CN102842002A - Digital media copyright protection method of intelligent terminal - Google Patents

Digital media copyright protection method of intelligent terminal Download PDF

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Publication number
CN102842002A
CN102842002A CN2012102543501A CN201210254350A CN102842002A CN 102842002 A CN102842002 A CN 102842002A CN 2012102543501 A CN2012102543501 A CN 2012102543501A CN 201210254350 A CN201210254350 A CN 201210254350A CN 102842002 A CN102842002 A CN 102842002A
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user
file
digital media
intelligent terminal
media file
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CN2012102543501A
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CN102842002B (en
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阮晓迅
梁金千
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BEIJING ESAFENT TECHNOLOGY DEVELOPMENT Co Ltd
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BEIJING ESAFENT TECHNOLOGY DEVELOPMENT Co Ltd
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Abstract

The invention discloses a digital media copyright protection method of an intelligent terminal, belonging to the field of digital copyright protection technology. The technical scheme is that the method comprises the following steps: setting an encrypting protection strategy of a common digital media file; protecting the common digital media file to be protected based on the encrypting protection strategy; and applying the protected digital media file through an user intelligent terminal. According to the method, the content of the protected digital media file is encrypted; if the file is to be played, the copyright data must be loaded from a copyright server; the encrypted digital media file cannot be played without the authorized data; and the protected digital media can be effectively prevented from being used without authorization.

Description

The Digital Media copy-right protection method of intelligent terminal
Technical field
The present invention relates to digital copyright protection technology, relate to the Digital Media copy-right protection method of intelligent terminal.
Background technology
Along with the development of mobile communication, internet and smart mobile phone, also flourish towards the Digital Media business of intelligent terminal.But downloadable music, Online Music foradownloaded video, Online Video, mobile TV, online e-book, and can download Digital Medias such as e-book and make that people's life is more rich and varied.
But be accompanied by the flourish of mobile digital media business and what come is the surge of pirate or other unauthorized uses; Brought enormous economic loss for digital media content provider; Also make it postpone the issue of fresh content on smart mobile phone; Thereby limited the development of mobile digital publishing, indirect had influence on the smart mobile phone user.
In addition, mostly the digital publishing of personal computer in the past is with type portable storage medium perhaps with free mode Streaming Media to be provided--like CD--, and follows releasing advertisements to realize profit.But on smart mobile phone, mostly mobile communication carrier is to charge with data traffic, also will not pay to the ad content of following when the user does not hope playing digital medium certainly.
Summary of the invention
To the defective that exists in the prior art, the purpose of this invention is to provide a kind of Digital Media copy-right protection method of intelligent terminal, be used to realize the copyright protection of ordinary numbers media file.
For reaching above purpose, the technical scheme that the present invention adopts is:
A kind of Digital Media copy-right protection method of intelligent terminal may further comprise the steps:
The encipherment protection strategy of ordinary numbers media file is set, according to said encipherment protection strategy ordinary numbers media file to be protected is protected processing, user's intelligent terminal is used said protected digital media file.
The present invention is to the content-encrypt of protected digital media file; Play this document, must download authorization data, do not have authorization data from authorization server; The encrypted digital media file can't be play, and can prevent the unauthorized use of protected Digital Media effectively.
Description of drawings
The copyright method flow diagram of the ordinary numbers media file that Fig. 1 provides for the embodiment of the invention;
Fig. 2 is for protecting the method flow diagram of processing in the embodiment of the invention to the ordinary numbers media file;
Fig. 3 uses the method flow diagram of protected digital media file for user's intelligent terminal in the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further described.
Digital media file is meant the file of storing audio, video.The protection strategy of digital media file mainly comprises the use that limits unauthorized media file, prevents the uncontrolled diffusion of media file, the intellecture property of protection media file.
As shown in Figure 1, present embodiment provides a kind of copy-right protection method of ordinary numbers media file, may further comprise the steps:
Step 101, the encipherment protection strategy of ordinary numbers media file is set.The encipherment protection strategy comprises the generating mode (as generating at random, user's input is provided with etc.) of the AES (like AES AES, 3DES AES, RC series AES etc.) of employing, used key length, key, user's basic authority (comprise number of times that can the user play this document, media file and can play, whether support online playing, whether allow client storage specific authorisation data and shielded digital media file etc.).
Step 102, generate key according to the key generating mode.Wherein, for the key of user's input, if the discontented used key length of afc algorithm of the key length of input expands to required key length through expansion algorithm, the key character of expansion is from the key character of user's input.
Step 103, the encipherment protection strategy that is provided with in advance according to the user are protected processing to ordinary numbers media file to be protected.Detailed process is as shown in Figure 2, comprising:
The AES of step 1031, the encryption key of using generation and selection is encrypted pending ordinary numbers media file.
Step 1032, in the ordinary numbers media file of having encrypted, add file header; The proof test value of the cryptographic hash of used AES, used key length, encryption key, file part content and file identification etc. are put into file header, form protected digital media file.Wherein file identification is made up of the cryptographic hash of file name, file part content, can identify this document uniquely.
Step 1033, the protected digital media file that will form upload to the media file download server, for terminal device online playing or download.
Step 1034, with the encipherment protection strategy, encrypt used key and file identification and send to the media authorization server; Generate generic authorization data by the media authorization server, comprise said file identification, used encryption key, user's general informations such as basic authority in the generic authorization data.
Step 104, user's intelligent terminal are used said protected digital media file.As shown in Figure 3, comprising:
Step 1041, user's intelligent terminal of asking online playing or downloading protected digital media file will be downloaded or the link of played file obtains the file identification of this document through clicking, and upload user's unique code of this document sign and this user then to the media authorization server.This unique code can be ID, local MISI number, SIM number etc.
Step 1042, media authorization server are revised the user to the basic authority of this document (number of times that can play like file) according to file identification and unique code; Use user's unique code that intelligent terminal uploads as authorization key, part is encrypted generic authorization data such as (not encrypt file sign information) and is generated the specific authorisation data of this intelligent terminal.In this step; The media authorization server can also add the authority information of this user to this document in the specific authorisation data; Comprise the number of times that this user plays to the residue of this document (broadcasting time of include file all in this authority information and said user's the basic authority; Broadcasting time in the wherein basic authority is meant the acquiescence access times of all users to this document; And the access times in the authority information are this user extra access times to this document, and the special user can obtain more broadcasting time through modes such as the expenses of overpaying like this).
Step 1043, user's intelligent terminal are from the protected digital media file of media file download downloaded.Playing media file when this step support is only downloaded the protected media file and also supported to download.
Step 1044, when user's intelligent terminal is play protected digital media file; From protected data media file head, obtain the file identification of this document; Search the specific authorisation data that whether have this document in this locality according to file identification; If have, then directly obtain the specific authorisation data of this document from this locality; If no, then the unique code with file identification and this terminal sends to the media authorization server together, asks the specific authorisation data at this terminal.
The specific authorisation data that unique code that step 1045, media authorization server are sent according to the terminal and file identification obtain this terminal are issued terminal device with these specific authorisation data then.
Step 1046, user's intelligent terminal are after obtaining the specific authorisation data from this locality or media authorization service; In internal memory,, from this authorization data, obtain the encryption key of treating played file, user's basic authority and/or authority information with these specific authorisation data of unique code deciphering of user.If the user has the authority of the storage specific authorisation data in this locality, the specific authorisation data before then will deciphering are saved in this locality.
Step 1047, user's intelligent terminal determine whether to play this document according to the basic authority and/or the authority information that obtain, if this user does not have authority to play, then provide prompting; Play this document if having the right, then dynamically decipher protected digital media file, play while deciphering with the encryption key that obtains.Decrypted data only exists in internal memory, does not externally deposit on the memory device, after broadcast, empties decrypted data.In this step; If the protected digital media file of online playing; Then user's intelligent terminal determines whether to preserve this document in this locality according to user's basic authority, preserves this document if desired, then before data decryption; The user earlier the encrypt data of protected digital media file write in the local file and cushions, so that no longer need download protected digital media file when playing next time again from the media file download server.
The major advantage of said method is:
1, can prevent the unauthorized use of protected Digital Media effectively.Because the content of protected digital media file is encrypted, and play this document, must download authorization data from authorization server, does not have authorization data, the encrypted digital media file can't be play.
2, can prevent the diffusion of the improper approach of protected Digital Media effectively.Because the authorization data of each equipment and user's unique code pass through crypto-binding; The protected digital media file that device A is downloaded can only be play on device A, if the protected digital media file that the user will download sends to equipment B through bluetooth etc., then equipment B can't be play; Because even equipment B can access the authorization data of device A; Because the unique code of equipment B is different with device A, so equipment B can't the decrypt authorized data, also just can't play shielded digital media file.
3, can carry out fine granularity control to the protected media file.As control the number of times that the user plays, the time of broadcast etc.
4, can know that the user plays information such as the time of protected digital media file, frequency, helps to understand the operating position of user to digital media file.Because the shielded Digital Media of each broadcast; It is (relevant with security strategy generally all need to obtain authorization data from authorization server; Also can cushion authorization data according to security strategy at user terminal; Do not need all to obtain from authorization server at every turn), so authorization server can know when the user plays this shielded digital media file.
Method and system of the present invention is not limited to the embodiment described in the embodiment, and those skilled in the art's technical scheme according to the present invention draws other embodiment, belongs to technological innovation scope of the present invention equally.

Claims (10)

1. the Digital Media copy-right protection method of an intelligent terminal is characterized in that, may further comprise the steps:
The encipherment protection strategy of ordinary numbers media file is set, according to said encipherment protection strategy ordinary numbers media file to be protected is protected processing, user's intelligent terminal is used said protected digital media file.
2. the Digital Media copy-right protection method of intelligent terminal according to claim 1 is characterized in that, said encipherment protection strategy specifically comprises:
The AES, used key length, the generating mode of key and user's the basic authority that adopt.
3. the Digital Media copy-right protection method of intelligent terminal according to claim 2; It is characterized in that; The generating mode of said key comprises at random and to generate or the user imports setting, and whether user's basic authority comprises number of times that can the user play this document, media file and can play, whether supports online playing, allows user's intelligent terminal to preserve specific authorisation data and shielded digital media file.
4. the Digital Media copy-right protection method of intelligent terminal according to claim 3 is characterized in that, said the encipherment protection strategy is set after, also further comprise:
Generating mode according to key generates key; When said generating mode is provided with for user's input; Key for user's input; If the key length of said input is during less than said used key length, then the key length of said input is expanded to used key length through expansion algorithm, the key character of expansion is from the key character of user's input.
5. the Digital Media copy-right protection method of intelligent terminal according to claim 4 is characterized in that, saidly protects processing specifically to comprise to ordinary numbers media file to be protected:
Encrypt pending ordinary numbers media file with the key of said generation and the AES of employing;
In the ordinary numbers media file of having encrypted, add file header, form protected digital media file; Comprise in the said file header: the cryptographic hash of the AES of employing, used key length, key, the proof test value and the file identification of file part content;
Said protected digital media file is uploaded to the media file download server;
Said encipherment protection strategy, used key and the file identification of encryption are sent to the media authorization server; Generate generic authorization data by the media authorization server, comprise said file identification in the generic authorization data, encrypt used key and user's basic authority.
6. the Digital Media copy-right protection method of intelligent terminal according to claim 5 is characterized in that, said file identification is made up of the cryptographic hash of file name and file part content, can identify this document uniquely.
7. according to the Digital Media copy-right protection method of claim 5 or 6 described intelligent terminals, it is characterized in that the protected digital media file of said application specifically comprises:
Request online playing or user's intelligent terminal of downloading said protected digital media file will be downloaded or the link of played file obtains the file identification of this document through clicking, and upload user's unique code of this document sign and this user to the media authorization server;
The media authorization server is revised the basic authority of user to this document according to said file identification and user's unique code, uses user's unique code as authorization key, and part is encrypted the specific authorisation data that generic authorization data generates this user's intelligent terminal;
User's intelligent terminal is from the said protected digital media file of media file download downloaded;
When user's intelligent terminal is play protected digital media file; From this locality or the media authorization server obtain the specific authorisation data; In internal memory,, obtain the encryption key of protected digital media file and user's basic authority with said these specific authorisation data of user's unique code deciphering; If the user has the authority of preserving the specific authorisation data in this locality, the specific authorisation data before then will deciphering are saved in this locality;
User's intelligent terminal determines whether to play this document according to said basic authority, if having the right to play this document, then dynamically deciphers protected digital media file with the encryption key that obtains, and plays while deciphering; Otherwise do not play this document, and provide prompting; Decrypted data only exists in internal memory, does not externally deposit on the memory device, after broadcast, empties decrypted data.
8. the Digital Media copy-right protection method of intelligent terminal according to claim 7 is characterized in that, said from this locality or the media authorization server obtain the specific authorisation data and specifically comprise:
User's intelligent terminal obtains the file identification of this document from file header, according to file identification is searched this document in this locality specific authorisation data, if having, then directly obtain said specific authorisation data from this locality; Otherwise said file identification and user's unique code are sent to the media authorization server together, request specific authorisation data;
The media authorization server obtains the specific authorisation data according to said user's unique code and file identification, and issues user's intelligent terminal.
9. the Digital Media copy-right protection method of intelligent terminal according to claim 7 is characterized in that, said media authorization server also further comprises when generating the specific authorisation data:
The media authorization server can also add the authority information of this user to this document in the specific authorisation data, comprise the number of times that this user plays to the extra residue of this document.
10. the Digital Media copy-right protection method of intelligent terminal according to claim 9 is characterized in that, this method further comprises:
If the protected digital media file of online playing; Then user's intelligent terminal determines whether preservation this document in this locality according to user's basic authority; Preserve if desired, then before data decryption, first encrypt data with protected digital media file writes in the local file and cushions.
CN201210254350.1A 2012-07-20 2012-07-20 The digital media copyright protection method of intelligent terminal Active CN102842002B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN106469281A (en) * 2015-08-18 2017-03-01 华为技术有限公司 The management method of data file, cloud management point and system in a kind of cloud
CN112804563A (en) * 2019-11-13 2021-05-14 腾讯科技（深圳）有限公司 Media file playing method and device and storage medium

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN106469281A (en) * 2015-08-18 2017-03-01 华为技术有限公司 The management method of data file, cloud management point and system in a kind of cloud
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
CN112804563A (en) * 2019-11-13 2021-05-14 腾讯科技（深圳）有限公司 Media file playing method and device and storage medium

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