CN103971033B - A kind of digital copyright management method tackling illegal copies - Google Patents
A kind of digital copyright management method tackling illegal copies Download PDFInfo
- Publication number
- CN103971033B CN103971033B CN201410219153.5A CN201410219153A CN103971033B CN 103971033 B CN103971033 B CN 103971033B CN 201410219153 A CN201410219153 A CN 201410219153A CN 103971033 B CN103971033 B CN 103971033B
- Authority
- CN
- China
- Prior art keywords
- licence
- initial
- user
- file
- information
- 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
Links
- 238000007726 management method Methods 0.000 title claims abstract description 13
- 230000006855 networking Effects 0.000 claims abstract description 33
- 238000012795 verification Methods 0.000 claims abstract description 31
- 238000009434 installation Methods 0.000 claims abstract description 3
- 238000013475 authorization Methods 0.000 claims description 24
- 239000000284 extract Substances 0.000 claims description 17
- 238000012856 packing Methods 0.000 claims description 6
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 11
- 239000000203 mixture Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000004899 motility Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
- G06F21/105—Arrangements for software license management or administration, e.g. for managing licenses at corporate level
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/602—Providing cryptographic facilities or services
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Software Systems (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Computer Security & Cryptography (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Technology Law (AREA)
- Multimedia (AREA)
- Health & Medical Sciences (AREA)
- Bioethics (AREA)
- General Health & Medical Sciences (AREA)
- Storage Device Security (AREA)
Abstract
The invention discloses a kind of digital copyright management method tackling illegal copies, relate to field of information security technology.This method is: 1. content server carries out on-demand encryption, is packaged into treated protection file rear mount to the Internet for user's download initial data；2. user installation client software；3. user uses client software at user terminal, if local verification passes through, then user can use protection file in the case of not networking；4., when local verification failure, user needs to carry out networking checking；5. local verification by or networking be verified after, use initial data.Licence is encrypted and decrypted by the symmetric key that the present invention utilizes the hardware information of user terminal to generate encryption and deciphering, thus realizes local verification, and one is authorized, and user can open file in the case of not networking；User cannot again authorize without networking and normally open, thus effectively coped with illegal copies.
Description
Technical field
The present invention relates to field of information security technology, particularly relate to a kind of digital copyright management side tackling illegal copies
Method.
Background technology
Digital copyright management (Digital Rights Management is called for short DRM) refers to that content publisher is in order to control
The right to use of digital content and the copyright of protection digital document, the comprehensive solution taked based on information security technology.With
Developing rapidly and the raising of Streaming Media compress technique of Internet, various digital documents are in a network by extensively, optionally
Distribution, makes content publisher suffer huge loss.Use and propagation seems the heaviest thereby it is ensured that digital document is legal
Want.
After digital document is bought by user as commodity, we are difficult to control it and are not replicated and propagate, because cannot be real
Existing digital document directly bundlees with user's, and the information (user name, password etc.) of user is available for removing as many physical goods
Beyond purchaser, other people uses, to this end, the binding relationship that we should additionally find a kind of essence will not directly be tied
The digital document tied up links together with user, thus strengthens the management to copyright.
In the workflow of tradition DRM, user must first obtain the licence of correspondence before opening digital document, passes through
Legal licence, user could normally open digital document.Wherein, part DRM method requires that user opens numeral literary composition every time
Will carry out verifying to get a license by network before part, and at once licence be destroyed after use；And another part
DRM method is only required and is obtained licence when using digital document for the first time, is protected with document form by licence after acquisition
Deposit, directly from file read when using digital document backward.Previous class DRM method can realize the safest, easily to being permitted
The management that can demonstrate,prove, but once user can not network and just can not use shielded digital document, the burden of authorization server simultaneously
The heaviest；Latter class DRM method allows user can use shielded digital document under off-line state, carries well
Having risen family experience, but the management of licence becomes new problem, once licence is together copied with digital document and propagates,
Other undelegated users will be made to could be used that digital document.So, after lifting motility and reliability are as much as possible
The key that continuous DRM method can not be ignored.
Summary of the invention
The purpose of the present invention is that the shortcoming and defect overcoming prior art to exist, it is provided that a kind of illegal copies of tackling
Digital copyright management method.
The object of the present invention is achieved like this:
A kind of digital copyright management method (abbreviation method) tackling illegal copies
This method comprises the following steps:
1. content server carries out on-demand encryption, is packaged into treated protection file rear mount to interconnection initial data
Online for user's download, meanwhile, content server will protect the product information of file, right information and key to send to authorizing clothes
Business device, is stored in data base by it；
2. user installation client software, and by the Internet download or copied content server is sent out from other equipment
The protection file of cloth is on user terminal；
3. user is when user terminal uses client software to open protection file, and in client software, DRM controller is first
First protection file being carried out local verification, if local verification passes through, then user can use protection literary composition in the case of not networking
Part；
4., when local verification failure, user needs to carry out networking checking, otherwise can not use protection file, when this locality is tested
Demonstrate,prove successful user and want to obtain the right to use of more protection file in limited time, it is also desirable to carry out networking checking；
5. local verification by or networking be verified after, DRM controller is current according to initial right and licence
State extracts the initial data in protection file, the right information constraint built-in application journey comprised according to initial right and licence
Sequence uses initial data.
The present invention has following advantages and a good effect:
1. utilize user terminal hardware information generate encryption and deciphering symmetric key licence is encrypted and
Deciphering, thus realize local verification, one is authorized, and user can open file in the case of not networking；
Even if 2. user will carry the protection file copy of legal licence to other equipment, also cannot be without networking
Again authorize and normally open (freely copying within the rule in same terminal), thus effectively coped with illegal copies.
Accompanying drawing explanation
Fig. 1 is the block diagram of system for numeral copyright management；
10 user terminals,
11 protection file data bags,
12 client softwares,
121 DRM controllers, 122 built-in application programs, 123 licensc e data bags；
20 content servers
21 content repository, 22 product information storehouses, 23 DRM packing devices；
30 authorization servers,
31 entitlements database, 32 keys and product database,
33 DRM licence generators, 34 customer data bases.
Fig. 2 is the block diagram of metadata；
Fig. 3 is local verification flow chart；
Fig. 4 is networking checking flow chart.
Detailed description of the invention
Describe in detail with embodiment below in conjunction with the accompanying drawings:
One, system
1, overall
Such as Fig. 1, native system includes interconnective user terminal 10, content server 20 and authorization server 30；
The working mechanism of native system:
Content server 20 is responsible for generating protection file and setting the initial right of protection file；User terminal 10 is from content
Server 20 obtains protection file；Product information, right information and key are sent to authorization server 30 by content server 20,
Preserved by it；Content server 20 sends authorized application to authorization server 30, after authorization server 30 empirical tests by network
To user terminal 10 licensure.
2, functional device
1) user terminal 10
User terminal 10 is the hardware device that user uses protection file, mainly includes all kinds of portable type electronic product, such as:
Computer, mobile phone, iPOD (the music player product of Apple) and iPAD (the panel computer product of Apple) etc..
User terminal 10 includes protecting file data bag 11 and client software 12；Client software 12 includes DRM control
Device 121, built-in application program 122 and licensc e data bag 123；
Protection file data bag 11 is packed by metadata and encrypted initial data and is formed, and built-in application program 122 is used
Open and use protection file in initial data；
Such as Fig. 2, metadata 201 is by authorized address 202, initial right 203, licence 204 and product information 205 4 part
Data constitute, licence is made up of Hash identifying code 206, right 207 and key 208 again.
2) content server 20
Content server 20 is the place being encrypted digital content and packing and generate protection file.
Content server 20 includes content repository 21, product information storehouse 22 and DRM packing device 23；
Content repository 21 and product information storehouse 22 are connected with DRM packing device 23 respectively.
3) authorization server 30
Authorization server 30, also known as license server, checking and the digital content of user identity are made by main being responsible for
With generation and the distribution of licence.
Authorization server 30 includes entitlements database 31, key and product database 32, DRM licence generator 33 and uses
User data storehouse 34；
Entitlements database 31, key and product database 32 and customer data base 34 respectively with DRM licence generator 33
Connect.
Two, this method be embodied as step
1,1. described step is subdivided into following steps:
Original content file is designated as File1 by A, content supplier, then is uploaded to content server together with metadata, unit
License field in data is filled by NUL entirely, and initial rights field is then filled according to practical situation, if protection file is permitted
Family allowable freely has part authority, then the authority that initial rights field record freely uses, otherwise, initial rights field is also used
NUL is filled；
File1 is encrypted by B, content server according to the initial right in metadata, be available for user freely use or
The part browsed is not encrypted, and remainder is all encrypted, if initial rights field is sky, and encryptions whole to original content file,
The key K that encryption useseWith decruption key KdGenerated by content server temporarily；
Metadata and File1 are packed by the DRM packing device in C, content server, meanwhile, by claim, deciphering
Key KdSend to authorization server with product information, be stored in the data base of authorization server；
D, content server, by packed protection file, are designated as File2, under carry to the Internet supplying user freely
Carry；
The protection product information of file File2, right information and key are sent to authorization server by E, content server,
Be stored in data base by it, for user network checking time.
2, such as Fig. 3,3. described step is subdivided into following steps:
Local verification starts 301；
A, DRM controller reads the metadata fields 302 of protection file File2 head；
Whether b, the license field judged in metadata are existence 303, are then to enter step c, otherwise jump to step
g；
License field does not exists, and means that File2 not yet lives through networking and authorizes, otherwise shows that File2 exists this moment
Licence；
C, DRM controller extracts the hardware information of user terminal, and according to hardware information by function KeyGeneration
Calculate the symmetric key K of licences, meanwhile, DRM controller calculates Kazakhstan according to hardware information by function ConputeHash
Uncommon value H 304；
D, DRM controller reads license field, and the license information now read is in encrypted state, it is impossible to directly obtain
Get the internal information of licence, the most first use KsThe license field read out is decrypted, obtains the plaintext of licence,
Then licence is judged by the mode that detection cryptographic Hash H is the most equal with the Hash identifying code in the license field after deciphering
The most legal 305；
E, judge licence the most legal 306, be then entrance step f, otherwise jump to step g；
Cryptographic Hash H is equal with the Hash identifying code in the license field after deciphering, then show that the licence in File2 is true
It is that this user terminal verifies the legal licence issued by authorization server by networking in fact, otherwise means to protect file
File2 is to copy from other equipment, and the licence comprised in it is illegal；
F, DRM controller extracts the initial rights field 307 in protection file File2 metadata, and step is 5. middle can basis
The presence or absence of initial right extracts the initial data in protection file, so far, local verification success, and tests without carrying out networking again
Card 308, local verification terminates 313；
G, DRM controller extracts the initial rights field 309 in protection file File2 metadata；
H, judge whether initial right exists 310, be then local verification success, if but user want to obtain more authority, also
Being to need to carry out checking 311 of networking, local verification terminates 313；
Otherwise local verification failure, needs to carry out checking 312 of networking further, shows that initial right does not exists, the most also
Represent that local verification terminates 313.
3, such as Fig. 4,4. described step is subdivided into following steps:
Networking checking beginning 401；
I, the product information during DRM controller reads protection file File2 metadata, the mandate clothes in authorized address field
Business device address and the user profile of client currently logged on user, and extract the hardware information of user terminal, then to authorizing clothes
Business device transmission authorized application 402:
II, whether authorization server detection user have purchased the protection file File2 right to use on this user terminal
403；
III, judge whether user buys authority 404, be then to enter step IV, otherwise jump to step VIII；
IV, authorization server uses use authority and the original contents literary composition of protection file File2 in terminal according to user
The decruption key K of part File1dGeneration licence 405:
V, authorization server calculates licence according to the hardware information of user terminal by function KeyGeneration
Symmetric key Ks, and use key KsLicence is encrypted 406；
VI, the licence after encryption is sent to client 407 by authorization server；
VII, networking is proved to be successful 408, so far, and networking checking end 412；
VIII, authorization server buys authority 409 by Client-Prompt user；
Ⅸ, judge whether user buys authority 410, be, jump to step IV, otherwise enter step Ⅹ；
Ⅹ, authorization server refusal authorizes, authentication failed of networking, so far, and networking checking end 412.
4,5. described step is subdivided into following steps:
1) local verification and networking checking are after one of them passes through, DRM controller according to the request of built-in application program and
The state of current initial right and licence extracts initial data in plain text and the possible shape of right information, initial right and licence
State has following 3 kinds:
State 1: initial right information does not exists, and licence exists and legal；
State 2: initial right information exists, although licence does not exists or exists but illegal；
State 3: initial right information exists, and licence there is also and legal；
When the state of initial right and licence is state 1: symmetric key K first used by DRM controllersLicence is carried out
Deciphering, obtains the right information in licence and the decruption key K of initial datad, the request further according to built-in application program is used
Key KdCipher text part corresponding in initial data is decrypted thus obtains the cleartext information of initial data；
When the state of initial right and licence is state 2: DRM controller extracts initial right information, according to initially
Right information record unencrypted original data region, then the request extracting directly unencrypted according to built-in application program is original
Data clear text, if the original contents of built-in application PROGRAMMED REQUESTS is beyond the region of record, then refusal provides data and points out user
Buy corresponding authority；
When the state of initial right and licence is state 3: first DRM controller extracts initial right information, and root
According to initial right information record unencrypted original data region, secondly, DRM controller symmetric key KsLicence is carried out
Deciphering, obtains the right information in licence and the decruption key K of initial datad, finally, DRM controller is according to built-in application
The current desired initial data wanted of program judges whether the initial data in this region is in encrypted state, is recorded if belonging to
Unencrypted region, then extracting directly, the most first use key KdIt is decrypted required original data portion to extract again and decrypts
Initial data in plain text；
2) the initial data plaintext transmission extracted for it and is operated by DRM controller to built-in application program, with
Time, initial data is operated by the right information constraint built-in application program that DRM controller comprises according to initial right and licence.
Claims (1)
1. tackle a digital copyright management method for illegal copies,
1. content server carries out on-demand encryption, is packaged into treated protection file rear mount to the Internet initial data
Downloading for user, meanwhile, the protection product information of file, right information and key are sent to authorization service by content server
Device, is stored in data base by it；
2. user installation client software, and by the Internet download or copied content server issue from other equipment
Protect file to user terminal；
3. user is when user terminal uses client software to open protection file, and in client software, DRM controller is the most right
Protection file carries out local verification, if local verification passes through, then user can use protection file in the case of not networking；
4., when local verification failure, user needs to carry out networking checking, otherwise can not use protection file, when local verification becomes
The user of merit wants to obtain the right to use of more protection file in limited time, it is also desirable to carry out networking checking；
5. local verification by or after networking is verified, DRM controller is according to the current state of initial right and licence
Extract the initial data in protection file, make according to the right information constraint built-in application program that initial right and licence comprise
Use initial data；
It is characterized in that:
1. described step is subdivided into following steps:
Original content file is designated as File1 by A, content supplier, then is uploaded to content server, metadata together with metadata
In license field entirely with NUL fill, initial rights field then according to practical situation fill, if protection file allow use
Family freely has part authority, the then authority that initial rights field record freely uses, and otherwise, initial rights field is also with empty word
Symbol is filled；
File1 is encrypted by B, content server according to the initial right in metadata, is available for user and freely uses or browse
Part do not encrypt, remainder is all encrypted, if initial rights field is sky, encryptions whole to original content file, encryption
The key K usedeWith decruption key KdGenerated by content server temporarily；
Metadata and File1 are packed by the DRM packing device in C, content server, meanwhile, by claim, decruption key
KdSend to authorization server with product information, be stored in the data base of authorization server；
D, content server, by packed protection file, are designated as File2, and carry to the Internet is freely downloaded for user；
The protection product information of file File2, right information and key are sent to authorization server, by it by E, content server
Be stored in data base, for user network checking time；
3. described step is subdivided into following steps:
Local verification starts (301)；
A, DRM controller reads the metadata fields (302) of protection file File2 head；
Whether b, the license field judged in metadata are to there are (303), are then to enter step c, otherwise jump to step g；
License field does not exists, and means that File2 not yet lives through networking and authorizes, otherwise shows that File2 exists license this moment
Card；
C, DRM controller extracts the hardware information of user terminal, and is counted by function KeyGeneration according to hardware information
Calculate the symmetric key K of licences, meanwhile, DRM controller calculates cryptographic Hash H according to hardware information by function ConputeHash
(304)；
D, DRM controller reads license field, and the license information now read is in encrypted state, it is impossible to be directly obtained
The internal information of licence, the most first uses KsThe license field read out is decrypted, obtains the plaintext of licence, then
Whether the mode the most equal with the Hash identifying code in the license field after deciphering by detection cryptographic Hash H judges licence
Legal (305)；
E, judge licence the most legal (306), be then entrance step f, otherwise jump to step g；
Cryptographic Hash H is equal with the Hash identifying code in the license field after deciphering, then show that the licence in File2 is strictly
The legal licence that this user terminal is issued by authorization server by networking checking, otherwise means to protect file File2
Being to copy from other equipment, the licence comprised in it is illegal；
F, DRM controller extracts the initial rights field (307) in protection file File2 metadata, and step is 5. middle can be according to just
The presence or absence of beginning right extracts the initial data in protection file, so far, local verification success, and without carrying out networking checking again
(308), local verification terminates (313)；
G, DRM controller extracts the initial rights field (309) in protection file File2 metadata；
H, judge whether initial right exists (310), be then local verification success, if but user wants to obtain more authority, still
Needs carry out networking checking (311), and local verification terminates (313)；
Otherwise local verification failure, needs to carry out networking checking (312) further, shows that initial right does not exists, the most also table
Show that local verification terminates (313)；
5. described step is subdivided into following steps:
1) local verification and networking checking are after one of them passes through, and DRM controller is according to the request of built-in application program and current
The state of initial right and licence extracts initial data to be had with the possible state of right information, initial right and licence in plain text
Following 3 kinds:
State 1: initial right information does not exists, and licence exists and legal；
State 2: initial right information exists, although licence does not exists or exists but illegal；
State 3: initial right information exists, and licence there is also and legal；
When the state of initial right and licence is state 1: symmetric key K first used by DRM controllersLicence is decrypted,
Obtain the right information in licence and the decruption key K of initial datad, further according to the request key K of built-in application programd
Cipher text part corresponding in initial data is decrypted thus obtains the cleartext information of initial data；
When the state of initial right and licence is state 2: DRM controller extracts initial right information, according to initial right
Information record unencrypted original data region, then according to the request extracting directly unencrypted initial data of built-in application program
In plain text, if the original contents of built-in application PROGRAMMED REQUESTS is beyond the region of record, then refusal provides data and points out user to buy
Corresponding authority；
When the state of initial right and licence is state 3: first DRM controller extracts initial right information, and according to just
Beginning right information record unencrypted original data region, secondly, DRM controller symmetric key KsLicence is solved
Close, obtain the right information in licence and the decruption key K of initial datad, finally, DRM controller is according to built-in application journey
The current desired initial data wanted of sequence judges whether the initial data in this region is in encrypted state, is recorded not if belonging to
The region of encryption, then extracting directly, the most first use key KdRequired original data portion is decrypted what extraction again decrypted
Initial data is in plain text；
2) the initial data plaintext transmission extracted for it and is operated by DRM controller to built-in application program, meanwhile,
Initial data is operated by the right information constraint built-in application program that DRM controller comprises according to initial right and licence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410219153.5A CN103971033B (en) | 2014-05-23 | 2014-05-23 | A kind of digital copyright management method tackling illegal copies |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410219153.5A CN103971033B (en) | 2014-05-23 | 2014-05-23 | A kind of digital copyright management method tackling illegal copies |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103971033A CN103971033A (en) | 2014-08-06 |
| CN103971033B true CN103971033B (en) | 2016-11-02 |
Family
ID=51240521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410219153.5A Expired - Fee Related CN103971033B (en) | 2014-05-23 | 2014-05-23 | A kind of digital copyright management method tackling illegal copies |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103971033B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015209714A1 (en) * | 2015-05-27 | 2016-12-01 | Siemens Aktiengesellschaft | Apparatus and method for adjusting usage of a device |
| CN105704515A (en) * | 2015-06-03 | 2016-06-22 | 深圳Tcl数字技术有限公司 | Fast playback starting method and device of media file |
| CN106713224B (en) * | 2015-11-12 | 2019-12-06 | 福建福昕软件开发股份有限公司 | Document authority control method |
| CN106897584A (en) * | 2015-12-21 | 2017-06-27 | 上海交通大学 | Onboard system digital copyright management method and system based on architectural feature |
| CN109508516A (en) * | 2017-09-15 | 2019-03-22 | 中国移动通信有限公司研究院 | Document handling method, terminal, server and computer readable storage medium |
| CN109284615B (en) * | 2018-08-10 | 2022-01-25 | 广东电网有限责任公司信息中心 | Mobile equipment digital resource safety management method |
| CN109299053B (en) * | 2018-09-04 | 2021-03-02 | 中国联合网络通信集团有限公司 | File operation method, device and computer storage medium |
| WO2020113371A1 (en) * | 2018-12-03 | 2020-06-11 | 刘国斌 | Implementation method of domestic-abroad integrated services |
| CN110704812A (en) * | 2019-09-30 | 2020-01-17 | 展讯半导体(南京)有限公司 | DRM file identification method and device, storage medium and terminal |
| CN111163090A (en) * | 2019-12-30 | 2020-05-15 | 重庆同汇勘测规划有限公司 | Authorization method and system based on server time service equipment |
| CN111464561B (en) * | 2020-04-21 | 2022-01-04 | 南京珥仁科技有限公司 | Data ferry management system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101174295A (en) * | 2008-01-16 | 2008-05-07 | 北京飞天诚信科技有限公司 | Off-line DRM authentication method and system |
| CN101923616A (en) * | 2010-08-03 | 2010-12-22 | 鸿富锦精密工业（深圳）有限公司 | Service provision device in copyright protection, user terminal and copyright protection method |
| CN102024102A (en) * | 2010-06-07 | 2011-04-20 | 无敌科技(西安)有限公司 | Offline DRM certificate management and control method in embedded equipment |
-
2014
- 2014-05-23 CN CN201410219153.5A patent/CN103971033B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101174295A (en) * | 2008-01-16 | 2008-05-07 | 北京飞天诚信科技有限公司 | Off-line DRM authentication method and system |
| CN102024102A (en) * | 2010-06-07 | 2011-04-20 | 无敌科技(西安)有限公司 | Offline DRM certificate management and control method in embedded equipment |
| CN101923616A (en) * | 2010-08-03 | 2010-12-22 | 鸿富锦精密工业（深圳）有限公司 | Service provision device in copyright protection, user terminal and copyright protection method |
Non-Patent Citations (1)
| Title |
|---|
| 数字版权管理DRM协议及应用研究;张俊华;《中国优秀硕士学位论文全文数据库 信息科技辑》;20140315(第03期);第4.3.1节、第4.3.2节，图4-4、图4-6 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103971033A (en) | 2014-08-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103971033B (en) | A kind of digital copyright management method tackling illegal copies | |
| CN103366102B (en) | For content transmission and the system for numeral copyright management of distribution | |
| CN103189872B (en) | Safety in networked environment and the effectively method and apparatus of Content Selection | |
| US7975312B2 (en) | Token passing technique for media playback devices | |
| CN103942470B (en) | A kind of electronic audiovisual product copyright managing method with function of tracing to the source | |
| CN104221023B (en) | Methods, devices and systems for digital rights management | |
| WO2016033365A1 (en) | Distributing protected content | |
| CN102316378B (en) | Digital copyright protection method based on set-top box and system | |
| CN105743903B (en) | Digital audio copyright managing method, intelligent terminal, certificate server and system | |
| JPH1040100A (en) | Method for preparing cipher envelope | |
| CN105893792B (en) | Digital copyright management method, device and system | |
| CN103136459B (en) | A kind of copyright method and system of encrypted digital content | |
| CN109547198A (en) | The method and system of network transmission video file | |
| US20120036349A1 (en) | Datebase server, customer terminal and protection method for digital contents | |
| US20210167955A1 (en) | Data transmission | |
| CN107332666A (en) | Terminal document encryption method | |
| CN107306254B (en) | Digital copyright protection method and system based on double-layer encryption | |
| Hassan et al. | A robust computational DRM framework for protecting multimedia contents using AES and ECC | |
| CN104966000A (en) | Multimedia copyright protection method based on security engine | |
| KR20220039779A (en) | Enhanced security encryption and decryption system | |
| CN111818000B (en) | Block chain-based distributed Digital Rights Management (DRM) system | |
| CN109446752B (en) | Copyright file management method, system, device and storage medium | |
| CN110572454A (en) | Advertisement delivery system for guaranteeing safety of advertisement delivery process | |
| CN107506619B (en) | DRM-Q digital copyright protection method and system | |
| US20100077486A1 (en) | Method and apparatus for digital content management |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20160825 Address after: 430079 Hubei Province, Wuhan city Hongshan District Luoyu Road No. 152 Applicant after: Huazhong Normal University Address before: 430074 Hubei city of Wuhan Province, East Lake New Technology Development Zone, Road No. 1 Optics Valley Software Park 4.1 A1 11 storey building No. 02 Applicant before: Wuhan Hua Yaxingtong Information Technology Co., Ltd |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161102 Termination date: 20170523 |