CN102842002B - The digital media copyright protection method of intelligent terminal - Google Patents
The digital media copyright protection method of intelligent terminal Download PDFInfo
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- CN102842002B CN102842002B CN201210254350.1A CN201210254350A CN102842002B CN 102842002 B CN102842002 B CN 102842002B CN 201210254350 A CN201210254350 A CN 201210254350A CN 102842002 B CN102842002 B CN 102842002B
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Abstract
The invention discloses a kind of digital media copyright protection method of intelligent terminal; belong to technical field of digital copyright protection; the technical solution used in the present invention is: the encipherment protection strategy arranging ordinary numbers media file; according to described encipherment protection strategy, conservation treatment is carried out to ordinary numbers media file to be protected, the described protected digital media file of user's intelligent terminal application.The present invention is to the content-encrypt of protected digital media file; play this file, authorization data must be downloaded from authorization server, with no authorized data; the digital media file of encryption cannot be play, and effectively can prevent the unauthorized use of protected Digital Media.
Description
Technical field
The present invention relates to digital copyright protection technology, relate to the digital media copyright protection method of intelligent terminal.
Background technology
Along with the development of mobile communication, internet and smart mobile phone, the Digital Media business towards intelligent terminal is also flourish.Downloadable music, Online Music, can foradownloaded video, Online Video, mobile TV, online e-book, and the Digital Medias such as e-book can be downloaded make the life of people more rich and varied.
But what come along with the flourish of mobile digital media business is surges that are pirate or other unauthorized uses, huge economic loss is brought to digital media content provider, also it is made to postpone the issue of fresh content on smart mobile phone, thus limit the development of mobile digital publishing, indirectly have influence on smart phone user.
In addition, mostly the digital publishing of personal computer is in the past with type portable storage medium--as CD--or provide Streaming Media in free mode, and with releasing advertisements to realize profit.But on smart mobile phone, mostly mobile communication carrier is to charge with data traffic, also to pay to adjoint ad content when user does not wish playing digital medium certainly.
Summary of the invention
For the defect existed in prior art, the object of this invention is to provide a kind of digital media copyright protection method of intelligent terminal, for realizing the copyright protection of ordinary numbers media file.
For reaching above object, the technical solution used in the present invention is:
A digital media copyright protection method for intelligent terminal, comprises the following steps:
The encipherment protection strategy of ordinary numbers media file is set, according to described encipherment protection strategy, conservation treatment is carried out to ordinary numbers media file to be protected, the described protected digital media file of user's intelligent terminal application.
The present invention is to the content-encrypt of protected digital media file; play this file, authorization data must be downloaded from authorization server, with no authorized data; the digital media file of encryption cannot be play, and effectively can prevent the unauthorized use of protected Digital Media.
Accompanying drawing explanation
The copyright method flow diagram of the ordinary numbers media file that Fig. 1 provides for the embodiment of the present invention;
Fig. 2 is the method flow diagram in the embodiment of the present invention, ordinary numbers media file being carried out to conservation treatment;
Fig. 3 is the method flow diagram that in the embodiment of the present invention, protected digital media file applied by user's intelligent terminal.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Digital media file refers to the file of storing audio, video.The Preservation tactics of digital media file mainly comprises the use limiting unauthorized media file, prevents the uncontrolled diffusion of media file, the intellecture property of protection media file.
As shown in Figure 1, present embodiments provide a kind of copy-right protection method of ordinary numbers media file, comprise the following steps:
Step 101, the encipherment protection strategy of ordinary numbers media file is set.Encipherment protection strategy comprises the cryptographic algorithm (as AES encryption algorithm, 3DES cryptographic algorithm, RC series of cryptographic algorithm etc.) of employing, key length used, the generating mode (as stochastic generation, user's input are arranged) of key, the basic authority of user (comprise can user play this file, media file can be play number of times, whether support online broadcasting, whether allow client to preserve specific authorisation data and shielded digital media file etc.).
Step 102, generate key according to secret generating mode.Wherein, for the key of user's input, if the key length of input is discontented with afc algorithm key length used, expand to required key length by expansion algorithm, the key character that the key character of expansion inputs from user.
Step 103, the encipherment protection strategy pre-set according to user carry out conservation treatment to ordinary numbers media file to be protected.Detailed process as shown in Figure 2, comprising:
Step 1031, encrypt pending ordinary numbers media file with the encryption key generated and the cryptographic algorithm of selection.
Step 1032, in the ordinary numbers media file encrypted, add file header; the cryptographic hash of cryptographic algorithm used, key length used, encryption key, the proof test value of file part content and file identification etc. are put into file header, forms protected digital media file.Wherein file identification is made up of the cryptographic hash of file name, file part content, can identify this file uniquely.
Step 1033, by formed protected digital media file upload to media file download server, play online for terminal device or download.
Step 1034, by encipherment protection strategy, encrypt key used and file identification is sent to media authorization server; generate generic authorization data by media authorization server, in generic authorization data, comprise the general information such as basic authority of described file identification, encryption key used, user.
The described protected digital media file of step 104, user's intelligent terminal application.As shown in Figure 3, comprising:
Step 1041, request user's intelligent terminal of playing or downloading protected digital media file online will to be downloaded or the link of played file obtains the file identification of this file by clicking, and then uploads user's unique code of this file identification and this user to media authorization server.This unique code can be user ID, local No. MISI, SIM card number etc.
Step 1042, media authorization server revise user to the basic authority (as the number of times that file can be play) of this file according to file identification and unique code, use user's unique code of uploading of intelligent terminal as authorization key, the Partial encryption generic authorization data such as (not encrypt file mark information) generates the specific authorisation data of this intelligent terminal.In this step, media authorization server can also add the authority information of this user for this file in specific authorisation data, comprise number of times that this user plays for the residue of this file (broadcasting time of all include files in the basic authority of this authority information and described user, broadcasting time wherein in basic authority refers to the acquiescence access times of all users for this file, and the access times in authority information are this user extra access times for this file, such special user can obtain more broadcasting time by modes such as the expenses of overpaying).
Step 1043, user's intelligent terminal download protected digital media file from media file download server.This step support is only downloaded while protected media file is also supported to download and is play media file.
Step 1044, when protected digital media file play by user's intelligent terminal, the file identification of this file is obtained from protected data media file head, search the specific authorisation data whether having this file in this locality according to file identification, if had, then the direct specific authorisation data obtaining this file from this locality; If no, then file identification is sent to media authorization server together with the unique code of this terminal, asks the specific authorisation data of this terminal.
The unique code that step 1045, media authorization server are sent according to terminal and file identification obtain the specific authorisation data of this terminal, then these specific authorisation data are issued terminal device.
Step 1046, user's intelligent terminal are after obtaining specific authorisation data from local or media authorization service, in internal memory, decipher this specific authorisation data with the unique code of user, from this authorization data, obtain the encryption key of file to be played, the basic authority of user and/or authority information.If user has the authority storing specific authorisation data in this locality, then the specific authorisation data before deciphering are saved in this locality.
Step 1047, user's intelligent terminal determine whether to play this file according to the basic authority obtained and/or authority information, if this user does not have authority to play, then provide prompting; Play this file if had the right, then dynamically decipher protected digital media file with the encryption key obtained, deciphering limit, limit is play.The data of deciphering only exist in internal memory, External memory equipment are not deposited, empty the data of deciphering after broadcasting.In this step; protected digital media file is play if online; then user's intelligent terminal determines whether to preserve this file in this locality according to the basic authority of user; if need to preserve this file; then before data decryption; first cushion in the encrypt data of protected digital media file write local file, no longer to need again to download protected digital media file from media file download server when user plays next time.
The major advantage of said method is:
1, the unauthorized use of protected Digital Media can effectively be prevented.Content due to protected digital media file is encryption, and play this file, must download authorization data from authorization server, with no authorized data, the digital media file of encryption cannot be play.
2, the diffusion of the improper approach of protected Digital Media can effectively be prevented.Because the authorization data of each equipment and the unique code of user pass through crypto-binding; the protected digital media file that device A is downloaded can only be play in device A; if the protected digital media file downloaded is sent to equipment B by bluetooth etc. by user; then equipment B cannot be play; even if because equipment B can obtain the authorization data of device A; because the unique code of equipment B is different from device A, therefore equipment B cannot decrypt authorisation data, also just cannot play shielded digital media file.
3, fine granularity control can be carried out to protected media file.As controlled the number of times of user's broadcasting, the time etc. of broadcasting.
4, can know that user plays the information such as time, frequency of protected digital media file, contribute to understanding user to the service condition of digital media file.Owing to playing shielded Digital Media at every turn; generally all need to obtain authorization data from authorization server (relevant with security strategy; also authorization data can be cushioned at user terminal according to security strategy; do not need all to obtain from authorization server at every turn), therefore authorization server can know when user plays this shielded digital media file.
Method and system of the present invention is not limited to the embodiment described in embodiment, and those skilled in the art's technical scheme according to the present invention draws and other embodiment belongs to technological innovation scope of the present invention equally.
Claims (8)
1. a digital media copyright protection method for intelligent terminal, is characterized in that, comprises the following steps:
The encipherment protection strategy of ordinary numbers media file is set, according to described encipherment protection strategy, conservation treatment is carried out to ordinary numbers media file to be protected, form protected digital media file, the described protected digital media file of user's intelligent terminal application; Describedly conservation treatment carried out to ordinary numbers media file to be protected specifically comprise:
Pending ordinary numbers media file is encrypted by the cryptographic algorithm of key and employing;
In the ordinary numbers media file encrypted, add file header, form protected digital media file; Described file header comprises: the cryptographic hash of the cryptographic algorithm of employing, key length used, key, the proof test value of file part content and file identification;
Described protected digital media file is uploaded to media file download server;
By described encipherment protection strategy, encrypt key used and file identification is sent to media authorization server, generate generic authorization data by media authorization server, comprise described file identification in generic authorization data, encrypt the basic authority of key used and user;
The protected digital media file of described application specifically comprises:
Request user's intelligent terminal of playing or downloading described protected digital media file online will to be downloaded or the link of played file obtains the file identification of this file by clicking, and uploads user's unique code of this file identification and this user to media authorization server;
Media authorization server revises user to the basic authority of this file according to described file identification and user's unique code, and use user's unique code as authorization key, Partial encryption generic authorization data generates the specific authorisation data of this user's intelligent terminal;
User's intelligent terminal downloads described protected digital media file from media file download server;
When protected digital media file play by user's intelligent terminal, specific authorisation data are obtained from media authorization server, in internal memory, decipher this specific authorisation data with described user's unique code, obtain the encryption key of protected digital media file and the basic authority of user; If user has the authority of preserving specific authorisation data in this locality, then the specific authorisation data before deciphering are saved in this locality;
User's intelligent terminal determines whether to play this file according to described basic authority, if having the right to play this file, then dynamically deciphers protected digital media file with the encryption key obtained, and deciphering limit, limit is play; Otherwise do not play this file, and provide prompting; The data of deciphering only exist in internal memory, External memory equipment are not deposited, empty the data of deciphering after broadcasting.
2. the digital media copyright protection method of intelligent terminal according to claim 1, is characterized in that, described encipherment protection strategy specifically comprises:
The cryptographic algorithm adopted, key length used, the generating mode of key and the basic authority of user.
3. the digital media copyright protection method of intelligent terminal according to claim 2; it is characterized in that; the generating mode of described key comprises stochastic generation or user inputs setting, and whether the basic authority of user comprises can user play this file, media file can be play number of times, whether supports online broadcasting, allows user's intelligent terminal to preserve specific authorisation data and shielded digital media file.
4. the digital media copyright protection method of intelligent terminal according to claim 3, is characterized in that, described encipherment protection strategy is set after, also comprise further:
Generating mode according to key generates key, when described generating mode is arranged for user's input, for the key of user's input, if when the key length of described input is less than described key length used, then by expansion algorithm, the key length of described input is expanded to key length used, the key character that the key character of expansion inputs from user.
5. the digital media copyright protection method of intelligent terminal according to claim 1, is characterized in that, described file identification is made up of the cryptographic hash of file name and file part content, can identify this file uniquely.
6. the digital media copyright protection method of intelligent terminal according to claim 1, is characterized in that, describedly obtains specific authorisation data from local or media authorization server and specifically comprises:
User's intelligent terminal obtains the file identification of this file from file header, searches the specific authorisation data of this file according to file identification in this locality, if had, then directly obtains described specific authorisation data from this locality; Otherwise described file identification is sent to media authorization server together with user's unique code, request specific authorisation data;
Media authorization server obtains specific authorisation data according to described user's unique code and file identification, and issues user's intelligent terminal.
7. the digital media copyright protection method of intelligent terminal according to claim 1, is characterized in that, also comprises further when described media authorization server generates specific authorisation data:
Media authorization server can also add the authority information of this user for this file in specific authorisation data, comprises the number of times of this user for the extra residue broadcasting of this file.
8. the digital media copyright protection method of intelligent terminal according to claim 7, is characterized in that, the method comprises further:
Protected digital media file is play if online; then user's intelligent terminal determines whether to preserve this file in this locality according to the basic authority of user; if need to preserve, then before data decryption, first cushion in the encrypt data of protected digital media file write local file.
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| CN201210254350.1A CN102842002B (en) | 2012-07-20 | 2012-07-20 | The digital media copyright protection method of intelligent terminal |
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| CN201210254350.1A CN102842002B (en) | 2012-07-20 | 2012-07-20 | The digital media copyright protection method of intelligent terminal |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104079532A (en) * | 2013-03-26 | 2014-10-01 | 腾讯科技（深圳）有限公司 | Online reading method and system, client and server |
| CN104239752A (en) * | 2013-06-09 | 2014-12-24 | 腾讯科技（深圳）有限公司 | Method and apparatus for protecting private information during using of browser |
| CN106469281B (en) * | 2015-08-18 | 2020-01-17 | 华为技术有限公司 | Management method of data files in cloud, cloud management point and system |
| CN112804563B (en) * | 2019-11-13 | 2022-11-04 | 腾讯科技（深圳）有限公司 | Media file playing method and device and storage medium |
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| CN101013460A (en) * | 2007-02-15 | 2007-08-08 | 北京中星微电子有限公司 | Digital copyright managerial approach and content server and media player |
| CN101282326A (en) * | 2007-04-04 | 2008-10-08 | 朱明程 | Method, system and hand-hold terminal fro management of digital copyright of binding terminal |
| CN102118391A (en) * | 2011-01-17 | 2011-07-06 | 李岩 | Multimedia file structure and device for providing copyright protection for digital publishing |
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| CN101013460A (en) * | 2007-02-15 | 2007-08-08 | 北京中星微电子有限公司 | Digital copyright managerial approach and content server and media player |
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