit.
- a content reproduction control method includes: an obtaining step of obtaining license data describing a usage condition of a content; The method includes a creating step of creating based on the data, a determining step of determining the validity of the use permission information, and a reproducing step of reproducing the content in accordance with the reproducing instruction when the validity is recognized in the determining step.
- FIG. 1 is a block diagram showing a configuration of a content reproduction device according to Embodiment 1 of the present invention. Mouth figure,
- FIG. 2 is a diagram showing a processing procedure in the content reproduction device according to Embodiment 1 of the present invention
- FIG. 3 is a diagram showing a configuration of license data according to the first embodiment of the present invention
- FIG. 4 is a diagram showing a configuration of a use permission certificate according to the first embodiment of the present invention
- FIG. FIG. 6 is a diagram showing the contents of the license data according to the first embodiment
- FIG. 6 is a diagram showing the contents of the use permission information according to the first embodiment of the present invention
- FIG. 7 is a license according to the first embodiment of the present invention.
- FIG. 8 is a diagram showing the contents of the data
- FIG. 8 is a diagram showing the contents of the usage permission information according to the first embodiment of the present invention
- FIG. 9 is a block diagram showing the configuration of the content reproducing device according to the second embodiment of the present invention. Lock diagram,
- FIG. 10 is a diagram showing a processing procedure in the content reproduction device according to Embodiment 2 of the present invention.
- FIG. 11 is a diagram showing the contents of the use permission information according to the second embodiment of the present invention
- FIG. 12 is a diagram showing the contents of the license data according to the second embodiment of the present invention
- FIG. FIG. 14 is a diagram showing contents of use permission information according to Embodiment 2 of the present invention
- FIG. 16 is a diagram showing the contents of license data according to the second embodiment
- FIG. 16 is a diagram showing the contents of use permission information according to the second embodiment of the present invention
- FIG. 17 is a diagram showing the contents of the third embodiment of the present invention.
- FIG. 18 is a diagram showing a data structure of content
- FIG. 18 is a diagram showing a data structure of a fingerprint according to Embodiment 3 of the present invention
- FIG. 19 is a diagram showing a content acquisition processing procedure according to Embodiment 3 of the present invention.
- FIG. 20 is a diagram showing a procedure of a license purchase process according to Embodiment 4 of the present invention.
- FIG. 21 shows a procedure of a content reproduction process according to Embodiment 4 of the present invention.
- FIG. 22 is a diagram showing a procedure of a license purchase process according to Embodiment 5 of the present invention.
- FIG. 23 is a diagram showing a procedure of content playback processing according to Embodiment 5 of the present invention.
- FIG. 24 is a diagram showing a procedure of a license purchase process according to Embodiment 5 of the present invention.
- FIG. 25 is a diagram showing a procedure of content playback processing according to Embodiment 5 of the present invention.
- FIG. 26 is a diagram showing a license purchase processing procedure according to Embodiment 6 of the present invention.
- FIG. 27 is a diagram showing a procedure of a content reproduction process according to Embodiment 6 of the present invention.
- FIG. 28 is a diagram illustrating a procedure of a license upload process according to the seventh embodiment of the present invention.
- FIG. 29 is a diagram illustrating a procedure of a license upload process according to the seventh embodiment of the present invention.
- a secure device having a tamper resistant module (TRM), a license processing application, and a decoder are used in combination.
- the license processing application that has performed mutual authentication with the secure device creates usage permission information signed by the secure device.
- the use permission information signed by the secure device is referred to as a use permission certificate.
- the decoder IZF library determines the validity of the usage permission information and the signature. This can prevent so-called licensing application spoofing You.
- the decoder reproduces the content only when it receives both the content decryption key and the valid use permission information.
- an audio decoder is connected to a speaker. Only one decoder in a single content playback device can issue a playback instruction to one decoder or pass content data to be played back.
- the usage permission information includes data that differs every time, for example, date and time, and the decoder or decoder IZ
- the usage permission information includes information such as "notify the actual playback time" along with the number of playbacks and the playback time. Then, the playback time is notified to the decoder IZF library license processing application, and a playback stop instruction is issued to the decoder.
- the license processing application updates the license data after receiving the notification or instruction from the decoder IZF library. This makes it possible to accurately control content reproduction.
- FIG. 1 is a block diagram showing a configuration of a content reproduction device according to Embodiment 1 of the present invention.
- the content reproduction device stores the license processing application 20 in a memory provided in advance in the content reproduction device.
- the license processing application 20 is executed, for example, as a jaVa library extension.
- the content reproduction device includes a decoder I / F library 30 and an audio decoder 40.
- the decoder IZF library 30 and the audio decoder 40 are configured as hardware.
- the secure device 10 which is a removable storage medium is mounted on the content reproducing apparatus.
- the flash memory 101 has a data storage area 102.
- the data storage area 102 stores the content obtained from the content server and the license of the content.
- T The RM 103 has a signature function 104 such as a WIM function defined in the WAP forum and an important information storage area 105, for example.
- the important information storage area 105 stores important information such as a fingerprint.
- the license transfer unit 201 transfers the encrypted content decryption key and the license data in response to the question between the secure device 10 and the license processing application 20.
- the license data processing unit 202 verifies the fingerprint, updates the license data, creates usage permission information, registers the buinger print in the important information storage area 105, and sends the license data via the license transfer unit 201. Stores updated licenses in data storage area 1 ⁇ 2.
- the signature unit 203 receives the license information from the license data processing unit 202, creates a digest, and signs the license information using the signature function 104 of the secure device 10. Create a license certificate.
- the transmission unit 204 receives the decrypted content decryption key from the license delivery unit 201 and the license certificate from the signature unit 203, and sends the license certificate to the encrypted content decryption key. Attached, it is sent to the receiving section 301 of the decoder I library 30.
- the receiving unit 301 receives the content decryption key and the use permission certificate sent from the transmitting unit 204 of the license processing application 20, and reproduces the decrypted content decrypting key. It is sent to the command part 304 and the license certificate is sent to the judgment part 302.
- the determining unit 302 receives the license certificate for the Irahara IJ, receiving unit 301, determines the validity of the signature, and uses the dynamic information included in the license information to determine the validity of the license information. Make a decision. After the determination, the determination unit 302 stores the dynamic information in the dynamic information storage area 303 and sends the reproduction command included in the usage permission information to the reproduction command unit 304.
- the dynamic information storage area 303 stores the dynamic information up to now.
- the playback command section 304 sends the playback command and the encrypted content decryption key to the audio decoder 40.
- the reproducing section 401 is provided with an important information storage area 4
- the content decryption key is decrypted with the decoder private key stored in 02, and the content is decrypted and reproduced according to the reproduction command.
- the flash memory of the secure device stores the content itself decrypted with the content decryption key.
- the content decryption key is further encrypted with the decoder public key and stored in flash memory along with the license data.
- This license data is data in which usage conditions of the content, such as the number of reproducible times of the content and the reproducible time, are described.
- a license is composed of the encrypted content decryption key and license data. The structure of the license data will be described later.
- the processing procedure performed by the license processing application is as follows. (1) First, the license is read from the flash memory, and the license is obtained.
- the fingerprint is verified for the license data.
- the license is verified and the license data is updated. A specific updating method will be described later.
- usage permission information is created based on the license data. The validity of this usage permission information is determined in the decoder IZF library. The use permission information includes a playback command. The specific method of creating the usage permission information will be described later.
- a fingerprint is created based on the updated license data and registered in the TRM of the secure device.
- the license including the updated license data is stored in the flash memory of the secure device.
- the use permission information is signed using the signature function of the secure device. The usage permission information after the signature becomes a usage permission certificate.
- the signature function of the secure device is realized by the secure device secret key. Also, only the correct license processing application that has performed mutual authentication with the secure device can sign the usage permission information. You. (8) Next, the license is attached to the content decryption key extracted from the license and sent to the decoder I / F library. The above is the processing procedure in the license processing application. The processing of (6) may be performed after the processing of (7) or (8) or the processing of (9) described later.
- the validity of the use permission certificate attached to the content decryption key is determined. That is, the validity of the signature and the validity of the usage permission information are determined, and the use of the content is determined. If the signature is valid and the use permission information is valid, the reproduction of the content is permitted.
- the validity of the signature is determined using the secure device certificate.
- the secure device certificate is obtained together with the content composite key and the use permission certificate in the process of (8) above. In addition to this processing procedure, it may be obtained in advance.
- the validity of the license information is based on the dynamic information included in the license information.
- the audio decoder the content is reproduced according to the reproduction command only when the validity is recognized in the decoder IZF library. That is, in the audio decoder, after the content decryption key is decrypted with the decoder private key, the content is reproduced by decrypting the content itself with the content decryption key.
- the license data forms a license together with the content decryption key encrypted with the decoder public key.
- the license data consists of a license ID, a content ID, content-related information, and a usage rule.
- the Usage Rule consists of Static Properties and VariaDie Properties.
- the content-related information includes a song title and a taste name.
- Usage Rule is the part where the usage conditions of the content are described. Properties includes information that is not updated by the license processing application, such as the playback expiration date, and Variable Properties includes information that is updated each time the content is played, such as the number of plays and the playable time Have been.
- the use permission certificate is use permission information signed by a secure device.
- the usage certificate proves that the license has been verified in the license processing application.
- the usage permission information includes dynamic information, a command such as a playback command, and playback control information. This usage permission information is created mainly based on the Usage Rule of the license data when it does not violate the usage conditions indicated by the license data.
- the dynamic information is information whose value is different every time the use permission information is created. For example, date and time information indicating the date and time when the usage permission information was created, a random number, a serial number, and the like.
- the validity of the usage permission information is determined by comparing the current dynamic information with the current dynamic information to determine whether the content can be used. Specifically, the determination is made as follows.
- the dynamic information is date / time information or a random number, all the dynamic information up to now is stored. If the license information having the same dynamic information is input to the decoder I / F library again, it is regarded as a so-called impersonation of the license processing application, and the validity of the license information is not recognized. Do not play. On the other hand, if 'license information with dynamic information that does not match any of the stored dynamic information is input to the decoder IZF library, the validity of the license information is recognized. To play the content.
- the previous dynamic information (serial number n) is stored. Only when the dynamic information of the use permission information input to the decoder IZF library this time is "n + 1", the validity of the use permission information is recognized and the content is reproduced.
- the route between the previous dynamic information and the current dynamic information The rule may be a decrement "1 1" or a multiple "X 2", and the validity of the use permission information is recognized only when use permission information having dynamic information according to these rules is input. Also, if the rule is set to a value smaller / larger than the previous dynamic information, the validity of the use permission information is recognized only when the current dynamic information is larger than the previous dynamic information.
- a rule with a value larger than the previous dynamic information can be applied to date and time information.
- the date and time of creation of the first use permission information is March 4, 2002
- the date and time of creation of the second use permission information is March 7, 2002
- the third use permission information is Is created on March 9, 2002.
- the license information having the second date and time information is input to the decoder I / F library after the license information having the third date and time information, the date and time information is compared. Since the second date / time information has a smaller value than the second date / time information, the validity of the usage permission information having the second date / time information is not recognized, and the content is not reproduced. In this way, by including dynamic information having a different value for each generation of the usage permission information in the usage permission information, it is possible to prevent unauthorized use of the content decryption key and prevent so-called impersonation of a license processing application. .
- the following three are conceivable for setting "Limit (playback time limit)". That is: (1) The content server sells a license with a set expiration date. (2) The content server sells a license with a set reproducible period, and the terminal sets the reproducible period based on the reproducible period when the license is stored in flash memory. For example, from a content server 3930
- the terminal sets "License data storage date and time + license data" when storing the license in flash memory.
- the reproducible period is set to "Limit (reproduction limit)”.
- the content server sells the license for which the reproducible period is set, and the terminal sets the reproducible period based on the reproducible period when the content is reproduced for the first time. For example, if the license data sent from the content server to the terminal has a reproducible period (for example, 2 weeks), the terminal will set the date and time of the first replay + license data when the content is replayed for the first time. The reproducible period is set to "Limit (reproduction limit)".
- a plurality of license processing applications may exist in the content reproduction device.
- a plurality of separate license processing abris may exist in the same content reproduction apparatus for each content distribution Z reproduction service.
- the important information storage area for storing the decoder private key may not exist in the decoder but in the decoder I library, and the content may be decrypted by the decoder I / F library.
- the license data may be stored in the secure device TRM instead of the secure device flash memory.
- Variable Properties of the Usage Rule of the license data is the information to be updated. This is divided into two parts, the initial value that is not updated and the current value that is updated, so that only the current value is updated. You may.
- the decoder and decoder I library can also handle plain text content for which no corresponding license exists, that is, ordinary non-copyrighted content.
- plain text content data is passed to the decoder I / F library, it can be played without the use permission information.
- the format of the content and license stored in flash memory The format may be stored after converting the format when the content reproduction device acquires them. In other words, the protection method for content and licenses at the time of distribution may be converted to a protection method that specializes in secure devices.
- variable Properties of the license are updated every time the content is played.
- dynamic information is maintained outside the license and the license itself is not updated. May be maintained in association with external dynamic information.
- the content type may be checked before performing the processing on the license, and the processing on the license may be performed only for the content that can be reproduced by the content reproduction processing apparatus. This makes it possible to prevent licenses from being consumed for content that cannot be reproduced.
- content reproduction is permitted only when the validity of the usage permission information created based on the license data describing the usage conditions of the content is recognized. It is possible to prevent eavesdropping of content data and so-called impersonation of license processing applications, and to prevent unauthorized use of content.
- the validity of the use permission information is determined using dynamic information having a different value each time the use permission information is created, the validity of the use permission information can be accurately determined. Since unauthorized reuse of the permission information can be prevented, it is possible to accurately determine whether the content can be used. Further, since the use permission information is signed by the secure device, it is possible to prevent the use permission information from being falsified.
- the content reproduction device includes, in the usage permission information, reproduction control information for performing accurate reproduction control while maintaining the versatility of the content reproduction device.
- the licensing app may Alternatively, a notification command for notifying the progress of playback is included in the usage permission information as control information, and the decoder I library notifies the license processing application of the playback result or progress of the content based on the notification command. Also, the license processing application updates the license data based on the playback result or the notification of the progress of the playback.
- FIG. 9 is a block diagram showing a configuration of a content reproduction device according to Embodiment 2 of the present invention.
- the same portions as those in Embodiment 1 (FIG. 1) are denoted by the same reference numerals, and description thereof will be omitted.
- the license data processing unit 205 performs verification of a fingerprint and creation of use permission information. Also, after waiting for the notification from the decoder IZF library 30, the license data is updated, the fingerprint is registered in the important information storage area 105, and the data is stored in the data storage area 102 via the license transfer unit 201. Stores the updated license of In other words, after the use permission information is created, the state is in a waiting state until the notification from the decoder IZF library 30 is received.
- the difference from the first embodiment is that the license data processing unit 205 updates the license data based on the notification from the decoder IZF library 30.
- the reproduction control section 305 sends a reproduction command and an encrypted content decryption key to the audio decoder 40 based on the reproduction control information sent from the determination section 302. Also, based on the playback control information, content playback control (measurement of playback time, count of playback times, stop of playback, etc.) is performed, and then notification of playback results indicated by the playback control information and progress of playback are performed. Data for the notification (data indicating the time of reproduction, the number of times of reproduction, the end of reproduction, etc.) is created and sent to the notification unit 303. The notification unit 303 notifies the license data processing unit 205 of the license processing application 20 of the data created by the reproduction control unit 300.
- the reproduction section 400 is provided with an important information storage area 4
- the content decryption key is decrypted with the decoder private key stored in 02, and the content is decrypted and reproduced according to the reproduction command.
- the reproduction of the content is stopped by a stop command from the reproduction control unit 305.
- the license is read from the flash memory, and the license is acquired by the license processing application. (2) Next, fingerprint verification is performed on the license data. (3) Next, the license is verified, and if it does not violate the usage conditions indicated by the license data, usage permission information is created based on the license data.
- the usage permission information includes playback control information for performing playback control that meets the usage conditions of the content.
- the use permission information includes a notification command for notifying the result of the content reproduction and the progress of the reproduction.
- the use permission information is signed using the signature function of the secure device. The use permission information after the signature becomes a use permission certificate.
- the license is attached to the content decryption key extracted from the license and sent to the decoder I library.
- the validity of the use permission certificate attached to the content decryption key is determined. That is, the validity of the signature and the validity of the usage permission information are determined, and the availability of the content is determined. If the signature is valid and the use permission information is valid, reproduction of the content is permitted. (7) When the reproduction of the content is permitted, reproduction control such as the number of times of reproduction, the reproduction time, and the reproduction quality is performed according to the reproduction control information included in the use permission information. (8) Next, the audio decoder plays back the content according to the playback command only when the decoder IF library finds the validity.
- the decoder plays the content according to the playback control from the IZF library.
- the decoder IZF library notifies the license processing application of the content reproduction result and the reproduction progress according to the notification command included in the usage permission information.
- the license data is updated in accordance with the notification.
- a fingerprint is created based on the updated license data, and registered in the TRM of the secure device.
- the license including the updated license data is stored in the flash memory of the secure device.
- the license may be temporarily stored in the flash memory of the secure device after the process (3), and read out again from the flash memory of the secure device before the process (11).
- the decoder I / F library stores the playback control information and the playback progress of the content and the playback result in the nonvolatile memory, and notifies the license processing application of the playback progress and the playback result, and then erases the information in the nonvolatile memory. You may do so. If playback control information, playback progress, and playback results remain in the nonvolatile memory of the decoder IZF library when the content playback device starts up, processing may end unexpectedly before the license data is updated. It indicates that In that case, the processing may be restarted from the processing of the above (9). As a result, even if the processing is interrupted before the license is updated, for example, when the power is turned off, the playback progress and the playback result are retained, and the license can be updated correctly when the processing is restarted .
- the Static Properties of the Usage Rule is "NULL", the Variable Properties describes "Count” (reproducible number of times), and the user continuously plays back.
- the Static Properties of the Usage Rule is "NULL”
- the Variable Properties describes "Count” (reproducible number of times)
- reproduction control based on the number of reproductions is performed. sand
- Use permission information "Notify the number of playbacks to the license processing application” is created.
- the content is played back a plurality of times "C-p1ay” (however, not more than Count).
- the playback result specifically, the playback count "C-play” is notified from the decoder I / F library to the license processing application.
- the license data is updated by reducing the “Count (reproducible number of times)” power S “C—p 1 ay” of the license data shown in FIG. In this manner, continuous playback can be performed a plurality of times.
- Another method of controlling the number of times of reproduction is to create a reproduction command that permits reproduction less than the number of times of reproduction request at the time of creating the use permission information. Until then, the method of repeatedly creating the license information and updating the license data may be used.
- the Variable Properties describes “Count (reproducible number of times)”, and the user gives a continuous playback instruction.
- playback control based on the number of playbacks may be performed as follows. In other words, if "Count ⁇ 1", it does not violate the usage conditions, so the command is "play” and the playback control information is created as usage permission information "Notify the license processing application that playback has finished”. You. The content is reproduced once in accordance with the reproduction command and the reproduction control information included in the use permission information, and the completion of the reproduction is notified to the license processing application from the decoder I ZF library.
- the license processing application receives the notification of the reproduction result, the license data "Count (reproducible number)" is reduced by 1 and the license data is updated. Then, each time the license data is updated, a check is performed to determine whether the license data is "Count ⁇ l". If unt ⁇ 1, the command is "play” and the playback control information is again created as usage permission information "Notify the license processing application that playback has ended.” In this way, it is possible to perform continuous playback a plurality of times, so that the number of playbacks does not need to be managed by the decoder I / F library, thereby reducing the processing load of the decoder IZF library. Note that the number of reproductions (the number of decrements in the usage conditions) may be plural instead of one, and may not be constant every time.
- the number of times of playback in the decoder I / F library is counted once, for example, once when the content is played to the end, once when rewinding during playback, and once even when playback is completed. And count.
- the notification not only the notification to the license processing application but also the content playback device user may be performed. For example, after the end of the reproduction, the number of reproducible times after the update may be displayed on a liquid crystal display or the like. In the same manner, the notification described below may be notified to the user of the content reproduction device.
- the command is "Play” and the playback control information is "Notify the license processing application every time the T-min playback ends even during playback once during playback.”
- Permission information may be created.
- each time “T_min” elapses during the reproduction of the content the fact is notified from the decoder I ZF library to the license processing application as the reproduction progress. At this time, the playback of the content is continuing.
- the “Cout (reproducible number of times)” of the license data shown in FIG. 12 is reduced by 1 and the license data is updated.
- the license processing application is notified to that effect.
- Use permission information may be created and sent to the decoder IZF library in the same way as during playback, and the decoder IZF library may send a stop instruction to the audio decoder to stop playback.
- various information for performing reproduction control can be set in the reproduction control information.
- reproduction quality such as sound quality and image quality.
- the audio decoder reproduces the music content with the sound quality.
- verification of the license by the license processing application and verification of the use permission certificate by the decoder I library are performed. It is difficult to accurately measure and control the actual playback time, playback quality, playback range, etc. with a license processing application. You.
- a decoder IZF library that depends on the license format and the like is required, and as a result, a decoder IZF library that depends on the content distribution / playback service is required. Required. Therefore, measurement and control of the actual playback time, playback quality, playback range, etc. should be performed by the decoder IZF library, and control dependent on other content distribution and playback services should be performed by the license processing application.
- the reproduction control information for performing the reproduction control is included in the use permission information, accurate reproduction control can be performed while maintaining the versatility of the content reproduction apparatus.
- the number of reproducible times when the number of reproducible times is described as the license usage condition, the number of reproducible times can be measured while maintaining the versatility of the content reproducing apparatus, since the number of reproducible times can be measured. Also, if the reproducible time is described as a license usage condition, the accurate reproducible time can be measured, so that the reproducible time can be limited while maintaining the versatility of the content reproducing apparatus. Also, when the reproduction quality is described as the license usage condition, the reproduction quality can be specified, so that the reproduction quality can be limited while maintaining the versatility of the content reproduction apparatus. Furthermore, if the license usage conditions describe, for example, the number of reproducible times and the minimum replay time considered as one replay, the content replay time can be measured, so that the replay is possible while maintaining the versatility of the content replay device. The number of times can be limited.
- the license can be updated by measuring the accurate content replay time and rewriting the reproducible time described in the license use condition. If the license usage conditions include, for example, the number of reproducible times and the minimum replay time considered as one replay, the content replay time is measured, and the reproducible times described in the license use conditions are thereby measured. book 03 03930
- a data structure of a content a data structure of a fingerprint, and a method of acquiring a content from a content server will be described.
- the data structure of the content is as shown in Figure 17. That is, it is composed of a content ID, content-related information, a license ID, a license acquisition URL, and a content body encrypted with a content decryption key.
- the content-related information is information related to the content such as a music piece name or an artist name.
- the license ID is the ID of the license corresponding to the content, and there may be cases where multiple licenses correspond to the same content. For example, for the same content, a license with unlimited playback times and a trial license with 10 playback times can be prepared and sold at different prices.
- the license acquisition URL is the URL referenced when acquiring (purchasing) a license.
- the content itself is music data, video data, image data, document data, program data, and so on.
- the content itself may contain multiple types of data, such as a song, its jacket image and lyrics data, and each of these may be encrypted with a separate content decryption key.
- the data structure of the fingerprint is as shown in Figure 18. That is, it consists of a license ID and a license digest.
- the license digest is data obtained by hashing the license data.
- the processing procedure for content acquisition is as follows. That is, (1) the content acquisition application of the content playback device Download the content and pass it to the java library extension. (2) The downloaded content is stored in the flash memory of the secure device via the ja Va library extension.
- Either the content acquisition or the license purchase described later may be performed first, and it is only necessary that the two are present during playback.
- the content decryption key is encrypted with the decoder public key and further encrypted with the secure device public key.
- the case where the license to be downloaded is signed by the download server will be described.
- the license purchase process and the content playback process in these cases are as follows.
- FIG. 20 is a diagram showing a procedure of the license purchase processing according to the present embodiment.
- the license purchase application of the content playback device downloads (purchases) the license from the content server, and passes the jaVa library extension license. This license is signed by the download server (signature 1).
- the signature 1 is verified in the jaVa library extension using the TRM signature function of the secure device, and the validity of the signature is determined.
- the fingerprint of the license is stored in TRM.
- TRM re-signs using the secure device secret key (signature 2). In other words, the signature is changed from signature 1 to signature 2.
- the reason for changing the signature is that the license data is updated when the content is reproduced.
- the license after the signature change is stored in the flash memory of the secure device.
- the purchased license is stored in the flash memory of the secure device via the java library extension as described above.
- FIG. 21 is a diagram showing a procedure of the content reproduction process according to the present embodiment.
- the signature 2 is verified using the signature function of the secure device, and the validity of the signature 2 is determined.
- the fingerprint data is verified for the license data.
- the Usage Rule of the license data is verified.
- the Variable Properties of the license data are updated.
- a fingerprint is created based on the updated license data and registered in the TRM of the secure device.
- re-signing is performed using the signature function of the secure device.
- usage permission information is created based on the license data.
- the license information after the signature is a license certificate.
- the content decryption key is decrypted with the secure device secret key. At this stage, the content decryption key is still encrypted with the decoder public key.
- the license including the updated license data is stored in the flash memory of the secure device.
- the license is attached to the content decryption key extracted from the license and sent to the decoder IZF library.
- the validity of the usage certificate attached to the content decryption key is determined.
- the content is reproduced according to the reproduction command only when the validity is recognized by the decoder 1F library. That is, in the audio decoder, after the content decryption key is decrypted with the decoder private key, the content itself is decrypted with the content decryption key to reproduce the content.
- FIG. 22 is a diagram showing a procedure of the license purchase processing according to the present embodiment.
- the license purchase application of the content playback device downloads (purchases) the license from the content server, and passes the license to the TRM of the secure device via the JaVa library extension. This license is signed by the download server (signature 1).
- signature 1 is verified by the TRM of the secure device, and the validity of the signature is determined.
- TRM re-signs using the secure device secret key (signature 2). That is, the signature is changed from signature 1 to signature 2.
- the license after resigning is stored in the flash memory of the secure device via the ja Va library extension.
- FIG. 23 is a diagram showing a procedure of the content reproduction processing according to the present embodiment.
- the license is read from the flash memory to the TRM via the ja Va library extension.
- the TRM verifies the signature 2, and determines the validity of the signature 2.
- the fingerprint is verified for the license data.
- the Usage Rule of the license data is verified.
- the Variable Properties of the license data are updated.
- a fingerprint is created based on the updated license data and registered in TRM.
- the secure device is re-signed.
- the TRM decrypts the content decryption key with the secure device private key, and then encrypts the content decryption key again with the decoder public key.
- the key is changed.
- usage permission information is created based on the license data.
- the use permission information is signed.
- the use permission information after the signature becomes a use permission certificate.
- the license including the updated license data is stored in the flash memory of the secure device via the ja Va library extension.
- the decoder IZF library the validity of the use permission certificate attached to the content decryption key is determined.
- the content is reproduced according to the reproduction command only when the validity is recognized by the decoder IZF library. That is, in the audio decoder, after the content decryption key is decrypted with the decoder private key, the content is reproduced by decrypting the content itself with the content decryption key.
- the license purchase process (5) can be performed as shown in FIG. (5) Store the license after the signature change directly from the TRM to the flash memory in the secure device without going through the jaVa library extension.
- the license processing application can be It is also possible to use it by downloading it from the server.
- the content decryption key is encrypted with the secure device public key and further encrypted with the SIM card unique key
- the license is bound to the SIM card, that is, the user who is the owner of the SIM card, and the content can be reproduced only when the SIM card is attached to the terminal.
- the SIM card is an IC chip used in a GSM (Global System for Mobile Communication) type mobile phone.
- GSM Global System for Mobile Communication
- the mobile phone terminal alone does not operate the phone, and the SIM card must be installed.
- Information such as a mobile phone number and a telephone directory is stored inside the SIM card.
- FIG. 26 is a diagram showing a procedure of a license purchase process according to the present embodiment. Compared to the license purchase procedure shown in Fig. 24, (3) a new process has been added to read the unique key of the SIM card from the SIM card attached to the terminal and encrypt the content decryption key with the SIM card's ukeku key. The only difference is that.
- FIG. 27 is a diagram showing a procedure of content playback processing according to the present embodiment.
- (8) When decrypting with the decoder public key, read out the unique key of the SIM card from the SIM card attached to the terminal and decrypt the content with the unique key of the SIM card. Only the process of decrypting the key, decrypting the content decryption key with the secure device secret key, and then encrypting the content decryption key again with the decoder public key is different.
- the content decryption key is encrypted with both the unique key of the SIM card and the public key of the secure device, so that the content can be reproduced only in the case of the combination of the specific SIM card and the secure device. be able to.
- the content decryption key is encrypted with the decoder public key.
- the content decryption key is bound to the secure device by encrypting the content decryption key with the secure device public key as shown in Figs. 23 and 25, and the content decryption key is bound as shown in Fig. 21.
- By encrypting with the decoder public key and the secure device public key it becomes possible to bind to both the terminal and the secure device, respectively.
- FIG. 28 is a diagram showing a procedure of license upload and redownload processing according to the present embodiment.
- the license is backed up to a server on the network to cope with the failure or loss of the content playback device including the secure device, and the license whose status changes due to playback, such as limiting the number of playbacks. Can also be accommodated. Also, instead of uploading the license from the content reproduction processing device, the server may record the purchase at the time of license purchase and use it as a substitute for the uploaded license.
- secure and scalable content usage control can be performed in a general-purpose terminal.
- the content reproduction device of the present invention creates an acquisition unit that acquires license data describing the usage conditions of the content, and creates usage permission information including a playback instruction based on the license data if the usage conditions are not violated.
- a configuration including a creation means, a judging means for judging the validity of the usage permission information, and a reproducing means for reproducing the content in accordance with the reproducing command when the judging means finds the validity is adopted.
- the reproduction of the content is permitted only when the validity of the usage permission information created based on the license data describing the usage condition of the content is permitted. It can prevent spoofing of processing applications and prevent unauthorized use of content.
- the creation unit includes dynamic information having a different value for each creation of the use permission information in the use permission information, and the determination unit determines the validity of the use permission information based on the dynamic information.
- the validity of the use permission information is determined using dynamic information having a different value each time the use permission information is created, so that the validity of the use permission information can be accurately determined. Since unauthorized re-use of the created use permission information can be prevented, it is possible to accurately determine whether the content can be used.
- the creation unit creates usage permission information further including control information for performing playback control that meets usage conditions, and the playback unit plays back the content in accordance with the playback instruction and the control information. It adopts the configuration to do.
- the use permission information includes control information for performing reproduction control, accurate reproduction control can be performed while maintaining the versatility of the content reproduction device.
- the creation unit includes, as control information, number-of-times information indicating the number of times of reproduction of the content in the use permission information, and the reproduction unit reproduces the content with the number of times equal to or less than the number of times of reproduction.
- the number of reproducible times when the number of reproducible times is described as a license use condition, the number of times that the content can be reproduced can be measured. Therefore, the number of reproducible times can be limited while maintaining the versatility of the content reproducing apparatus.
- the creation unit includes time information indicating a playback time of the content as control information in the use permission information, and the playback unit adopts a configuration in which the content is played back within a time period shorter than the playback time.
- the reproducible time when the reproducible time is described as the license use condition, the accurate content reproducible time can be measured, so that the reproducible time can be limited while maintaining the versatility of the content reproducing apparatus. .
- the creation unit includes quality information indicating the reproduction quality of the content as control information in the use permission information, and the reproduction unit reproduces the content with the reproduction quality.
- the reproduction quality when the reproduction quality is described as the license use condition, the reproduction quality can be specified, so that the reproduction quality can be limited while maintaining the versatility of the content reproduction apparatus.
- the configuration further includes a notifying unit that includes, as control information, a notification instruction for notifying a content reproduction result in the use permission information, and notifies the content reproduction result based on the notification instruction.
- a notifying unit that includes, as control information, a notification instruction for notifying a content reproduction result in the use permission information, and notifies the content reproduction result based on the notification instruction.
- the content replay time can be measured, so that the versatility of the content replay device is maintained. Meanwhile, the number of reproducible times can be limited.
- the content reproducing apparatus employs a configuration further including an updating unit that updates license data based on a notification from the notifying unit.
- the reproducible time is described as a license use condition
- the accurate content replay time is measured, and the reproducible time described in the license use condition is rewritten accordingly.
- License can be renewed.
- the license usage conditions describe, for example, the number of reproducible times and the minimum playback time considered as one playback
- the content playback time is measured, and the reproducibility described in the license usage conditions is thereby measured.
- the license can be updated by rewriting the number of times. Therefore, it is possible to limit the reproducible time and the number of reproducible times while maintaining the versatility of the content reproducing apparatus.
- the content reproducing apparatus further includes a signing unit that signs the use permission information, and the determining unit determines the validity of the signature.
- the use permission information is signed, for example, using a secure device or the like, so that the use permission information can be prevented from being falsified.
- the content playback device has a unique ID (a specific device, A configuration is adopted in which a license bound to a user, storage media, a specific device type, etc.), for example, an encrypted license associated with the unique ID is obtained.
- the use of the license can be limited to a specific device (for example, a terminal that has distributed the license), a specific user (for example, a user who has purchased the license), or a specific type of device.
- the content reproduction device further includes a license output unit that outputs a license to the outside, and employs a configuration in which a license held by the content reproduction device is uploaded and backed up to a server or a PC on a network.
- the content playback device further includes a license synchronization unit that synchronizes with an external license.
- a license synchronization unit that synchronizes with an external license.
- the license management device of the present invention includes: an acquisition unit that acquires license data describing a usage condition of content; and a creation device that creates usage permission information including a playback instruction based on the license data if the usage condition is not violated. Means and transmission means for transmitting the use permission information.
- the content reproducing apparatus of the present invention is a license information which is created on the basis of license data describing a use condition of the content, and includes a reproduction command.
- the reproduction of the content is permitted only when the validity of the usage permission information created based on the license data describing the usage conditions of the content is permitted.
- the method includes a creating step, a determining step of determining validity of the use permission information, and a reproducing step of reproducing the content in accordance with the reproducing instruction when the validity is recognized in the determining step. did.
- reproduction of the content is permitted only when the validity of the usage permission information created based on the license data describing the usage conditions of the content is permitted. It can prevent spoofing of processing applications and prevent unauthorized use of content.
- the license management program includes an acquisition step of acquiring license data describing usage conditions of content, and a creation step of creating usage permission information including a playback instruction based on the license data if the usage conditions are not violated. And a sending step of sending usage permission information.
- the content reproduction program of the present invention includes: an acquisition step of acquiring use permission information including a reproduction instruction, which is use permission information created based on license data describing a use condition of the content; A judging step of judging the validity of the In this case, a reproducing step of reproducing the content according to the reproducing command is provided.
- content reproduction is permitted only when the validity of the usage permission information created based on the license data describing the usage conditions of the content is permitted. It can prevent impersonation of the license processing application and prevent unauthorized use of content.
- the present invention can be applied to a content reproduction device and a radio management device in a content distribution system.
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- Software Systems (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Business, Economics & Management (AREA)
- General Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Accounting & Taxation (AREA)
- Finance (AREA)
- Technology Law (AREA)
- Multimedia (AREA)
- Development Economics (AREA)
- Economics (AREA)
- Marketing (AREA)
- Strategic Management (AREA)
- General Business, Economics & Management (AREA)
- Mathematical Physics (AREA)
- Data Mining & Analysis (AREA)
- Databases & Information Systems (AREA)
- Storage Device Security (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/468,004 US20040102987A1 (en) | 2002-03-29 | 2003-03-28 | Content reproduction apparatus and content reproduction control method |
KR10-2003-7015541A KR20040103743A (ko) | 2002-03-29 | 2003-03-28 | 콘텐츠 재생 장치 및 콘텐츠 재생 제어 방법 |
EP03715571A EP1492040A4 (en) | 2002-03-29 | 2003-03-28 | CONTENT FEEDBACK AND CONTENT TAX PROCEDURE |
JP2003581096A JP4250089B2 (ja) | 2002-03-29 | 2003-03-28 | コンテンツ再生装置およびコンテンツ再生制御方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002-097846 | 2002-03-29 | ||
JP2002097846 | 2002-03-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003083746A1 true WO2003083746A1 (fr) | 2003-10-09 |
Family
ID=28671929
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/003930 WO2003083746A1 (fr) | 2002-03-29 | 2003-03-28 | Appareil de reproduction de contenu et procede de commande de reproduction de contenu |
Country Status (6)
Country | Link |
---|---|
US (1) | US20040102987A1 (ja) |
EP (1) | EP1492040A4 (ja) |
JP (1) | JP4250089B2 (ja) |
KR (1) | KR20040103743A (ja) |
CN (1) | CN1297911C (ja) |
WO (1) | WO2003083746A1 (ja) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006121084A1 (ja) * | 2005-05-11 | 2006-11-16 | Ntt Docomo, Inc. | ディジタル権利管理システム、コンテンツサーバおよび携帯端末 |
WO2007007764A1 (ja) * | 2005-07-14 | 2007-01-18 | Matsushita Electric Industrial Co., Ltd. | ライセンス管理装置及び方法 |
JP2007088614A (ja) * | 2005-09-20 | 2007-04-05 | Mitsubishi Electric Corp | コンテンツ暗号化装置およびコンテンツ復号化装置 |
JP2007510207A (ja) * | 2003-10-29 | 2007-04-19 | ソニー エリクソン モバイル コミュニケーションズ, エービー | ユーザにコンテンツを割り当てる方法 |
JP2007538317A (ja) * | 2004-06-01 | 2007-12-27 | サムスン エレクトロニクス カンパニー リミテッド | 携帯型保存装置とデバイスとの間にデジタル著作権管理を用いたコンテンツ再生方法及び装置、並びにそのための携帯型保存装置 |
JP2009026267A (ja) * | 2007-07-24 | 2009-02-05 | Dainippon Printing Co Ltd | 加入者識別モジュール、加入者識別モジュール用プログラム |
WO2009019842A1 (ja) * | 2007-08-07 | 2009-02-12 | Panasonic Corporation | ネットワークavコンテンツ再生システム、サーバ、プログラムおよび記録媒体 |
JP2010501092A (ja) * | 2006-08-18 | 2010-01-14 | ホアウェイ・テクノロジーズ・カンパニー・リミテッド | ライセンスをバックアップおよび復元するための方法とシステム |
WO2018061700A1 (ja) * | 2016-09-27 | 2018-04-05 | 日本電気株式会社 | モデル提供方法、プログラム、分析処理装置、処理実行方法 |
Families Citing this family (41)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7203965B2 (en) | 2002-12-17 | 2007-04-10 | Sony Corporation | System and method for home network content protection and copy management |
US7934263B2 (en) | 2002-12-17 | 2011-04-26 | Sony Pictures Entertainment Inc. | License management in a media network environment |
US20100017627A1 (en) | 2003-02-07 | 2010-01-21 | Broadon Communications Corp. | Ensuring authenticity in a closed content distribution system |
US7779482B1 (en) | 2003-02-07 | 2010-08-17 | iGware Inc | Delivery of license information using a short messaging system protocol in a closed content distribution system |
US8131649B2 (en) * | 2003-02-07 | 2012-03-06 | Igware, Inc. | Static-or-dynamic and limited-or-unlimited content rights |
US20040267384A1 (en) * | 2003-02-07 | 2004-12-30 | Broadon Communications, Inc. | Integrated console and controller |
TW595195B (en) * | 2003-04-04 | 2004-06-21 | Benq Corp | Network lock method and related apparatus by ciphered network lock and inerasable deciphering key |
US20050022019A1 (en) * | 2003-07-05 | 2005-01-27 | General Instrument Corporation | Enforcement of playback count in secure hardware for presentation of digital productions |
JP4295684B2 (ja) * | 2003-08-28 | 2009-07-15 | パナソニック株式会社 | プログラム製作装置 |
EP1536606A1 (fr) | 2003-11-27 | 2005-06-01 | Nagracard S.A. | Méthode d'authentification d'applications |
US20060089123A1 (en) * | 2004-10-22 | 2006-04-27 | Frank Edward H | Use of information on smartcards for authentication and encryption |
JP4131964B2 (ja) * | 2004-12-10 | 2008-08-13 | 株式会社東芝 | 情報端末装置 |
KR100666941B1 (ko) * | 2005-01-07 | 2007-01-11 | 삼성전자주식회사 | 동일 컨텐츠에 대한 중복 다운로드 관리 방법 |
US20070106616A1 (en) * | 2005-02-07 | 2007-05-10 | Motoji Ohmori | License information management apparatus and license information management method |
JP2007257754A (ja) * | 2006-03-24 | 2007-10-04 | Toshiba Corp | 情報再生装置及び再生方法 |
US20070255659A1 (en) * | 2006-05-01 | 2007-11-01 | Wei Yen | System and method for DRM translation |
US10664575B2 (en) * | 2006-05-02 | 2020-05-26 | Acer Cloud Technology, Inc. | Virtual vault of licensed content |
US8676713B2 (en) * | 2006-05-30 | 2014-03-18 | Dell Products L.P. | Dynamic constraints for content rights |
US7624276B2 (en) * | 2006-10-16 | 2009-11-24 | Broadon Communications Corp. | Secure device authentication system and method |
KR100843079B1 (ko) * | 2006-10-31 | 2008-07-03 | 삼성전자주식회사 | 디지털 저작권 관리 방법 및 장치 |
US7613915B2 (en) * | 2006-11-09 | 2009-11-03 | BroadOn Communications Corp | Method for programming on-chip non-volatile memory in a secure processor, and a device so programmed |
US8200961B2 (en) * | 2006-11-19 | 2012-06-12 | Igware, Inc. | Securing a flash memory block in a secure device system and method |
KR100898326B1 (ko) * | 2007-04-16 | 2009-05-20 | 삼성전자주식회사 | 사용 이력 기반의 drm 컨텐츠 관리 방법 및 이를이용하는 휴대 단말기 |
CN101682439B (zh) | 2007-04-23 | 2012-07-04 | Lg电子株式会社 | 使用内容的方法、共享内容的方法和基于安全级别的设备 |
KR101099192B1 (ko) * | 2007-05-07 | 2011-12-27 | 엘지전자 주식회사 | 보안 통신 방법 및 시스템 |
KR100807739B1 (ko) * | 2007-05-18 | 2008-02-28 | 삼성전자주식회사 | Drm 라이센스 저장 장치, 저장 시스템 및 저장 방법 |
JP4982256B2 (ja) * | 2007-06-04 | 2012-07-25 | 京セラドキュメントソリューションズ株式会社 | 電子機器、アプリケーション認証方法、アプリケーション実行システムおよびアプリケーション実行プログラム |
EP2176828A4 (en) * | 2007-08-10 | 2014-06-18 | Lg Electronics Inc | METHOD FOR THE COMMON USE OF CONTENT |
KR101062182B1 (ko) * | 2008-09-09 | 2011-09-05 | 삼성전자주식회사 | 권한 객체 자동 갱신 방법 및 장치 |
US9237310B2 (en) * | 2008-11-26 | 2016-01-12 | Thomson Licensing | Method and system digital for processing digital content according to a workflow |
FR2945368B1 (fr) * | 2009-05-07 | 2011-06-10 | Gutenbergpresse | Module, systeme et procede de visualisation d'un contenu d'un site internet. |
US20100312810A1 (en) * | 2009-06-09 | 2010-12-09 | Christopher Horton | Secure identification of music files |
WO2011052289A1 (ja) | 2009-10-30 | 2011-05-05 | 日立コンシューマエレクトロニクス株式会社 | コンテンツ受信装置 |
WO2011132333A1 (ja) * | 2010-04-23 | 2011-10-27 | 日立コンシューマエレクトロニクス株式会社 | コンテンツの受信装置、および、コンテンツの配信システム |
US8799411B2 (en) | 2010-05-28 | 2014-08-05 | Arvato Digital Services Canada, Inc. | Method and apparatus for providing enhanced streaming content delivery with multi-archive support using secure download manager and content-indifferent decoding |
US9378516B2 (en) * | 2010-12-17 | 2016-06-28 | Verizon Patent And Licensing Inc. | Content provisioning for user devices |
US8627097B2 (en) | 2012-03-27 | 2014-01-07 | Igt | System and method enabling parallel processing of hash functions using authentication checkpoint hashes |
US10949505B2 (en) * | 2017-06-29 | 2021-03-16 | Citrix Systems, Inc. | Computer system providing virtual computing session license distribution features and related methods |
US10387673B2 (en) | 2017-06-30 | 2019-08-20 | Microsoft Technology Licensing, Llc | Fully managed account level blob data encryption in a distributed storage environment |
US10659225B2 (en) | 2017-06-30 | 2020-05-19 | Microsoft Technology Licensing, Llc | Encrypting existing live unencrypted data using age-based garbage collection |
US10764045B2 (en) * | 2017-06-30 | 2020-09-01 | Microsoft Technology Licensing, Llc | Encrypting object index in a distributed storage environment |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002009763A (ja) * | 2000-06-26 | 2002-01-11 | Sanyo Electric Co Ltd | データ再生装置、それを用いた端末装置、および再生方法 |
JP2002073421A (ja) * | 2000-08-31 | 2002-03-12 | Matsushita Electric Ind Co Ltd | ライセンス発行装置、コンテンツ再生装置、ライセンス発行方法、およびコンテンツ再生方法 |
Family Cites Families (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4017089A (en) * | 1975-07-29 | 1977-04-12 | Akebono Brake Industry Co., Ltd. | Sealing device for hydraulically or pneumatically operated equipment |
JPH08263438A (ja) * | 1994-11-23 | 1996-10-11 | Xerox Corp | ディジタルワークの配給及び使用制御システム並びにディジタルワークへのアクセス制御方法 |
US6658568B1 (en) * | 1995-02-13 | 2003-12-02 | Intertrust Technologies Corporation | Trusted infrastructure support system, methods and techniques for secure electronic commerce transaction and rights management |
US6252964B1 (en) * | 1995-04-03 | 2001-06-26 | Scientific-Atlanta, Inc. | Authorization of services in a conditional access system |
JPH10327147A (ja) * | 1997-05-21 | 1998-12-08 | Hitachi Ltd | 電子認証公証方法およびシステム |
JP4072260B2 (ja) * | 1998-06-29 | 2008-04-09 | キヤノン株式会社 | 情報処理装置、情報処理方法及びコンテンツ配信サーバ並びにその制御方法 |
KR100484209B1 (ko) * | 1998-09-24 | 2005-09-30 | 삼성전자주식회사 | 디지털컨텐트암호화/해독화장치및그방법 |
US7225333B2 (en) * | 1999-03-27 | 2007-05-29 | Microsoft Corporation | Secure processor architecture for use with a digital rights management (DRM) system on a computing device |
US6468160B2 (en) * | 1999-04-08 | 2002-10-22 | Nintendo Of America, Inc. | Security system for video game system with hard disk drive and internet access capability |
EP1051011B1 (en) * | 1999-05-01 | 2005-03-16 | Samsung Electronics Co., Ltd. | System for preventing an illegal copy of digital contents |
EP1076279A1 (en) * | 1999-08-13 | 2001-02-14 | Hewlett-Packard Company | Computer platforms and their methods of operation |
KR100769437B1 (ko) * | 1999-09-01 | 2007-10-22 | 마츠시타 덴끼 산교 가부시키가이샤 | 분배 시스템, 반도체 메모리 카드, 수신장치, 컴퓨터가판독할 수 있는 기록매체 및 수신방법 |
JP3930321B2 (ja) * | 1999-12-06 | 2007-06-13 | 三洋電機株式会社 | データ配信システムおよびそれに使用される記録装置 |
US6970849B1 (en) * | 1999-12-17 | 2005-11-29 | Microsoft Corporation | Inter-server communication using request with encrypted parameter |
US7031943B1 (en) * | 2000-05-10 | 2006-04-18 | Cisco Technology, Inc. | Digital license agreement |
US7017189B1 (en) * | 2000-06-27 | 2006-03-21 | Microsoft Corporation | System and method for activating a rendering device in a multi-level rights-management architecture |
US6789189B2 (en) * | 2000-08-04 | 2004-09-07 | First Data Corporation | Managing account database in ABDS system |
WO2002019169A1 (en) * | 2000-08-28 | 2002-03-07 | Digitalowl.Com, Inc. | System and methods for the production, distribution and flexible usage of electronic content in heterogeneous distributed environments |
US7171558B1 (en) * | 2000-09-22 | 2007-01-30 | International Business Machines Corporation | Transparent digital rights management for extendible content viewers |
US7660902B2 (en) * | 2000-11-20 | 2010-02-09 | Rsa Security, Inc. | Dynamic file access control and management |
US7239708B2 (en) * | 2001-06-27 | 2007-07-03 | Microsoft Corporation | Protecting decrypted compressed content and decrypted decompressed content at a digital rights management client |
US7110982B2 (en) * | 2001-08-27 | 2006-09-19 | Dphi Acquisitions, Inc. | Secure access method and system |
-
2003
- 2003-03-28 KR KR10-2003-7015541A patent/KR20040103743A/ko not_active Application Discontinuation
- 2003-03-28 EP EP03715571A patent/EP1492040A4/en not_active Withdrawn
- 2003-03-28 WO PCT/JP2003/003930 patent/WO2003083746A1/ja active Application Filing
- 2003-03-28 JP JP2003581096A patent/JP4250089B2/ja not_active Expired - Fee Related
- 2003-03-28 US US10/468,004 patent/US20040102987A1/en not_active Abandoned
- 2003-03-28 CN CNB03800349XA patent/CN1297911C/zh not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002009763A (ja) * | 2000-06-26 | 2002-01-11 | Sanyo Electric Co Ltd | データ再生装置、それを用いた端末装置、および再生方法 |
JP2002073421A (ja) * | 2000-08-31 | 2002-03-12 | Matsushita Electric Ind Co Ltd | ライセンス発行装置、コンテンツ再生装置、ライセンス発行方法、およびコンテンツ再生方法 |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007510207A (ja) * | 2003-10-29 | 2007-04-19 | ソニー エリクソン モバイル コミュニケーションズ, エービー | ユーザにコンテンツを割り当てる方法 |
KR101100391B1 (ko) * | 2004-06-01 | 2012-01-02 | 삼성전자주식회사 | 휴대형 저장장치와 디바이스간에 디지털 저작권 관리를이용한 콘텐츠 재생방법 및 장치와, 이를 위한 휴대형저장장치 |
JP2007538317A (ja) * | 2004-06-01 | 2007-12-27 | サムスン エレクトロニクス カンパニー リミテッド | 携帯型保存装置とデバイスとの間にデジタル著作権管理を用いたコンテンツ再生方法及び装置、並びにそのための携帯型保存装置 |
US7984506B2 (en) | 2005-05-11 | 2011-07-19 | Ntt Docomo, Inc. | Digital right management system, content server, and mobile terminal |
WO2006121084A1 (ja) * | 2005-05-11 | 2006-11-16 | Ntt Docomo, Inc. | ディジタル権利管理システム、コンテンツサーバおよび携帯端末 |
JP2006318134A (ja) * | 2005-05-11 | 2006-11-24 | Ntt Docomo Inc | ディジタル権利管理システム、コンテンツサーバおよび携帯端末 |
US7835993B2 (en) | 2005-07-14 | 2010-11-16 | Panasonic Corporation | License management device and method |
WO2007007764A1 (ja) * | 2005-07-14 | 2007-01-18 | Matsushita Electric Industrial Co., Ltd. | ライセンス管理装置及び方法 |
JP4889637B2 (ja) * | 2005-07-14 | 2012-03-07 | パナソニック株式会社 | ライセンス管理装置及び方法 |
JP2007088614A (ja) * | 2005-09-20 | 2007-04-05 | Mitsubishi Electric Corp | コンテンツ暗号化装置およびコンテンツ復号化装置 |
JP2010501092A (ja) * | 2006-08-18 | 2010-01-14 | ホアウェイ・テクノロジーズ・カンパニー・リミテッド | ライセンスをバックアップおよび復元するための方法とシステム |
JP2009026267A (ja) * | 2007-07-24 | 2009-02-05 | Dainippon Printing Co Ltd | 加入者識別モジュール、加入者識別モジュール用プログラム |
WO2009019842A1 (ja) * | 2007-08-07 | 2009-02-12 | Panasonic Corporation | ネットワークavコンテンツ再生システム、サーバ、プログラムおよび記録媒体 |
JP4819161B2 (ja) * | 2007-08-07 | 2011-11-24 | パナソニック株式会社 | ネットワークavコンテンツ再生システム、サーバ、プログラムおよび記録媒体 |
WO2018061700A1 (ja) * | 2016-09-27 | 2018-04-05 | 日本電気株式会社 | モデル提供方法、プログラム、分析処理装置、処理実行方法 |
JPWO2018061700A1 (ja) * | 2016-09-27 | 2019-04-25 | 日本電気株式会社 | モデル提供方法、プログラム、分析処理装置、処理実行方法 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2003083746A1 (ja) | 2005-08-04 |
EP1492040A4 (en) | 2006-05-31 |
CN1297911C (zh) | 2007-01-31 |
KR20040103743A (ko) | 2004-12-09 |
EP1492040A1 (en) | 2004-12-29 |
CN1514982A (zh) | 2004-07-21 |
US20040102987A1 (en) | 2004-05-27 |
JP4250089B2 (ja) | 2009-04-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4250089B2 (ja) | コンテンツ再生装置およびコンテンツ再生制御方法 | |
US6807641B1 (en) | Content provider system | |
US7428307B2 (en) | Data reproduction apparatus capable of safely controlling reproduction time of encrypted content data and data reproduction circuit and data recording apparatus used for the same | |
US7437768B2 (en) | Information processing apparatus and method, and program storage medium | |
US7243242B2 (en) | Data terminal device capable of continuing to download encrypted content data and a license or reproduce encrypted content data with its casing in the form of a shell closed | |
US8126813B2 (en) | Information processing apparatus and method, and data communication system and method | |
US20050076208A1 (en) | Data terminal capable of transferring ciphered content data and license acquired by software | |
WO2002075550A1 (fr) | Enregistreur de donnees restituant des donnees originales autorisees a n'exister qu'en un seul exemplaire | |
US20020032747A1 (en) | System, method, device, and program for distributing data, and data reproduction device | |
JP2007510975A (ja) | デジタル著作権管理システムのためのデジタル著作権管理ユニット | |
US7266691B1 (en) | Contents providing system | |
JP2003022219A (ja) | コンテンツデータを容易に再取得できるデータ端末装置、その端末装置において実行されるプログラム、およびそのプログラムを記録した記録媒体 | |
KR100729836B1 (ko) | 콘텐츠 데이터 관리방법 | |
JP2001051906A (ja) | 情報処理装置および方法、並びにプログラム格納媒体 | |
JP2004046452A (ja) | 情報記録装置及び情報再生装置並びにそのプログラム | |
JP2006127349A (ja) | デジタル著作権管理装置およびプログラム | |
JP2003242043A (ja) | 再生装置およびデータ管理システムにおけるコンテンツ管理方法 | |
JP2003099329A (ja) | 情報処理装置及び情報処理方法 | |
JP4379653B2 (ja) | 情報処理装置および方法、並びにプログラム格納媒体 | |
JP4581219B2 (ja) | コンテンツ提供システム、コンテンツ配信方法、記憶媒体及びデータ処理装置 | |
WO2003073295A1 (fr) | Dispositif hote | |
KR100930396B1 (ko) | 휴대단말기용 멀티미디어 컨텐츠 서비스 방법 | |
EP1158418A1 (en) | System for controlling information on condition of contents use | |
JP2004062353A (ja) | コンテンツ再生装置、再生プログラムおよび再生方法 | |
JP2007305216A (ja) | 認証サーバ、再生装置、記録媒体及び配信サーバ |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 10468004 Country of ref document: US |
|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): CN JP KR US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2003581096 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2003715571 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 03800349X Country of ref document: CN Ref document number: 1020037015541 Country of ref document: KR |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWP | Wipo information: published in national office |
Ref document number: 2003715571 Country of ref document: EP |