CN101055608A - Digital copyright management and protection method - Google Patents
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- CN101055608A CN101055608A CNA2006100722249A CN200610072224A CN101055608A CN 101055608 A CN101055608 A CN 101055608A CN A2006100722249 A CNA2006100722249 A CN A2006100722249A CN 200610072224 A CN200610072224 A CN 200610072224A CN 101055608 A CN101055608 A CN 101055608A
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- 230000002452 interceptive effect Effects 0.000 claims description 7
- 238000012795 verification Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 4
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Abstract
The invention relates to a system and method for managing and protecting digital copyright. The system comprises a database server, a key pairs generating apparatus, a digital media file right certification device, a digital certificate apparatus, a DRM file pack device, a DRM file pack program downloading apparatus, a user right apparatus, a metadata apparatus as well as a digital media file playing device. The method includes that: the user downloads and disposes a DRM file pack program, packs the DRM for digital media file, and issues the DRM-packed digital media file, as well as certificates, authorizes and uses the DRM-packed digital media file right.
Description
Technical field
The present invention relates to a kind of digital copyright management (DRM) guard method, more precisely relate to the protection in intellecture property fields such as digital media file.
Background technology
Conventional digital copyright protection scheme is mainly by finishing such implementation in the system of sealing:
1. it is right that the key generator program generates the key that carries out the DRM operation
2. use such key that digital media file is packed
3. will distribute through the digital media file of DRM packing
When the consumer uses through the DRM packaging file, carry out the right authentication to the specified authenticating address of DRM file by player.When authenticate device confirmed that the consumer has lawful authority, this device sent a digital certificate to player.Accepting legal digital certificate, and after efficiency confirmed, player carried out file according to the rule of determining and plays.
Current when implementing such digital rights management operation, the right generation of key needs special application program or independent device to produce, and the key that generates is stored in the relatively independent database often needing in actual applications.Usually the device downloaded of digital certificate all with Verification System or charge system tight association to determine whether downloading correct digital certificate.
There are some realistic problems like this in such structure when reality is used:
1. current DRM system often is the proprietary system of sealing.Operation needs a large amount of professional knowledge and the experience in multi-disciplinary field with safeguarding such IT system.
2. the work that right generation, preservation, management, transmission and the use of key is a security requirement height, operation cost is high.Being difficult to non-professional personnel can easily finish.
3. because the tight binding of each system and charge system under the current techniques system, promptly this system is managed and is runed by value-added service provider or internet content or service provider, system's relative closure, the copyright owner can't obtain neutrality, independence, third party Digital Media right operating position data down based on the existing system framework.
So just cause and only have powerful fund and the organizing ability of IT background and enough develop and run a relative professional DRM system.
For medium and small copyright owner, because be subjected to implementing difficulty, the restriction of scale and cost causes:
1. medium and small copyright owner can not independently directly carry out the digital copyright management work of its digital media file.
2. medium and small copyright owner is difficult to customization and has its personalized DRM and billing solution.
Summary of the invention
The current continuous development of following Internet technology, value-added telecom services innovation technology and new media business has expedited the emergence of that a large amount of small scales, region are disperseed and the medium and small copyright owner of One's name is legion creates, distributes, sells, shares its knowledge-product by new technological means or mode.These intellectual property obligees' knowledge-product is when carrying out digitizing or using by the infotech means; because can not run under low-cost, high reliability environment, colony's part is had to abandon or is reduced requirement for digital copyright management (DRM) protection.Such reality causes the knowledge-product of such colony can not obtain fine protection, and the also corresponding increase of its knowledge-product risk in use.
Creation purpose of the present invention is to help such copyright owner safe, low-cost at height; highly reliable; high available; high flexibility; under the environment of resource sharing; by neutrality, independence, third party, Digital Media trusty right management method are provided, better its right product and digital media products are carried out better protection and management.
The object of the present invention is achieved like this; a kind of digital copyright management protection system is provided, and this system comprises: database server, metadata device, DRM file wrapper download apparatus, user right device, key are to generating apparatus, DRM file packing apparatus, digital media file right authenticate device, digital certificate device and digital media file playing device.
Wherein, database server be used to preserve that key pair information, Digital Media metadata, Digital Media right information, authority of a user information, client's right information, digital certificate release news, user capture and interactive information, platform operation associated metadata.
The metadata device is used to handle the Digital Media metadata, generator uniform data identifier or with respective meta-data information preserve with database server in device.
DRM file wrapper download apparatus is used to provide and disposes DRM file wrapper install software, and can be the device that the client downloads.
User right device, record allow to use the DRM wrapper to carry out the device of the user right of digital media file DRM encryption.
Key is used to use DRM key Core Generator to generate the right device of key to generating apparatus, and key is to comprising a private key and a PKI.
DRM file packing apparatus is used for digital media file is carried out the device of DRM packing, in the packing process employed DRM key to from key to obtaining the generating apparatus.
Digital media file right authenticate device is used for the device that the right to access to the digital media file user authenticates; This device is judged interest field and validity according to the authority of a user situation, informs that then which kind of digital certificate the digital certificate device sends to subscriber equipment.
The digital certificate device is used for generating digital certificate according to the determined right content of right authenticate device and scope, and digital certificate is published to device on the digital media file playing device.
The digital media file playing device is used for the device of playing digital medium file.
In another embodiment, provide a kind of digital copyright management and protection method, said method comprising the steps of:
The user starts the DRM software packaging at DRM file packing apparatus, and signs in to the DRM system by the DRM software packaging; Login mode may be based on IP address range, and the login of single authentication point (Single-sign on, SSO), username-password is in biological identification technology or other login mode login systems;
The user right device receives from DRM file packing apparatus about user's logon rights checking solicited message; If verifying authorization is effective, then the user right device returns authentification of user to DRM file packing apparatus and passes through information; If verifying authorization is invalid, then the user right device returns the authentification of user invalid information to DRM file packing apparatus;
The user is written into the metadata of the digital media file that need carry out the DRM protection in DRM file packing apparatus;
DRM file packing apparatus to key to generating apparatus application to can be used for the key of DRM protection right;
It is right that key generates key to generating apparatus, and with key to returning DRM file packing apparatus;
DRM file packing apparatus is provided in the metadata device with information such as user profile, metadata, and by the metadata device by the database server stores metadata;
The metadata device generates respective meta-data and unifies identifier, and this identifier is synchronized to DRM file packing apparatus; Metadata is unified the identification method that identifier is a kind of ISRC of being similar to or ISBN, in order to the sign of a Digital Media of unique identification metadata.
DRM file packing apparatus is unified identifier, user profile, key pair information etc. with metadata and is stored in the database server;
DRM file packing apparatus carries out DRM packing to information such as, digital certificate checking address URI, metadata to digital media file according to key;
The DRM file distribution is on destination device or storage medium.
The user also comprised before DRM file packing apparatus starts DRM software packaging step: the user downloads the DRM wrapper to DRM file packing apparatus from DRM file wrapper download apparatus, carries out DRM packing installation procedure at DRM file packing apparatus the DRM software packaging is installed.
Described method also comprises the authentication of use right and the authorisation step of DRM file.
The use right authentication of described DRM file may further comprise the steps with authorisation step:
The user sends the playing digital medium file instruction to the digital media file playing device;
Whether the digital media file playing device judges digital media file through the DRM protection, if digital media file is not through DRM protection, then digital media file playing device playing digital medium file; If digital media file then enters into the DRM verification process through the DRM protection.
Wherein verification process comprises:
The digital media file playing device is according to the digital certificate of the URI information that is comprised in the DRM information to the digital certificate device application playing digital medium file of appointment;
The digital media file playing device sent about the digital certificate solicited message, at first handle through load management device, solicited message is assigned to only digital certificate device handles;
The digital certificate device receives the digital certificate right request from the digital media file playing device;
The digital certificate device is with user authentication information in the right request, and solicited messages such as digital media file claim are forwarded to digital media file right authenticate device;
Digital media file right authenticate device obtains the right request and confirms right validity, if the right that the user asked is invalid, digital media file right authenticate device returns the right invalid information to the digital certificate device, and the digital certificate device returns the right invalid information to the digital media file playing device; If the right that the user asked is effective, digital media file right authenticate device returns right validity information to the digital certificate device, and the digital certificate device is issued the digital certificate of the playing digital medium file that has the respective right content to the digital media file playing device;
The digital media file playing device is according to right content that is comprised in the digital certificate and scope playing digital medium file.
In one embodiment of the invention, carry out coded communication between DRM digital certificate device and the digital media file right authenticate device.
In another embodiment, DRM file packing apparatus and metadata device, key adopt the mode through symmetric cryptography to communicate to communication between generating apparatus, the user right device.
Metadata comprises Digital Media format information, digital media content information, Digital Media copyright information.
Wherein, the Digital Media format information comprises: file layout, filename, file extension, Digital Media time span, File Compress algorithm, displaying ratio, code stream, fixedly code stream or variable code stream.
Digital media content comprises: metadata is unified identifier, media content title, media content brief introduction, the lyrics, dialogue, evaluation, rating information, music assorting, disc name, ISRC numbering.
The Digital Media copyright information comprises: copyright owner's information, people adjacent to the right's information, recording copyright information, right of mechanograph information, the right scope of authority, right sublicense information, license the region, license media format, license type of service, license start time, the concluding time of licensing.
Described digital media file playing device is computing machine, mobile communication terminal, portable media playing apparatus or other digital medium player.
The application's advantage and effect are:
1. make digital copyright management and protection system become open system by the resource sharing mode, the service of safe enough, low cost, high availability can be provided for medium and small copyright owner by closed system.
2. Fu Za maintenance work is concentrated in the limited scope, and the copyright owner does not need to build identical system for the overlapping investment of IT part.
3. support media use the right interface, and digital media file security system thus ensures, and digital media file uses the affirmation of right to be responsible for by outside autonomous system.Such operating mode provides possibility for medium and small copyright owner customizes the authentification of user application of oneself and charges to use.
4. the copyright owner does not need to drop into extra energy in the face of complicated internet environment again in the face of digital certificate distribution link the time.
5. the copyright owner can obtain independent, third party's copyright operating position data by the third party's autonomous system that is provided by the DRM system.These data help relevant royalty computational activity, also help the environment that breaks the wall of mistrust between the upstream and downstream in the copyright trading process.
Description of drawings
Accompanying drawing 1 is that device of the present invention is disposed and the johning knot composition;
Accompanying drawing 2 is user's download and the process flow diagram of disposing DRM media file packing application;
Accompanying drawing 3 is a process flow diagram of digital media file being implemented copyright management protection;
Accompanying drawing 4 is the process flow diagram through right authentication of digital copyright management encrypted digital media file and mandate.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is made further detailed description below in conjunction with accompanying drawing.
Accompanying drawing 1 is disposed and the johning knot composition for apparatus of the present invention.The inventive system comprises database server, digital copyright management relevant apparatus and playing device, its concrete annexation as shown in Figure 1.This device comprises that database server, key are to generating apparatus, digital media file right authenticate device, digital certificate device, DRM file packing apparatus, DRM file wrapper download apparatus, user right device, metadata device, digital media file playing device and load management device.
Wherein, database server is used to preserve that key pair information, Digital Media metadata, Digital Media right information, authority of a user information, client's right information, digital certificate release news, data such as user capture and interactive information, platform operation associated metadata.The metadata device is used to handle the Digital Media metadata, generator uniform data identifier or with respective meta-data information preserve with database server in.Metadata is unified the identification method that identifier is a kind of ISRC of being similar to or ISBN, in order to the sign of a Digital Media of unique identification metadata.DRM file wrapper download apparatus is used to provide and disposes DRM file wrapper install software, and can be the device that the client downloads.The user right that user right device, record allow use DRM wrapper to carry out digital media file DRM encryption.Key is to generating apparatus, and it is right to be used to use DRM key Core Generator to generate key, and key is to comprising a private key and a PKI.The key that generates is to carrying out communication by interface and relative clients end program that can be accessed, and communication process is protected transmission security with cryptographic means.DRM file packing apparatus is used for the device that digital media file carries out DRM packing, in the packing process employed DRM key to from key to obtaining the generating apparatus.DRM file packing apparatus also can carry out real-time live encryption to video flowing and/or the audio stream that does not carry out the DRM packing, and carries out the live TV stream issue by other relevant distribution apparatus.Digital media file right authenticate device is used for digital media file user's right to access is authenticated.This device is judged interest field and validity according to the authority of a user situation, informs that then which kind of digital certificate the digital certificate device sends to the digital media file playing device.The digital certificate device is used for generating digital certificate according to the determined right content of right authenticate device and scope, and digital certificate is published to device on the digital media file playing device.The digital media file playing device is used for the device of playing digital medium file, including but not limited to computing machine, mobile communication equipment, portable media playing apparatus and other digital medium player.Load management device is used for according to the client access address, with the client access location device that system call is used that is used for rational position.
For the system of being built based on multi-process or multithreading operation system environments or other software and hardware system environment, one or several of above-mentioned hardware unit or server may merge aspect device or the server disposition in implementation process.Such merging belongs to the combination of being carried out of existing software or hardware device, can realize under such system architecture.
Process flow diagram below in conjunction with accompanying drawing 2-4 explanation digital copyright management and protection method of the present invention.
Accompanying drawing 2 has illustrated user's download and has disposed the process flow diagram that the packing of DRM media file is used.In steps A 101, user's download DRM wrapper is to DRM file packing apparatus.In steps A 102, the user carries out DRM packing installation procedure in DRM file packing apparatus the DRM software packaging is installed.In steps A 103, DRM file packing apparatus is carried out the installation of DRM software packaging.
Accompanying drawing 3 is a process flow diagram of digital media file being implemented copyright management protection.At first carry out the making of DRM file.In steps A 201, the user starts the DRM software packaging at DRM file packing apparatus, and signs in in the DRM system by the DRM software packaging.In steps A 202, if the user right device is local cluster or strange land cluster, load management device is that DRM file packing apparatus selects to connect the machine in the only user right device.In steps A 203, the user right device receives from DRM file packing apparatus about user's logon rights checking solicited message.In steps A 204, if verifying authorization is effective, then the user right device returns authentification of user to DRM file packing apparatus and passes through information.In steps A 205, if verifying authorization is invalid, then the user right device returns the authentification of user invalid information to DRM file packing apparatus.
Steps A 206, the user is written into the metadata of the digital media file that need carry out the DRM protection in DRM file packing apparatus.Steps A 207, the user is written into the digital media file that need carry out the DRM packing in DRM file packing apparatus.Steps A 208, DRM file packing apparatus to key to generating apparatus application to can be used for the key of DRM protection right, this communication process interactive information is protected by symmetric cryptosystem.Steps A 209, it is right that key generates key to generating apparatus, and with key to returning DRM file packing apparatus.Steps A 210, DRM file packing apparatus passes through the metadata device recording in database server with information such as user profile, metadata, and this communication process interactive information is protected by symmetric cryptosystem.Steps A 211, metadata device generate respective meta-data and unify identifier, and this identifier is synchronized in the DRM file packing apparatus, and this communication process interactive information is protected by symmetric cryptosystem.Steps A 212, DRM file packing apparatus are unified identifier, user profile, key pair information etc. with metadata and are stored in the database server, and this communication process interactive information is protected by symmetric cryptosystem.In steps A 213, DRM file packing apparatus carries out DRM packing to information such as, digital certificate checking address URI, metadata to digital media file according to key.
Next be the issue of DRM file, the DRM file distribution can be by memory device, stores such as Streaming Media host-host protocol, Email, FTP, HTTP, portable movable storage device, light media storage devices, magnetic medium memory devices, transmit, copy on destination device or the storage medium.Because media file has passed through the DRM encipherment protection, such digital media file can not cause the situation of illegal use to take place because of the factor of distribution of contents.
Be the authentication of use right and mandate of DRM file at last, described with reference to accompanying drawing 4.Steps A 301, the user sends the playing digital medium file instruction to the digital media file playing device.Steps A 302, digital media file playing device judge that whether digital media file is through the DRM protection.Steps A 310 is not if digital media file is through DRM protection, then digital media file playing device playing digital medium file.If digital media file then enters into the DRM verification process through the DRM protection, the digital media file playing device is according to the digital certificate of the URI information that is comprised in the DRM information to the digital certificate device application playing digital medium file of appointment.Digital media file is play about the digital certificate solicited message, at first handles through load management device, solicited message is assigned to only digital certificate device handles, shown in steps A 303.The digital certificate device receives the digital certificate right request from the digital media file playing device, as steps A 304.The digital certificate device is with user authentication information in the right request, and solicited messages such as digital media file claim are forwarded to digital media file right authenticate device, as steps A 305.Digital media file right authenticate device obtains the right request and confirms right validity, as steps A 306.If the right that the user asked is invalid, digital media file right authenticate device returns the right invalid information to the digital certificate device, and the digital certificate device returns the right invalid information to the digital media file playing device, as steps A 308.If the right that the user asked is effective, digital media file right authenticate device returns right validity information to the digital certificate device, the digital certificate device is issued the digital certificate in order to the playing digital medium file that has the respective right content to the digital media file playing device, as steps A 307.The digital media file playing device is according to right content that is comprised in the digital certificate and scope playing digital medium file, as steps A 309.
Although described exemplary embodiment here in conjunction with the accompanying drawings, be understandable that the present invention is not limited to those definite embodiment, do not departing from the scope of the present invention or spiritual those of ordinary skill in the related art can implement wherein various variations and modification.Variation that all are such and modification are defined as being included in the category of the present invention of accessory claim elaboration.
Claims (21)
1. digital copyright management protection system; described system comprises that database server, metadata device, DRM file wrapper download apparatus, user right device, key to generating apparatus, DRM file packing apparatus, digital media file right authenticate device, digital certificate device and digital media file playing device, is characterized in that:
Database server is used to preserve that key pair information, Digital Media metadata, Digital Media right information, authority of a user information, client's right information, digital certificate release news, user capture and interactive information, platform operation associated metadata;
The metadata device is used to handle the Digital Media metadata, generator uniform data identifier or with respective meta-data information preserve with database server in device;
DRM file wrapper download apparatus is used to provide and disposes DRM file wrapper install software, and can be the device that the client downloads;
User right device, record allow to use the DRM wrapper to carry out the device of the user right of digital media file DRM encryption;
Key is used to use DRM key Core Generator to generate the right device of key to generating apparatus, and key is to comprising a private key and a PKI;
DRM file packing apparatus is used for digital media file is carried out the device of DRM packing, in the packing process employed DRM key to from key to obtaining the generating apparatus;
Digital media file right authenticate device is used for the device that the right to access to the digital media file user authenticates; This device is judged interest field and validity according to the authority of a user situation, informs that then which kind of digital certificate the digital certificate device sends to subscriber equipment;
The digital certificate device is used for generating digital certificate according to the determined right content of right authenticate device and scope, and digital certificate is published to device on the digital media file playing device;
The digital media file playing device is used for the device of playing digital medium file.
2. the system as claimed in claim 1 is characterized in that described system also comprises:
Load management device is used for according to the client access address, and the running load of each treating apparatus and other relevant factor are positioned client access in the device that system call is used that is used for of rational position.
3. the system as claimed in claim 1 is characterized in that:
Carry out coded communication between digital certificate device and the digital media file right authenticate device.
4, the system as claimed in claim 1 is characterized in that:
DRM file packing apparatus and metadata device, key adopt the mode through symmetric cryptography to communicate to communication between generating apparatus, the user right device.
5, the system as claimed in claim 1 is characterized in that:
Described metadata comprises Digital Media format information, digital media content information, Digital Media copyright information.
6, system as claimed in claim 5 is characterized in that:
The Digital Media format information comprises: file layout, filename, file extension, Digital Media time span, File Compress algorithm, displaying ratio, code stream, fixedly code stream or variable code stream.
7, system as claimed in claim 5 is characterized in that:
Digital media content comprises: metadata is unified identifier, media content title, media content brief introduction, the lyrics, dialogue, evaluation, rating information, music assorting, disc name, ISRC numbering.
8, system as claimed in claim 5 is characterized in that:
The Digital Media copyright information comprises: copyright owner's information, people adjacent to the right's information, recording copyright information, right of mechanograph information, the right scope of authority, right sublicense information, license the region, license media format, license type of service, license start time, the concluding time of licensing.
9, the system as claimed in claim 1 is characterized in that:
Described digital media file playing device is computing machine, mobile communication terminal, portable media playing apparatus or other digital medium player.
10, a kind of digital copyright management and protection method said method comprising the steps of:
A. the user starts the DRM software packaging at DRM file packing apparatus, and signs in to the DRM system in some way by the DRM software packaging;
B. the user right device receives from DRM file packing apparatus about user's logon rights checking solicited message; If verifying authorization is effective, then the user right device returns authentification of user by information to DRM file packing apparatus, if verifying authorization is invalid, then the user right device returns the authentification of user invalid information to DRM file packing apparatus;
C. the user is written into the metadata of the digital media file that need carry out the DRM protection in DRM file packing apparatus;
D.DRM file packing apparatus to key to generating apparatus application to can be used for the key of DRM protection right;
E. that generating apparatus is generated key is right for key, and with key to returning DRM file packing apparatus;
F.DRM file packing apparatus is provided in the metadata device with information such as user profile, metadata, and by the metadata device by the database server stores metadata;
G. metadata device generation respective meta-data is unified identifier, and this identifier is synchronized to DRM file packing apparatus;
H.DRM file packing apparatus is unified identifier, user profile, key pair information etc. with metadata and is stored in the database server;
I.DRM file packing apparatus carries out DRM packing to information such as, digital certificate checking address URI, metadata to digital media file according to key;
The j.DRM file distribution is on destination device or storage medium.
11, method as claimed in claim 10 also comprised before step a:
A1. the user downloads the DRM wrapper to DRM file packing apparatus from DRM file wrapper download apparatus, carries out DRM packing installation procedure at DRM file packing apparatus the DRM software packaging is installed.
12, method as claimed in claim 10 is characterized in that described method further comprises the authentication of use right and the authorisation step of DRM file.
13, method as claimed in claim 12 is characterized in that the use right authentication of described DRM file may further comprise the steps with authorisation step:
The user sends the playing digital medium file instruction to the digital media file playing device;
Whether the digital media file playing device judges digital media file through the DRM protection, if digital media file is not through DRM protection, then digital media file playing device playing digital medium file; If digital media file then enters into the DRM verification process through the DRM protection.
14, method as claimed in claim 13 is characterized in that described DRM verification process comprises:
The digital media file playing device is according to the digital certificate of the URI information that is comprised in the DRM information to the digital certificate device application playing digital medium file of appointment;
The digital media file playing device sent about the digital certificate solicited message, at first handle through load management device, solicited message is assigned to only digital certificate device handles;
The digital certificate device receives the digital certificate right request from the digital media file playing device;
The digital certificate device is with user authentication information in the right request, and solicited messages such as digital media file claim are forwarded to digital media file right authenticate device;
Digital media file right authenticate device obtains the right request and confirms right validity, if the right that the user asked is invalid, digital media file right authenticate device returns the right invalid information to the digital certificate device, and the digital certificate device returns the right invalid information to the digital media file playing device; If the right that the user asked is effective, digital media file right authenticate device returns right validity information to the digital certificate device, and the digital certificate device is issued the digital certificate of the playing digital medium file that has the respective right content to the digital media file playing device;
The digital media file playing device is according to right content that is comprised in the digital certificate and scope playing digital medium file.
15, method as claimed in claim 10 is characterized in that:
Carry out coded communication between digital certificate device and the digital media file right authenticate device.
16, method as claimed in claim 10 is characterized in that:
DRM file packing apparatus and metadata device, key adopt the mode through symmetric cryptography to communicate to communication between generating apparatus, the user right device.
17, method as claimed in claim 10 is characterized in that:
Described metadata comprises Digital Media format information, digital media content information, Digital Media copyright information.
18, method as claimed in claim 17 is characterized in that:
The Digital Media format information comprises: file layout, filename, file extension, Digital Media time span, File Compress algorithm, displaying ratio, code stream, fixedly code stream or variable code stream.
19, method as claimed in claim 17 is characterized in that:
Digital media content comprises: metadata is unified identifier, media content title, media content brief introduction, the lyrics, dialogue, evaluation, rating information, music assorting, disc name, ISRC numbering.
20, method as claimed in claim 17 is characterized in that:
The Digital Media copyright information comprises: copyright owner's information, people adjacent to the right's information, recording copyright information, right of mechanograph information, the right scope of authority, right sublicense information, license the region, license media format, license type of service, license start time, the concluding time of licensing.
21, method as claimed in claim 10 is characterized in that:
Described digital media file playing device is computing machine, mobile communication terminal, portable media playing apparatus or other digital medium player.
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| CNA2006100722249A CN101055608A (en) | 2006-04-14 | 2006-04-14 | Digital copyright management and protection method |
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| CNA2006100722249A CN101055608A (en) | 2006-04-14 | 2006-04-14 | Digital copyright management and protection method |
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| CN101833623A (en) * | 2010-05-07 | 2010-09-15 | 华为终端有限公司 | Digital rights management method and system |
| CN101399663B (en) * | 2008-10-14 | 2010-10-20 | 北京大学 | A digital content authorization method, system and device |
| CN102065096A (en) * | 2010-12-31 | 2011-05-18 | 惠州Tcl移动通信有限公司 | Player, mobile communication equipment, authentication server, authentication system and method |
| CN102122336A (en) * | 2011-02-14 | 2011-07-13 | 中国联合网络通信集团有限公司 | Method, equipment and system for encrypting and decrypting game protection |
| CN101610148B (en) * | 2009-07-08 | 2012-08-08 | 深圳市易万卷文化产业有限公司 | Protection method of digital copyrights of peer-to-peer Internet network |
| CN103023915A (en) * | 2012-12-26 | 2013-04-03 | 广东欧珀移动通信有限公司 | Method and system for protecting copyrights of downloaded books for mobile terminal |
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