CN101375543B - Via server by right objects the apparatus and method from an equipment moving to another equipment - Google Patents

Via server by right objects the apparatus and method from an equipment moving to another equipment Download PDF

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Publication number
CN101375543B
CN101375543B CN200780003696.1A CN200780003696A CN101375543B CN 101375543 B CN101375543 B CN 101375543B CN 200780003696 A CN200780003696 A CN 200780003696A CN 101375543 B CN101375543 B CN 101375543B
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CN
China
Prior art keywords
right objects
server
equipment
request message
moves
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
CN200780003696.1A
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Chinese (zh)
Other versions
CN101375543A (en
Inventor
李承帝
金兑炫
秋渊成
孙圣武
希兰·库玛·凯沙瓦穆斯
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LG Electronics Inc
Original Assignee
LG Electronics Inc
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
Priority claimed from KR1020060081343A external-priority patent/KR100830941B1/en
Application filed by LG Electronics Inc filed Critical LG Electronics Inc
Priority claimed from PCT/KR2007/000449 external-priority patent/WO2007086697A1/en
Publication of CN101375543A publication Critical patent/CN101375543A/en
Application granted granted Critical
Publication of CN101375543B publication Critical patent/CN101375543B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
    • H04L9/321—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving a third party or a trusted authority
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
    • H04L9/0819—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s)
    • H04L9/0822—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s) using key encryption key
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/14—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols using a plurality of keys or algorithms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/30—Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/46—Secure multiparty computation, e.g. millionaire problem
    • H04L2209/466—Electronic auction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/60—Digital content management, e.g. content distribution
    • H04L2209/603—Digital right managament [DRM]

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computing Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)

Abstract

A kind of apparatus and method that forward right objects (RO) via server between equipment, wherein, transmitting apparatus is encoded an own RO who obtains, to be converted to the 2nd RO, and by comprising the RO of the 2nd RO move request message and send to server, thus, server is converted to the 3rd RO by being included in the 2nd RO that RO moves in request message, and the 3rd changed RO is transmitted to receiving equipment, receiving equipment receives the 3rd RO from server thus, to install, wherein, transmitting apparatus was deleted or amendment the one RO in the suitable moment.

Description

Via server by right objects the apparatus and method from an equipment moving to another equipment
Technical field
The present invention relates to the method and apparatus in equipment room transmission (movement) right objects (RO:RightsObject) in digital copyright management (DRM:DigitalRightsManagement), specifically, relate to the method and apparatus that via server, the RO of digital content is sent to another equipment from an equipment.
Background technology
Can be by various available approach (for example, website by from content publishing center (CI:ContentIssuer) is downloaded or for example, is received by mail (, Email) or arbitrary medium from other equipments) obtain digital content. In order to use this digital content, right objects (RO) should be sent by copyright publishing center (RI:RightsIssuer). Technology related to this is called digital copyright management (DRM).
Conventionally, DRM agency is mounted in software or the program in the equipment that uses these contents. Replace CI provider and RO provider, prevent illegal use and the piracy to digital content by DRM agency, and protect the copyright of these CI providers and RO provider.
Two class RO include RO and the stateless RO of state. There is the RO of state to be limited to the restriction such as access times or use duration. Here, used how many authorities when reappearing (broadcastings) accordingly when digital content, must verifying and record, the information recording is called status information. Therefore, conventionally in playing digital content, upgrade this status information.
Summary of the invention
Technical problem
Conventionally,, in order to use specific digital content in DRM system, equipment user should directly have the RO of the content of being issued by RI. Introduce for device access RI to obtain many methods of the RO being sent by this RI.
For example, but the equipment that does not also propose certification transmits all or part of of its RO directly being issued by RI method detailed to another equipment such as (, transmit, mobile).
Technical scheme
Therefore, the object of the present invention is to provide for all or part of of the right objects of particular device (RO) being moved to (transmission) apparatus and method to another equipment via server.
In order to realize object of the present invention, a kind of method that transmits RO via server between equipment is provided, the method comprises the following steps: by transmitting apparatus, the one RO is changed, to generate the 2nd RO; Send RO from described transmitting apparatus to described server and move request message, to ask via described server to described the 2nd RO of receiving equipment transmission (movement); Receive the response message that moves request message for described RO from described server; And delete a described RO or the amendment status information relevant to a described RO.
In another embodiment of the present invention, a kind of method that transmits RO via server between equipment is provided, the method comprises the following steps: receive RO from transmitting apparatus and move request message; Send the response message that moves request message for described RO to described transmitting apparatus; Be converted to the 2nd RO by being included in the RO that described RO moves in request message; And transmit the 2nd RO after conversion to receiving equipment.
In order to realize this object of the present invention, a kind of transmitting apparatus that via server, RO is sent to receiving equipment is provided, this transmitting apparatus comprises: digital copyright management (DRM) agency, it is encoded to the RO that will move to receiving equipment via server, and the RO that has comprised the RO after described coding is moved to request message sends to described server; And communication module, it at least communicates with described server.
In order to realize this object of the present invention, a kind of server that transmits RO between equipment is provided, this server comprises: copyright publishing center (RI), this copyright publishing center receives comprising moving to the RO of the RO of receiving equipment and move request message from transmitting apparatus, send the response message that moves request message for described RO to described transmitting apparatus, change being included in the described RO that described RO moves in request message, and send the RO after described conversion to described receiving equipment; And communication module, it at least communicates with described transmitting apparatus and described receiving equipment.
In order to realize this object of the present invention, a kind of system that transmits RO via server between equipment is provided, this system comprises: transmitting apparatus, its transmission has comprised that the RO of the 2nd RO moves request message, the 2nd RO converts from a RO; Server, it is converted to the 3rd RO by being included in the 2nd RO that described RO moves in request message, and the 3rd RO after conversion is sent to receiving equipment; And receiving equipment, it receives described the 3rd RO from described server, and described the 3rd RO is installed.
In order to realize this object of the present invention, a kind of method that transmits right objects via server between equipment is provided, the method comprises the following steps: sent and comprised that the right objects of right objects identifier moves request message by transmitting apparatus; By the described server inspection right objects corresponding with described right objects identifier; Receive right objects by described transmitting apparatus from described server and move response message; And delete described right objects or amendment with the described right objects relevant status information corresponding to described right objects identifier by described transmitting apparatus.
Described further comprising the steps of in the method that transmits right objects between equipment via server: the right objects that by described server, the right objects after checking is converted to receiving equipment; And send the right objects after described conversion to described receiving equipment by described server.
The step of described conversion right objects is further comprising the steps of: by the PKI of server described in described server by utilizing or the privacy key shared with described transmitting apparatus before, the right objects after described inspection is decoded; Utilize the PKI of described receiving equipment or the privacy key shared with described receiving equipment before, described decoded right objects is encoded.
Brief description of the drawings
Fig. 1 shows according to the embodiment via server structure of the system of mobile right objects between equipment of the present invention;
Fig. 2 show according to of the present invention via server the embodiment from an equipment to the method for another equipment moving right objects;
Fig. 3 shows and describes according to the example text of the mobile-initiated grammer of RO of the present invention;
Fig. 4 shows RO according to the present invention and moves the parameter of request message;
Fig. 5 shows RO according to the present invention and moves the example syntax of request message;
Fig. 6 shows the summary part that is included in RO according to the present invention and moves the redirected identifier spreading parameter in request message;
Fig. 7 shows RO according to the present invention and moves the structure of request message;
Fig. 8 shows and shows that RO according to the present invention moves the example text of the grammer of request message; And
Fig. 9 shows the exemplary XML document that shows to be included in the mobile license in RO.
Detailed description of the invention
The present invention be implemented as make the first equipment via server by all or part of transmission of the RO being obtained by this first equipment or movement (hereinafter, " transmission " and " movement " is as identical meanings) to the second equipment.
In the time sending whole RO of the first equipment to second equipment via server, this first equipment can not re-use this RO, and the second equipment can use the RO to its transmission. On the other hand, in the time sending a part of the RO of the first equipment to second equipment via server, this first equipment can use all the other RO except transmitted part RO, and the second equipment can use the part RO to its transmission.
The RO that is sent to the second equipment from the first equipment via server can be the one equipment right objects and user domain right objects.
For example, if stored the relevant information (, when server is while sending the RI of RO to the first equipment at first) of RO obtaining to the first equipment before server, this first equipment and server can be identified RO each other based on RO identifier. Here, this first equipment sends RO identifier and status information object to server, server uses the PKI of the second equipment or the privacy key (secretkey) shared with the second equipment before thus, the RO corresponding with received RO identifier and status information object encoded, to send subsequently the second equipment to.
The first equipment and the second equipment can belong to same user, or belong to the user who differs from one another.
This server can limit the transmission of the RO not being allowed to. This server is the content supplier that comprises content publishing center (CI) and copyright publishing center (RI).
If the RO transmitting has mobile license, this second equipment can send transmitted RO to another equipment.
This first equipment by comprising the RO of the 2nd RO move request message and send to server, the 2nd RO is that the RO from being obtained by the first equipment itself converts. Server sends the response message that moves request message for this RO to this first equipment. Server is also converted to the 3rd RO by being included in the 2nd RO that RO moves in request message, then sends the 3rd RO after conversion to this second equipment.
In the present invention, described status information comprises the various values of the current state corresponding with RO of instruction respectively. Here, for example,, in the time that RO comprises that any one has state restriction (, interval, number of times, accumulation calendar scheduling), this status information represents the value by DRM proxy management. Status information object encoding is for being sent to status information the example of the status information form of the object of another equipment from an equipment.
Referring now to accompanying drawing, embodiments of the present invention are described.
Fig. 1 shows according to the embodiment via server structure of the system of mobile right objects between equipment of the present invention. As shown in Figure 1, system according to the present invention comprises: the first equipment 10, and its transmission has comprised that the RO of the 2nd RO moves request message, the 2nd RO converts from a RO; Server 40, it moves the 2nd RO in request message and is converted to the 3rd RO and the 3rd RO after conversion is sent to the second equipment 20 being included in this RO; And second equipment 20, it receives the 3rd RO to install from server 40.
In the time receiving this RO and move request message, server 40 sends the response message that moves request message for this RO to this first equipment.
The first equipment 10 has a DRM agency 11, and the second equipment has the 2nd DRM agency 21. Server 40 can be content supplier or RI. Content supplier comprises content publishing center (CI) and copyright publishing center (RI).
The first equipment 10 also comprises at least the communication module communicating with this server, and the second equipment 20 also comprises at least the communication module communicating with this server. This server also comprises at least the communication module communicating with the first equipment 10 and the second equipment 20.
The one RO represents to be distributed to by server 40 RO of the first equipment 10.
The 2nd RO represents all or part of of in the time a RO being moved to (transmission) to the second equipment 20 via server 40 the one RO.
The 2nd RO represents such RO,, this RO is the first equipment 10 by utilizing the private key of the first equipment 10 or with the shared privacy key of server 40, the one RO being decoded (here, the rights encryption key to a RO (REK:RightsEncryptionKey) and MAC key are decoded), with the PKI of server 40 or with the shared privacy key of server 40, a decoded RO encoded to obtain subsequently.
The 2nd RO at least comprises the rights encryption key (REK) of utilizing the PKI of server 40 or encoding (or encryption) with the shared privacy key of server 40. Decoded MAC key in the one RO can be included in the 2nd RO.
The 2nd RO can comprise license, restriction, digital signature value, contents encryption key (CEK:Contentsencryptionkey) and REK, and all these is identical with a RO's.
When a RO is while having the RO of state, the first equipment 10 sends to server 40 by the 2nd RO together with this status information object.
The 2nd RO comprises rights encryption key (REK) and MAC key, utilize the PKI of server 40 to encapsulate (wrap) and coding to REK and MAC key, make server 40 can decode to REK and MAC key (or deciphering), the 2nd RO also comprises the mac value of utilizing decoded MAC key in a RO or newly-generated MAC key and calculate, to allow server 40 checking the 2nd RO.
The 3rd RO represents such RO,, this RO is server 40 by utilizing the private key of server 40 or with the shared privacy key of the first equipment 10, the 2nd RO being decoded, uses subsequently the PKI of the second equipment 20 or with the shared privacy key of the second equipment 20, decoded the 2nd RO encoded and obtained.
Server 40 utilizes the PKI of server 40 or decodes with REK and the MAC key of the shared privacy key of the first equipment 10 to the 2nd RO.
Server 40 utilizes the PKI of the second equipment 20 or the privacy key shared with the second equipment 20, and the REK of the 2nd RO that serviced device 40 is decoded encodes. Subsequently, server 40 amendments are included in movement (or transmission) the number of times limits value in the restriction in the 2nd RO, and utilize in the 2nd RO decoded MAC key or newly-generated MAC key to generate mac value, with objectification (object) the 3rd RO.
If the first equipment 10 has transmitted the 2nd RO and status information object, the 2nd RO is converted to the 3rd RO by server 40, and the 3rd RO is the state that the status information object to the 2nd RO and after transmitting merges.
After a RO whole being converted at the first equipment 10 to the 2nd RO and sending the 2nd RO to server 40 subsequently, when receiving from server 40 while moving the response message of request message for RO, the first equipment 10 is deleted RO.
After a part of a RO being converted at the first equipment 10 to the 2nd RO and subsequently the 2nd RO after conversion being sent to server 40, when receiving from server 40 while moving the response message of request message for RO, the first equipment 10 is revised (renewal) status information relevant with a RO.
In the present invention, the first embodiment and the second embodiment have illustrated respectively via server the whole transmission of carrying out to RO (or mobile etc.) and the transmission a part of RO carried out via server (or mobile etc.).
Below, first according to the first embodiment, the method that via server, RO is sent to another equipment from an equipment is schematically described. The first embodiment shows the whole transmission of carrying out to RO.
The first user of the first equipment 10 (for example utilizes the first equipment 10, a kind of mobile phone or mobile communication terminal) or such as other devices of PC, browse from server 40 (, content supplier, specifically, copyright publishing center (RI) 41) particular content (for example, MP3 music file, video file etc.). Here the RO that, RI generates for particular content can comprise mobile license.
If this particular content is mp3 file, first user wishes to give this mp3 file as present the second user.
In the time that RI41 comprises mobile license for the RO of this mp3 file generation, first user is downloaded mp3 file and RO thereof.
Then, do not used or the RO that used of part whole in order to transmit (movement), this first user access services device 40 also sends the RO of this mp3 file to server 40.
The second equipment 20 (for example, portable MP 3 player) of the second user is connected to the server 40 of the first equipment 10, to download the mp3 file and the RO that are sent to server 40 by first user.
Therefore, this second user can play this mp3 file with the second equipment 20, plays this mp3 file and first user cannot recycle the first equipment 10.
Like this, the first equipment 10 can be given the second equipment 20 by whole transmission (movement) of the own RO obtaining via server 40.
Hereinafter, schematically the method that a part of RO is sent to another equipment from an equipment via server is described second embodiment of the invention. The second embodiment shows the transmission that a part of RO is carried out.
First user utilizes the first equipment 10 to browse the available content (, video) from server 40.
First user is selected concrete video, and indicates him to wish to play this concrete video ten times and share this concrete video.
Server 40 generates the RO of selected video, and this RO has restriction and the mobile license of playing restriction for ten times.
First user utilizes the first equipment 10 to download this video and RO subsequently.
First user utilizes the first equipment 10 to play this video once.
If the second equipment 20 is wished displaying video specific times, first user utilizes the first equipment 10 to visit server 40 and transmits a part of the RO of these videos to server 40.
,, if the second equipment 20 is wished displaying video once, the first equipment sends the RO for once broadcasting from the own RO obtaining whole to server 40.
The second user is via the second equipment 20 access services devices 40, downloads subsequently from the first equipment 10 and sends the video of server 40 and RO (the second user can be same or different user from first user) to here.
Therefore, the second user can carry out displaying video by the RO for once playing based on obtaining via the second equipment 20.
Meanwhile, so the first equipment 10 has the RO of displaying video eight times.
Below, describe the first and second embodiments in detail with reference to Fig. 2.
Fig. 2 show according to first embodiment of the invention via server by right objects the illustrative methods from an equipment moving to another equipment. Signal stream based on shown in Fig. 2 illustrates the first embodiment. Mode with the difference of only paying close attention to the second embodiment and the first embodiment illustrates the second embodiment.
The one DRM agency is arranged in the first equipment 10, and the 2nd DRM agency 21 is arranged in the second equipment 20. RI41 is arranged in server 40. The first user of the first equipment 10 can be same user or different user with the second user of the second equipment 20. In addition, RO to be transmitted can be equipment RO or user domain RO.
For the purpose of explanation, the RO that the first equipment 10 obtains is called a RO, and the RO that send server 40 to from the first equipment 10 is called the 2nd RO, and the RO that will send the second equipment 20 to from server 40 is called the 3rd RO.
RI41 has been distributed to a RO the one DRM agency 11. The one RO can be untapped RO or by the residue RO after partly using.
Below, describe all or part of transmission (movement) of a RO to the 2nd DRM agency's 21 situation to a DRM agency 11.
In the time that hope is sent to RO another DRM and acts on behalf of from DRM agency (, in the time transmitting RO via RI), this RO should have the digital signature being generated by this RI. Therefore, in the time that request mobile (transmission) is changed the 2nd next RO from a RO, digital signature can provide integrity function and the non-property denied (non-repudiation) function for RI41, to allow RI41 to check oneself whether to have sent this RO.
First, a DRM agency 11 first user is browsed RI entrance (portal), and selects RO to move (transmission) Information Mobile Service to another DRM agency. First user is with backward RI41 request service, and this service is for sending an own RO who obtains to the 2nd DRM agency.
RI41 sends rights object acquisition protocol (ROAP:rightsobjectaccessprotoco1) to a DRM agency and triggers (RO moves triggering), starts to transmit RO (S10) to RI41 to indicate.
For example, if a DRM agency 11 has known the identifier of target DRM agency (, the 2nd DRM agency 21), can not perform step S10. The 2nd DRM agency's identifier represents the ID of the second equipment.
In the time receiving user's initiation or ROAP triggering, a DRM agency 11 generates shielded RO (, the 2nd RO), to send RI41 to.
That is, a DRM agency 11 uses the private key of the first equipment or the privacy key shared with RI41 before, and the RO that RI41 is sent (, DRM agency 11 RO that obtain (a, RO)) decodes. Here, the rights encryption key to a RO (REK) and MAC key are decoded.
The one DRM agency 11 generates another shielded RO (, the 2nd RO). This another shielded RO also can comprise contents encryption key (CEK), license, restriction and digital signature; all these be included in contents encryption key (CEK), license in the RO (a, RO) that the first equipment 10 obtains, limit identical with digital signature.
When generating shielded RO when (, the 2nd RO), a DRM agency 11 utilizes the PKI of RI41 or the privacy key shared with RI41 before, REK and MAC key is encoded, to allow RI41 to read REK and MAC key. The one DRM agency 11 also generates the mac value of the integrity verification that will be used for the 2nd RO, to allow the integrality of RI41 checking the 2nd RO.
Suppose that a RO is the RO that has state, if a RO intactly or is partly transmitted, a DRM agency 11 generates status information object (S12) according to managed status information.
Generating shielded RO (; the 2nd RO) afterwards; the one DRM agency 11 generates RO and (for example moves request message; the ROAP-RO request of moving); and this message is sent to RI41 (S14), this RO moves request message and has comprised the RO, status information object (if RO is the RO that has state) and the identifier of the second equipment and the digital signature of this message that generate. The identifier of this second equipment can move not included in request message not included in this RO. First user can be specified the identifier of the second equipment after a while in RI porch. This RO moves request message and represents, for request, RO is transmitted to (movement) message to another DRM agency, is described in detail after a while.
Using the ROAP sending from a DRM agency 11 (for example to ask; the ROAP-RO request of moving) after digital signature in message successfully completed and comprised the certification of recalling (revocation) status checkout; the shielded RO (, the 3rd RO) of RI41 generation and the 2nd DRM agent binding (S16).
; RI41 verifies received RO (, the 2nd RO), and utilizes the private key (or before shared privacy key) of RI41 to decode to received RO; to generate the RO (, the 3rd RO) binding with the second equipment 20.
When generating the 3rd RO (, RO with the 2nd DRM agent binding) time, if receive status information object, RI41 should combine received status information object and restricted information, and should modify to the limits value being included in the 2nd RO receiving from the first equipment (transmitting apparatus) 10.
In addition, if be included in the 2nd received RO<move>element has number of times restriction, RI41 should will have this<move>element<count>the value minimizing 1 of element.
To be included in the 2nd RO that receives<rights>after limits value in element modifies, RI41 generates for<rights>digital signature value of element.
(RI41 uses target device, the second equipment 20) PKI or with the shared privacy key of the second equipment 20, rights encryption key (REK) and MAC key are encoded before, subsequently will coding after and REK and the MAC key of encapsulation append to be arranged in<ro>under element<encKey>element.
RI41 generates<ro>The mac value of element also appends to generated mac value to be positioned at<protectedRO>Under element<mac>Element. In this way, RI41 generates the 2nd DRM agency's 21 RO (, the 3rd RO or with the RO of the 2nd DRM agency 21 bindings).
Subsequently, RI41 moves request message (for example, the ROAP-ro request of moving) in response to RO and RO is moved to response message (for example, ROAP-ro-moves response) sends to DRM agency 11 (S18). RO moves response message and represents whether RI41 confirms that the 2nd transmitted RO will successfully be transmitted. To explain after a while RO and move response message.
In the first embodiment (, for intactly transmitting RO), after identifying and successfully sending RO to RI41, receive the DRM agency 11 that RO moves response message and delete corresponding RO (, the one RO) (S20), and (, for partly transmitting RO) revises the status information relevant with corresponding RO (a, RO) in the second embodiment.
On the other hand, RI41 carries out typical 1 logical (1-pass) or 2 logical (2-pass) RO obtain agreement (S22, S24 and S26). The in the situation that of 2 logical RO, RI41 sends ROAP to the 2nd DRM agency 21 and triggers, to indicate the 2nd DRM agency 21 to download from DRM agency 11 RO that transmitted.
The 2nd DRM agency 21 successfully complete with RI41 carry out obtain protocol procedures after, download the RO that is sent to RI41 by a DRM agency 11 first user. Therefore, the 2nd DRM agency 21 installs the RO (S28) downloading.
By describing in detail, the RO that proposed in the present invention moves triggering, RO moves request message and RO moves response message now.
Below, first illustrate that RO moves triggering.
This RO moves and triggers the ROAP triggering that represents to send to from RI transmitting apparatus in the time that transmitting apparatus wishes, via RI, RO is transmitted to (movement) to receiving equipment. It can be the expansion that DRMROAP triggers that RO moves triggering.
As shown in the step S10 in Fig. 2, RO is moved to triggering and send to a DRM agency 11 from RI41, to indicate a DRM agency 11 to start to transmit RO to RI41.
Fig. 3 shows explanation according to the example text of the mobile-initiated grammer of RO of the present invention. Underscore part in Fig. 3 has specifically illustrated text expansion.
When a DRM agency 11 receives comprised<roapTrigger>ROAP of element (its have<roMove>element) is while triggering, and a DRM agency 11 should obtain the license of first user and start ROAP-RO and move request protocol. If a DRM agency in received RO moves triggering, do not specify<riID>Ri context (Context), a DRM agency 11 should use at RO move in triggering<roapURL>unit usually starts ROAP-device call registration protocol (helloregistrationprotocol).
When first user select wait transmit one or more RO time, RI41 can move in triggering and to specify (multiple)<roID at RO>element.
Move by RO trigger receive specified by RI41<roID>after element, the one DRM agency 11 should comprise RO to be transmitted or roID (identifier of RO) that (interpolation) move in request message (, the ROAP-ro request of moving) at ROAP-RO.
Specify target device, should arrange<roapTrigger of RI41 if wish the first user that sends its RO to another equipment>in element<targetDeviceID>element. Therefore move in the triggering<roapTrigger that, is included in RO>can have<targetDeviceID of element>element.<targetDeviceID>element can comprise the ID value of the equipment (, target device) that RO will be sent to.
Below illustrate that RO moves request message.
RO is moved to request message (that is, ROAP-RO moves request message) and send to RI41 from transmitting apparatus, to start mobility protocol by RI. This message represents, via RI, RO is sent to target DRM agency. With reference to Fig. 2, at step S14, RO is moved to request message and send to RI41 from a DRM agency 11.
Fig. 4 shows RO according to the present invention and moves the parameter of request message. In Fig. 4, M represents essential composition, and o is optional member.
Device id represents requesting service (, transmitting apparatus). RIID represents the ID of server (, RI).
Triggering real data (triggernonce) and the RO receiving from RI41, to move the real data value that triggering comprises identical. When having specified (definition) when triggering real data parameter, RI41 can preserve the ID (, the ID of the second equipment) of the target device that first user specified during browsing. In this case, can move appointment (definition) target device ID parameter in request message at RO.
Equipment real data (devicenonce) represents the selected real data of transmitting apparatus (, the first equipment).
Request time represents the current DRM time that transmitting apparatus identifies.
Trigger if the RO receiving from RI moves have<targetDeviceID>, should intended target device id. Target device ID value should move in triggering with this RO<targetDeviceID>element is identical. If there is no intended target device id parameter, first user should be at RI porch intended target equipment.
(multiple) ROInfo Parametric Representation will move one or more RO of (transmission). It can comprise one or more ROID and status information object pair, or comprises one or more shielded RO and status information object.
The content of shielded RO should with the content of the RO receiving from RI at first except being included in<protectedRO>In element<ro>Element<encKey>Element and being included in<protectedRO>In element<mac>Content beyond element is identical.
<encKey>element have through encapsulation rights encryption key (REK) and MAC key. Should encode to these two keys with the shared privacy key of RI by the PKI of the first equipment utilization RI or before, before this PKI being mutually shared in authentication processing.
<mac>Element comprises<protectedRO>The mac value of element. Should utilize<encKey>MAC key in element or utilize newly-generated MAC key to calculate this mac value, and appended to<mac>In element.
When RO is while having the RO of state, the parameter of (multiple) status information object should be included in RO and move in request message. The Parametric Representation of described (multiple) status information object is acted on behalf of the status information of managing by a DRM of the first equipment.
In the time intactly transmitting (movement) concrete RO, according to generating status information object with the whole corresponding status information of concrete RO. On the contrary, in the time partly transmitting concrete RO, generate status information object according to the status information corresponding with a part of this concrete RO.
If RI context does not represent RI and has preserved its desired device certificate information, moves request message at RO and comprise certificate chain parameter.
Spreading parameter can comprise that being redirected identifier expands. When there is redirected identifier expansion in spreading parameter field time, spreading parameter indicates to receive the ID of the receiving equipment (for example, the second equipment) of shielded RO. ID can be to be the telephone number that each equipment is set by cellular carrier. Do not exist if be redirected identifier expansion, this impliedly represents that to RO the first equipment submits untapped RO (untapped RO is corresponding with shielded RO parameter) to here, to the new RO with equal value or less value. ; be redirected identifier expansion if do not existed in RO moves the spreading parameter field of request message; receiving RI that RO moves request message identifies and is included in the RO (, the RO corresponding with shielded RO field) that RO moves in request message and will be issued by being converted into another RO.
Signature Parametric Representation RO moves the digital signature of request message.
Fig. 5 shows RO according to the present invention and moves the example syntax of request message. In Fig. 5,<roMoveRequest>element definition ROAP-RO move request message, and there is " roap:ROMoveRequest " of complex data type. " roap:ROMoveRequest " Extended-type basic " roap:Requesttype " function.
Fig. 6 shows the summary part that is included in RO according to the present invention and moves the redirected identifier spreading parameter in request message.
Below illustrate that RO moves response message.
Move request message (in response to RO, the ROAP-RO request of moving), RO is moved to response message (, ROAP-RO moves response) and send to transmitting apparatus from RI,, in the step S18 in Fig. 2, send to a DRM agency message from RI41. RO moves response message and represents the RI RO that whether confirms successfully to have transmitted (transmission).
Fig. 7 shows RO according to the present invention and moves the example syntax of request message.
The RO that state (status) Parametric Representation is undertaken by Ri moves the treatment state of request message. If processed successfully, state parameter value is " success ". Otherwise RI selects one to represent wrong status message.
Device id Parametric Representation reception RO moves the ID of the equipment of response message. This parameter has and is included in RO and moves the value that device id parameter value (, the device id parameter value of Fig. 4) in request message is identical.
RIID Parametric Representation transmission RO moves the ID of the RI of response message. RI real data parameter has the selected real data by this RI.
ROURI Parametric Representation for example, for obtaining the address (, HTTPURL) of the RO binding with target device. Equipment can pass to target device by ROURI, to allow this target device to download this RO.
Define spreading parameter for RO moves response message, but here do not used.
Signature Parametric Representation RO moves the digital signature of response message.
Fig. 8 shows and shows that RO according to the present invention moves the example text of the grammer of request message.
<roMoveResponse>element definition ROAP-RO move response message.
<roMoveResponse>element has " roap:ROMoveResponse " complex data type. This complex data type has been expanded " roap:Response " type substantially.
Below, the digital signature being included in the RO being sent by RI is described.
In the time that hope is sent to RO another DRM and acts on behalf of from DRM agency, no matter RO is transmitted via RI or is directly transmitted, and RI sends the RO with digital signature. In the time that the RO request of moving is processed, this digital signature can provide the non-sexual function of denying for RI, to make RI check whether this RO is that himself sends.
With reference to Fig. 2, in the time that the first equipment 10 receives the RO being sent by RI41 and it is installed, if at<rights>define " move (movement) " license in element, DRM agency 11 should preserve<signature of the first equipment 10>element value (here, if RO has comprised mobile license, by RI generation<signature>value of element). The one DRM agency 11 should create and be included in the RO being sent by RI41 at first<rights>element is identical<rights>element.
In addition, a DRM agency 11 should preserve the REK and the MAC key that are included in the RO sending at first.
Fig. 9 shows the exemplary XML document of " movement " license that shows to be included in RO.
Be positioned at<Move element below<type>element can have (multiple) value of " via RI " and/or " directly transmitting ". If<type>value of element is " via RI ", a DRM agency 11 can move RO via RI41. If<type>value of element is " directly transmitting ", a DRM agency 11 can directly move to RO another DRM agency (not considering directly to transmit the detailed description of RO here, in the present invention).
<constraint>under element<count>element representation transmits the number of times of RO.
If<count>value of element is " 0 ", a DRM agency 11 should not send and move request message for the RO of this RO to RI41.
Can in the time that the 2nd DRM agency 21 of the second equipment 20 installs received RO, be applied in equally a DRM agency 11 installs performed processing when the RO transmitting (this RO is the RO being sent by RI41 at first) and operates.
In another embodiment of the present invention, will the method that transmit right objects via server between equipment be described. In another embodiment, transmitting apparatus sends RO identifier instead of RO itself to server, to ask RO to move. That is, this another embodiment and above-mentioned the first and second embodiment differences are, transmitting apparatus sends RO identifier instead of RO to server.
See figures.1.and.2, the situation that the RO of the first equipment 10 is sent to the second equipment 20 via server 40 (, RI41) is described.
If RI41 has preserved the RO of the first equipment 10, the first equipment 10 and RI41 can identify this RO based on RO identifier.
The first equipment 10 moves request message by the RO that has comprised the RO identifier for identifying RO and sends to RI41, to ask RI41 to send its RO to second equipment 20. Here, RO moves (multiple) shielded RO parameter that request message can not comprise the essential composition of conduct shown in Fig. 4, and comprises that RO identifier is as essential composition.
RI41 checks subsequently and is included in received RO and moves the corresponding RO of RO identifier in request message. RI41 utilizes its private key or the privacy key shared with the first equipment 10 before, and the RO after checking is decoded. Then, RI41 utilizes the PKI of the second equipment 20 or the privacy key shared with the second equipment 20 before, and decoded RO is encoded.
In the time that RO is encoded, if decoded RO has mobile number of times restriction, RI41 will transmit number of times minimizing 1. RI41 also utilizes the PKI of the second equipment 20 or the privacy key shared with the second equipment 20 before, and the REK and the MAC key that are included in decoded RO are encoded. RI41, by calculating MAC key or newly-generated MAC key, generates mac value.
If RO is the RO that has state, RI41 can encode to status information object.
Like this, generate to be moved to the RO of the second equipment 20 after or during generation RO, RI41 moves request message in response to RO, and response message (for example, RO moves response message) is sent to the first equipment 10. If this response message represents to guarantee the successful transmission of RO, the first equipment 10 is deleted RO for the situation that has transmitted complete RO, and modifies for the situation pair status information relevant to this RO that has transmitted a part of RO.
RI41 sends Ro and status information object (in the case of the RO that has state) after coding to second equipment 20. The second equipment 20 correspondingly receives this RO, to install.
As described in up to the present, the invention provides all or part of transmission (movement) of RO particular device being obtained via server to method of another equipment, can the RO for certain content being sent by this server be sent to another equipment via server.
According to only describing the present invention as schematic embodiment. Clearly, those skilled in the art can modifications and variations of the present invention are in the situation that not departing from the spirit or scope of the present invention. Therefore, the present invention is intended to contain these modifications and variations of the present invention that fall within the scope of claims and equivalent thereof.

Claims (17)

1. one kind is transmitted the right objects RO being issued by this server between equipment via serverMethod, the method comprises the following steps:
Receive rights object acquisition protocol ROAP by transmitting apparatus from described server and trigger message,
Right objects RO based on issued generates the 2nd RO,
Generate right objects by described transmitting apparatus and move request message;
Send described right objects from described transmitting apparatus to described server and move request message, withRequest transmits described the 2nd RO via described server to receiving equipment, and described right objects moves pleaseAsk message to comprise described the 2nd RO, described the 2nd RO has except being included in<protectedRO>In element<ro>Element<encKey>Element and being included in<protectedRO>In element<mac>content identical with the content of issued RO beyond element;
If wherein described server has kept the RO issuing, described right objects moves requestMessage comprises the identifier of issued RO,
If wherein described the 2nd RO is included in described right objects and moves in request message,The signature of described server is also included within described the 2nd RO, and the signature of described server is for trueProtecting described signature is created by described server;
Wherein, described right objects moves ID that request message also comprises requesting service, serverID, equipment real data, current DRM time and the right objects identified by transmitting apparatus moveThe digital signature of request message,
The right objects that moves request message for described right objects from described server reception movesResponse message; And
Delete RO or the amendment status information relevant to issued RO issued.
2. method according to claim 1, wherein, generate the step of the 2nd RO comprise withLower step:
Utilize the private key of described transmitting apparatus or with the shared privacy key of described server come to send outThe RO of cloth decodes, and utilizes the PKI of described server or the guarantor shared with described serverDecryption key is encoded to decoded described issued RO.
3. method according to claim 1, wherein, described right objects moves response messageComprise that described right objects moves the treatment state of request message, receives described right objects and move soundAnswer ID, real data and the described right objects of the ID of the equipment of message, described server to move soundAnswer the digital signature of message as mandatory parameter.
4. method according to claim 1, if the RO wherein issuing has stateRO, comprises status information at issued RO.
5. method according to claim 1, wherein, the RO issuing is corresponding to equipmentIn RO and user domain RO one.
6. method according to claim 1, wherein, the RO issuing at least has movementRestriction.
7. one kind is transmitted the right objects RO being issued by this server between equipment via serverMethod, the method comprises the following steps:
Send ROAP by described server to transmitting apparatus and trigger message,
Described server from described transmitting apparatus receive right objects move request message with request viaDescribed server transmits the 2nd RO to receiving equipment, and described the 2nd RO is by described transmitting apparatus baseGenerate in issued RO, described right objects moves request message and comprises described the 2nd RO,Described the 2nd RO has except being included in<protectedRO>In element<ro>Element<encKey>Element and being included in<protectedRO>In element<mac>Beyond element with send outThe identical content of content of the RO of cloth;
If wherein described server has kept the RO issuing, described right objects moves requestMessage comprises the identifier of issued RO,
If wherein described the 2nd RO is included in described right objects and moves in request message,The signature of described server is also included within described the 2nd RO, and the signature of described server is for trueProtecting described signature is created by described server;
Wherein, described right objects moves ID that request message also comprises requesting service, serverID, equipment real data, current DRM time and the right objects identified by transmitting apparatus moveThe digital signature of request message,
Carry out the checking to described signature;
Described server sends for described right objects and moves request message to described transmitting apparatusRight objects moves response message;
The 2nd RO moving in request message based on described right objects generates the reception of giving to be passedThe 3rd RO of equipment; And
Transmit the 3rd RO generating to described receiving equipment.
8. method according to claim 7, wherein, described right objects moves response messageComprise that described right objects moves the treatment state of request message, receives described right objects and move soundAnswer ID, real data and the described right objects of the ID of the equipment of message, described server to moveThe digital signature of response message is as mandatory parameter.
9. method according to claim 7, wherein, generate the step of the 3rd RO comprise withAt least one in lower step:
Generating digital signature value;
Utilize the PKI of described receiving equipment or the privacy key shared with described receiving equipment before,Rights encryption key REK and MAC key are encoded; And
Generate mac value.
10. method according to claim 7, if the RO wherein issuing has stateRO, comprise status information at issued RO.
11. 1 kinds are located at the device of the right objects RO that between equipment, transmission is issued by serverIn transmitting apparatus, this transmitting apparatus comprises:
Digital copyright management DRM agency, it receives ROAP from server and triggers message, based onThe RO issuing generates the 2nd RO, generates right objects and moves request message, to described serviceDevice sends described right objects and moves request message, to ask via described server to receiving equipmentTransmit described the 2nd RO, described right objects moves request message and comprises described the 2nd RO, described inThe 2nd RO has except being included in<protectedRO>In element<ro>Element<encKey>UnitElement and be included in<protectedRO>In element<mac>Beyond element with issued RO inHold identical content,
If wherein described server has kept the RO issuing, described right objects moves requestMessage comprises the identifier of issued RO,
If wherein described the 2nd RO is included in described right objects and moves in request message,The signature of described server is also included within described the 2nd RO, and the signature of described server is for trueProtecting described signature is created by described server;
Wherein, described right objects moves ID that request message also comprises requesting service, serverID, equipment real data, current DRM time and the right objects identified by transmitting apparatus moveThe digital signature of request message,
Wherein said DRM agency also receives for described right objects and moves and ask from described serverAsk the right objects of message to move response message, and delete the RO that issues or amendment with issueThe relevant status information of RO;
Communication module, it receives described ROAP from described server and triggers message, to described serviceDevice sends described right objects and moves request message and receive described right objects and move response message.
12. transmitting apparatus according to claim 11, wherein, the RO issuing comprises:License to content and restriction.
13. transmitting apparatus according to claim 11, wherein, utilize the public affairs of described serverKey or before with the shared privacy key of described server to described rights encryption key REK andMAC key is encoded.
14. transmitting apparatus according to claim 11, wherein, described right objects moves pleaseAsking message is that the described server of request transmits described second via described server to described receiving equipmentThe message of RO.
15. 1 kinds are located at the device of the right objects RO that between equipment, transmission is issued by serverIn server, this server comprises:
Communication module, it is communicated by letter with receiving equipment with transmitting apparatus; And
Copyright publishing center RI, it cooperates to carry out following steps with described communication module:
Send ROAP to transmitting apparatus and trigger message,
Receive right objects from described transmitting apparatus and move request message to ask via described serverTransmit the 2nd RO to receiving equipment, described the 2nd RO is based on issued by described transmitting apparatusRO generates, and described right objects moves request message and comprises described the 2nd RO, described the 2nd ROHave except being included in<protectedRO>In element<ro>Element<encKey>Element and bagDraw together<protectedRO>In element<mac>Identical with the content of issued RO beyond elementContent;
If wherein described server has kept the RO issuing, described right objects moves requestMessage comprises the identifier of issued RO,
If wherein described the 2nd RO is included in described right objects and moves in request message,The signature of described server is also included within described the 2nd RO, and the signature of described server is for trueProtecting described signature is created by described server;
Wherein, described right objects moves ID that request message also comprises requesting service, serverID, equipment real data, current DRM time and the right objects identified by transmitting apparatus moveThe digital signature of request message,
Carry out the checking to described signature;
The right objects that moves request message for described right objects to described transmitting apparatus transmission is movedDynamic response message;
The 2nd RO moving in request message based on described right objects generates the reception of giving to be passedThe 3rd RO of equipment; And
Transmit the 3rd RO generating to described receiving equipment.
16. servers according to claim 15, wherein, when being included in described right objectsWhen the 2nd RO in mobile request message has mobile number of times restriction, described copyright publishing center RIRevise mobile number of times limits value.
17. servers according to claim 15, wherein, described right objects moves responseMessage comprises that described right objects moves the treatment state of request message, receives described right objects and moveThe ID of the equipment of dynamic response message, the ID of described server, real data and right objects moveThe digital signature of response message is as mandatory parameter.
CN200780003696.1A 2006-01-26 2007-01-25 Via server by right objects the apparatus and method from an equipment moving to another equipment Expired - Fee Related CN101375543B (en)

Applications Claiming Priority (11)

Application Number Priority Date Filing Date Title
KR1020060008575A KR20070078340A (en) 2006-01-26 2006-01-26 System and method for transfering content rights among devices
KR1020060008575 2006-01-26
KR10-2006-0008575 2006-01-26
US78723206P 2006-03-30 2006-03-30
US60/787,232 2006-03-30
US83349306P 2006-07-27 2006-07-27
US60/833,493 2006-07-27
KR1020060081343 2006-08-25
KR10-2006-0081343 2006-08-25
KR1020060081343A KR100830941B1 (en) 2006-03-30 2006-08-25 Method for moving rights object in digital rights management and device thereof
PCT/KR2007/000449 WO2007086697A1 (en) 2006-01-26 2007-01-25 Apparatus and method for moving rights object from one device to another device via server

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