WO2016010767A1 - Système et procédé d'accès à un contenu sécurisé amélioré - Google Patents

Système et procédé d'accès à un contenu sécurisé amélioré Download PDF

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Publication number
WO2016010767A1
WO2016010767A1 PCT/US2015/039295 US2015039295W WO2016010767A1 WO 2016010767 A1 WO2016010767 A1 WO 2016010767A1 US 2015039295 W US2015039295 W US 2015039295W WO 2016010767 A1 WO2016010767 A1 WO 2016010767A1
Authority
WO
WIPO (PCT)
Prior art keywords
content
playback device
playback
decryption key
medium
Prior art date
Application number
PCT/US2015/039295
Other languages
English (en)
Inventor
Lee Douglas Shartzer
William Gibbens Redmann
Original Assignee
Thomson Licensing
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thomson Licensing filed Critical Thomson Licensing
Publication of WO2016010767A1 publication Critical patent/WO2016010767A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
    • H04N21/835—Generation of protective data, e.g. certificates
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
    • H04N21/26613—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel for generating or managing keys in general
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
    • H04N21/4627—Rights management associated to the content

Definitions

  • This invention relates to a technique for managing secure access to content.
  • OTT over-the-top
  • Some OTT services such as Apple TV and Roku, for example, make use of dedicated set-top boxes for connecting to a display device.
  • OTT systems remain constrained by the limited bandwidth of the Internet service in a typical household. Further, such OTT system must not only share bandwidth with other devices in a given household, but more broadly, they must also share the bandwidth capabilities of the Internet Service Provider (ISP) with other ISP subscribers. Thus, even if the available bandwidth appears adequate at the outset, ISPs can throttle back bandwidth unexpectedly, leaving the quality of the presentation to vary dramatically.
  • ISP Internet Service Provider
  • Other mechanisms for delivering digital content to the home include physical media, such as DVDs and Blu-Ray discs.
  • Such physical media have the advantage of offering a predetermined bandwidth that typically remains essentially constant throughout the course of playback.
  • packaged media remains unsecured with respect use by a particular end user or playback on a particular piece of equipment.
  • different individuals can watch the same DVD or Blu-Ray disc on the same or different equipment without restriction.
  • the owner of the disc can lend it to others who can playback the disc play without issue on their equipment.
  • Some services allow download of digital content in advance of playout, rather than streaming as with the OTT services described.
  • Examples of services that download content in advance include iTunes and Ultraviolet.
  • Services that offer content delivery in advance typically provide an authorization code that allows the end user to obtain the necessary license/decryption key to playback content. Alternatively, such services can provide the license as a component of the purchase. Since these systems download or stream content before playout, they suffer from the bandwidth limitation of the Internet connection.
  • a physical DVD or Blu-Ray disc can include a digital copy of a movie for downloading and playback on devices other than a disc player, e.g., a smartphone, tablet, or personal computer, for example.
  • Digital CopyTM by Warner Bros. Entertainment, Inc. offers this feature.
  • Other services like Ultraviolet, provide an authorization code to the end user for acquiring a license to download such content.
  • the disc itself will have an embedded authorization code, allowing the playback device to acquire a license without the need for the end user to enter any data.
  • the authorization code whether printed on paper or embedded on the disc, typically has a limited number of uses (e.g., one or two), after which the copy becomes unusable by other users (e.g., your friends) and so no support exists for them to obtain a license for their personal use of the content.
  • a method for content playback includes the step of electronically receiving, at a playback device, a decryption key for decrypting encrypted content stored on a non-transitory, tangible, machine-readable medium for playback by playback device.
  • the decryption key is linked to an order entered in response to input from an end user for physical delivery of the encrypted content stored on the medium, thus allowing playback to occur after the physical delivery of the medium.
  • a method for managing content commences by receiving an order for physical delivery of encrypted content on a tangible, machine-readable medium. Thereafter, a decryption key is electronically delivered to a first playback device linked to the order for decrypting the encrypted content so that the first playback device can play the encrypted content after the physical delivery of the medium.
  • FIG. 1 illustrates a block diagram of a typical prior art system for secure digital media delivery
  • FIG. 2 illustrates a block diagram of an exemplary embodiment of a system for shipping media to a user's premise in accordance with an aspect of the present principles
  • FIG. 3 illustrates a block diagram of an exemplary embodiment of a system that produces physical media at a vending machine available to the end user in accordance with another aspect of the present principles
  • FIG. 4 illustrates a flowchart of an exemplary process for providing access to secure content recorded on physical media in accordance with the present principles
  • FIG. 5 illustrates a flowchart for another exemplary process for providing access to secured content on physical media in accordance with the present principles.
  • FIG. 6 illustrates an exemplary end user interface at different stages of the exemplary process of FIG. 4.
  • FIG. 1 illustrates a prior art secure content access system 100 that provides encrypted content to an end user for display.
  • the system 100 comprises an encoder module 101 for providing secure content, as exemplified by secure content 102, and for providing a decryption key (not shown) for such content, the key being stored in a database 103 that also stores account information.
  • An end user typically at his or her premise, has a digital media module 121 for accessing the content 102 and a display 123 linked to the digital media module 121 for displaying the content.
  • the display 123 could comprise a big screen monitor, for example in the user's den, in which case the digital media module 121 could take the form of a satellite- or cable-TV set-top box, or Internet-connected streaming "over-the-top” (OTT) box, connected to the display 123.
  • OTT Internet-connected streaming "over-the-top”
  • Other variations of this configuration could include a DVD or Blu-Ray disc player or the like, having Internet-connected features, in place of or in addition to the digital media module 121.
  • the display 123 could take the form of a "smart" or "connected" television set having an Internet connection, in which case the digital media module 121 would take the form of an application that runs on such a television set, rather than a stand-alone device as depicted in FIG. 1.
  • other devices such as for example, a tablet, smartphone, or personal computer (not shown) could integrate the functionality of both the digital media module 121 and the display 123.
  • the display 123 should offer a both large viewing area and ultrahigh resolution, as well as other capabilities such as high dynamic range and extended color gamut.
  • the digital media module 121 communicates through a network 1 10, typically comprising the Internet, with a content server 104 capable of accessing the secure content 102. Through its interactions with content server 104, the digital media module 121 can present to the end user an inventory of available content, as exemplified in FIG. 1 by the secure content 102.
  • the content server 104 can make use of filtering, recommendation engines, categories, hierarchies, search tools, parental controls, and the like, to present the end user with a subset of all available secure content 102. The end user can select the desired secure content 102 content from the presented inventory.
  • the digital media module 121 accepts the end user's selection and interacts with the content server 104 and a license server 105, both interconnected with the database 103, to obtain the selected secure content from the content server 104 and to obtain a corresponding license from a license server 105.
  • end users can obtain licenses if such end users have an account in a database 103, which account generally corresponds to a subscription or on-demand purchasing agreement as between a content provider and the user.
  • an end user can obtain a license without having an account, merely by authorizing payment during the content request transaction.
  • the database 103 will undertake a connection to at least one financial server (not shown) to debit the user's credit card or other payment mechanism, for example PayPal.
  • a license memory 122 in the digital media module 121 will record the license.
  • the license itself could serve as a decryption key needed to decrypt the selected secure content 102.
  • a decryption key could accompany the license now recorded in the license memory 122.
  • the content server 104 allows the digital media module 121 to download or stream the selected secure content 102. With access to the selected secure content 102 and the corresponding license from the license server 105 stored in license memory 122, the digital media module 121 can decrypt the selected content for presentation on the display 123.
  • FIG. 2 illustrates an exemplary embodiment of an improved secure content access system 200 in accordance with an aspect of the present principles.
  • the system 200 includes an encoder module 201 that produces high quality (e.g., high resolution) secure content 202.
  • the encoder module 201 also produces corresponding content decryption keys for storage in a database 203.
  • An end user at his or her premise has a digital media module 221 connected to a display 223.
  • the end user will typically have a predetermined relationship with the digital media module (i.e., the digital media module resides at the end user's home.) However, the end user could make arrangements to designate another digital medial module as associated with that end user.
  • the digital media module 221 communicates with a content server 204 through a network 210, which, at least in part, can comprise the Internet.
  • a content server 204 can comprise the Internet.
  • the end user can select the secure content 202 from the inventory presented by a content server 204, thereby placing an order for secure content 202.
  • the secure content 202 typically has a size too large for streaming in real-time by the content server 204 to the digital media module 221 because the secure content 202 has a minimum bandwidth requirement for p!ayout not achievable by the network connection between the content server 204 and the digital media module 221.
  • the secure content 202 typically has a size too large such that downloading of such content becomes impractical. Given the bandwidth of the network connection between content server 204 and digital media module 221 , such downloading would consume all or most of the user's household network bandwidth for several hours or days).
  • the improved secure content access system 200 further comprises a copy server 206, which can duplicate the secure content 202 onto a non-transitory, machine-readable tangible media capable of physical delivery, thereby creating a secure content distribution package 207.
  • the secure content distribution package 207 will typically take the form of an optical disc, e.g., a DVD or Blu-ray disc, but could take other forms, such as a memory stick (e.g., "thumb drive") or a memory card (e.g., an SD card).
  • the content server 204 accepts the selection of the secure content 202 from the user.
  • the content server 204 directs the copy server 206 to replicate the secure content 202.
  • the copy server 206 will produce a secure content distribution package 207 containing the secure content 202, as replicated in a tangible, machine readable form, which then undergoes packing in a shipping container (not shown) during a shipping operation 21 1.
  • the system 200 then initiates delivery of the secure content distribution package 207 by arranging for a delivery service 212, e.g., the US Postal Service or a package delivery carrier like Federal Express, to pick up and deliver to the secure content distribution package, now identified by reference number 224.
  • a delivery service 212 e.g., the US Postal Service or a package delivery carrier like Federal Express
  • the digital media module 221 After delivery by service 212 to the end user, the digital media module 221 accepts the secure content distribution package 224 from the end user and the digital media module 221 will communicate such acceptance to the content server 204 and the license server 205, thereby obtaining access to the secure content 202 contained in the package 224.
  • a license server 205 will deliver a license corresponding to secure content 202 to the digital media module 221.
  • the digital media module 221 stores a copy of the license in a license memory 222.
  • the license itself will decrypt the secured content 202. In other instances, a decryption key will accompany the license. Delivery of the license need not occur contemporaneously with the content order.
  • delivery of the license can occur after placing the order, either before or when the digital media module 221 signals acceptance of the secure content distribution package 224.
  • the digital media module 221 can obtain a license upon accepting the secure content 224, which license then undergoes storage in the license memory 222.
  • the storage of the license in the license memory 222 will occur on the basis of original content order for the same digital media module 221. If same end user associated with a given digital media module 221 logs in again, the license memory 222 for that digital media module may need to either update the current license or obtain a new license depending on terms of the original license.
  • the license memory 222 associated with that device will typically download a new license.
  • the module can decrypt the secure content and provide the decrypted content to the display 223 for the enjoyment of the user. In this way, the digital media module 221 can provide content of a greater resolution and higher quality than content streamed or downloaded by the module.
  • the digital multimedia module 221 can offer the end user the convenience of obtaining the appropriate license automatically on the basis of the original content selection.
  • the digital multimedia module 221 can offer the end user a similar convenience by obtaining a license automatically upon accepting the secure content distribution package 224, though in some instances, the module can request the end user approve the transaction.
  • F1G. 3 illustrates another exemplary embodiment 300 of an improved secure content access system of the present principles for providing an end user with high quality, high resolution content on a non-transitory, tangible, machine readable media.
  • the system 300 of FIG. 3 includes an encoder module 301 that produces secure content 302.
  • the encoder module 301 will also provide an access key corresponding to the secure content 302 for storage in a database 303.
  • a first end user transacts with content server 304, for example through a first digital media module 321 over network 310 (which may comprise the Internet), to select and order the secure content 302 for replication at a selected vending machine 31 1.
  • the content server 304 will notify the first end user that the selected content vending machine 31 1 has or will have available secure content 307 comprising a copy of the secure content 302.
  • the first end user will then interact with the content vending machine 31 1 to copy the secure content 307 onto a non-transitory, tangible machine-readable storage device 312, provided from an inventory in the content vending machine 31 1 or supplied by the first end user.
  • copying of the secure content 307 onto the portable storage device 312 could occur prior to the interaction between the first end user and the vending machine 31 1 if the machine provides the storage device.
  • the portable storage device 312 becomes filled with content, thus becoming the filled portable storage device 324 that contains the secure content 325, which comprises a copy of the secure content 302.
  • the machine provides the filled portable storage device 324 to the first end user.
  • the content vending machine 31 1 may be stocked with portable storage devices that already contain copies of secure content 302, thus constituting filled portable storage devises 324. Such pre-loaded filled portable storage devices could be may be replicated at remote duplication facility (not shown) and then loaded into to the content vending machine 31 1.
  • the first end user can now load the filled portable storage device 324 into his or her first digital media module 321. Should the filled portable storage device 324 take the form of a memory stick, the first end user accomplishes such loading by plugging the filled portable storage device into an appropriate USB port (not shown) on the first digital media module 321 . After loading, the first digital media module 321 CC6SSCS the filled portable storage device 324 to read the secure content 325. In order to decrypt the secure content 325, the first digital media module 321 will interact with the content server 304 and/or license server 305 to retrieve a license (and any accompanying key) from the database 303 for storage in a license memory 322. This license-retrieval may occur at the time the first end user initially orders the desired secure content.
  • the digital media module 321 can retrieve the necessary license after the first end user has loaded (e.g., attached) the filled portable storage device 324 or the module can retrieve the license as a separate transaction as described hereinafter. After retrieving the license, the first digital media module 321 can decrypt the secure content 325 to present the decrypted content on the display 323.
  • a first end user who has obtained the portable storage device 324 in the manner describe above can provide the device to a second end user (e.g., a friend or family member) who could then load it onto a second digital media module (not shown) similar to the first digital media module 321.
  • a second digital media module (not shown) similar to the first digital media module 321.
  • this second digital media module will attempt to read secure content 325.
  • the second digital media module will likely not have had any transaction history with the content server 304 regarding the particular secure content loaded onto the filled portable storage device.
  • the second digital media module will need to interact with the content and license servers 304 and 305.
  • the license server 305 will download a license for storage in the license memory associated with the second digital media module. This license (and any key accompanying the license) will enable the second digital media server to decrypt and present the content to the second user. Absent any information within the filled portable storage device 324 as to a paid-up license (described below), then the second user's account will incur a charge for the license.
  • the first end user who originally obtained the secure content could have purchased a paid-up license though his or her digital media module 321 or other device, for multiple users which would identify such users to enable identification of their corresponding digital media modules.
  • the filled portable storage device 324 would indicate such a paid-up license when interacting with license server 305 which would provide a license at no cost to second user.
  • the filled portable storage device 324 itself contains no license so the digital media module that loads such a storage device must seek a license to decrypt the content stored thereon. If the second end user has no account, then that end user will need to interact with the content server 304 and/or the license server 305 to obtain the needed license.
  • different license choices could exist at different prices, depending on how often and how long a user seeks to playback the secure content.
  • the content server 304 can communicate with the content vending machine 31 1 to determine a current inventory level, and if necessary, dynamically direct the vending machine to make further copies.
  • the content vending machine 31 1 could maintain a repository of secure content 307 representing a number of movies, and autonomously maintain its own inventory levels by producing new copies onto portable storage devices 312 as it vends existing copies.
  • FIG. 4 illustrates an improved secure content access method 400, which starts with step 401.
  • a first end user having an account with a system, (e.g., one of systems 200 and 300 of FIGS. 2 and 3, respectively, or a combined system having the delivery mechanisms of both), accesses a content server (e.g., one of servers 204 and 304).
  • a content server e.g., one of servers 204 and 304.
  • a first end user places an order for content through a first digital media module (e.g., one of digital media modules 221 and 321 ) for selected secure content (one of selected secure content 202 and 302) for physical delivery to the first user during a physical delivery indication block 410.
  • a first digital media module e.g., one of digital media modules 221 and 321
  • selected secure content one of selected secure content 202 and 302
  • the first digital media module performs various steps described hereinafter to indicate the mode of physical delivery of the secure content to the first user.
  • the content server e.g., one of the content servers 204 and 304. arranges for such delivery.
  • the first digital delivery module performs step 401 , as well as step 402 and the steps associated with the block 410.
  • another device such as a computer, tablet computer, or smartphone (not shown) could perform such steps.
  • the steps performed in the block 410 can vary depending upon the delivery capabilities of the system (e.g., the systems 200 and 300), as well as the first end user's choices and preferences.
  • FIG. 4 presumes that the system supports both the delivery service 212 of FIG. 2 and content vending machine 31 1 of FIG. 3 and that the first end user has no set preferences, which may, for example, identify a preferred (or undesired) delivery mode, or vending station location.
  • the physical delivery indication block 410 begins by determining whether the selected secure content capable of being provided by the vending machine 31 1. Typically, the content server will make that determination. If the vending machine 31 1 of FIG. 3 cannot provide the requested secure content, then during step 417, the content delivery system will arrange for shipping the secure content.
  • the system will prepare the shipment 21 1 and provide that shipment to the shipping service 212.
  • the content delivery system will provide the first end user with details of the shipment during step 418, which concludes the physical delivery indication block 410.
  • the content delivery system determines whether the vending machine 31 1 can provide the selected secure content. In practice, the content delivery system makes this determination in conjunction with the content server (e.g., the content server 304 of FIG. 3) and in some embodiments the determination will involve communicating with the content vending machine 3 1 1. If the content vending machine 31 1 can provide the secure content now. then the content delivery system 31 1 will notify the first end user of the location of the vending machine user during step 413. In some embodiments, this indication also reserves this secure content at the machine 31 1 for the first end user or otherwise marks an inventory item as being reserved, for example, in content server 304.
  • the content delivery system makes this determination in conjunction with the content server (e.g., the content server 304 of FIG. 3) and in some embodiments the determination will involve communicating with the content vending machine 3 1 1. If the content vending machine 31 1 can provide the secure content now. then the content delivery system 31 1 will notify the first end user of the location of the vending machine user during step 413. In some embodiments, this indication also
  • step 412 the content delivery system determines that the content vending machine 31 1 cannot immediately provide the secure content
  • step 415 the vending machine will obtain the secure content for copying.
  • step 416 the content delivery system provides an indication to the first end user regarding when the selected secure content will become available. Processing continues from here to step 413, during which the content delivery system provides the location of the content vending machine 31 1. The first end user will then interact with the vending machine 31 1 in the manner described so the vending machine can provide the selected secure content during step 414, which can include the copying of the secure content 307 to a user-supplied portable storage device 312 to produce the filled portable storage device 324, thereby completing the physical delivery indication block 410.
  • the first end user will load that content into the first digital media module (e.g., one of digital media modules 221 and 321 of FIGS. 2 and 3, respectively) for acceptance.
  • the license server e.g., one of the license servers 205 and 305
  • step 421 can occur any time after step 402.
  • the first digital media module will decrypt the secure content and present the decrypted content for display, after which the process ends during step 423.
  • FIG. 5 illustrates an improved secure content access process 500, which commences upon step 501 at which time an end user has already obtained the secure content.
  • the end user described with respect to the process 500 could comprise the first end user following deliver of the content in the manner described in connection with the physical delivery indication block 410.
  • the end user could comprise a second user who has borrowed the secure content from a friend.
  • the end user could be an individual who has interacted with the content vending machine 3 1 1 of FIG, 3 to obtain a portable storage device 324 with secure content 325, but has not previously interacted with the content server 304 to secure a license (and accompanying decryption key, if needed).
  • step 501 the end user has already obtained the secure content but this user's digital media module has not yet accepted the secure content and arranged for the needed license.
  • step 520 the user's digital media module accepts the secure content. Based on the identity of the secure content, the digital media module interacts with the content server and license server at step 521 to obtain a license comprising the key corresponding to the secure content. Once obtained, the license gets stored in the license memory.
  • the execution of step 521 will involve accessing the account in database (e.g., one of the account databases 203 and 303 of FIGS. 2 and 3 respectively) corresponding to either the end user or the digital media module associated with that end user.
  • the end user's digital media module will designate itself (as well as the end user associated therewith) in connection with the license acquisition. Having thus obtained the necessary key, at step 522 the digital media module can decrypt the secure content and present it on the attached display, e.g., 223, 323.
  • FIG. 6 illustrates two exemplary end user interfaces 600 and 650 for presentation to an end user on a display 623 (corresponding to one of the displays 223 and 323 of FIGS. 2 and 3, respectively).
  • the first interface 600 illustrates secure content selection dialog 601 as potentially employed during the secure content selection step 402 of FIG. 4.
  • the user interface 600 includes a Notice 602 indicating the availability of a high quality version of a movie 603, represented in FIG. 6 as movie poster art, but which might take other forms, e.g., a text description or a movie trailer.
  • the user interface can include a statement 607 indicating the basis for recommending or proposing the particular movie 603.
  • the dialog 601 can include an offer 604, along with a mechanism, in the form of yes/no buttons 605 and 606, respectively, to enable the end user to select or reject the offered movie
  • the second interface 650 illustrates shipping information 651 as might be presented to shipping details generated during step 418 of FIG. 4.
  • the shipping details 652 in this example identifies the shipping service 212 of FIG. 2 transporting the secure content distribution package 224 of FIG. 2 and the expect delivery date.
  • the interface 650 can include information 653 about the corresponding license, whether or not already delivered to digital media module to indicate the beginning of the validity date, number of times playable (not shown), expiration date (not shown), etc.

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)

Abstract

L'invention concerne un procédé de gestion de contenu commençant par l'entrée d'une commande, en réponse à une entrée d'utilisateur final, pour une livraison physique d'un contenu chiffré stocké sur un support concret lisible par machine. Par la suite, en conformité avec la commande, une première clé de déchiffrage est reçue par voie électronique en vue du déchiffrage du contenu chiffré pour une lecture sur un dispositif de lecture lié à la commande, de sorte que le dispositif de lecture puisse lire le contenu chiffré après la livraison physique du support.
PCT/US2015/039295 2014-07-15 2015-07-07 Système et procédé d'accès à un contenu sécurisé amélioré WO2016010767A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201462024613P 2014-07-15 2014-07-15
US62/024,613 2014-07-15
US201462087849P 2014-12-05 2014-12-05
US62/087,849 2014-12-05

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WO2016010767A1 true WO2016010767A1 (fr) 2016-01-21

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050108560A1 (en) * 2003-11-13 2005-05-19 Samsung Electronics Co., Ltd. Method of copying and decrypting encrypted digital data and apparatus therefor
US20060291653A1 (en) * 1999-08-20 2006-12-28 Hirotsugu Kawada Data player, digital contents player, playback system, data embedding apparatus, and embedded data detection apparatus
US20080155700A1 (en) * 2003-01-10 2008-06-26 Motoji Ohmori Contents distribution system
US20120022977A1 (en) * 2011-03-30 2012-01-26 Cram Worldwide, Llc Secure pre-loaded drive management at kiosk

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060291653A1 (en) * 1999-08-20 2006-12-28 Hirotsugu Kawada Data player, digital contents player, playback system, data embedding apparatus, and embedded data detection apparatus
US20080155700A1 (en) * 2003-01-10 2008-06-26 Motoji Ohmori Contents distribution system
US20050108560A1 (en) * 2003-11-13 2005-05-19 Samsung Electronics Co., Ltd. Method of copying and decrypting encrypted digital data and apparatus therefor
US20120022977A1 (en) * 2011-03-30 2012-01-26 Cram Worldwide, Llc Secure pre-loaded drive management at kiosk

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