CN1863045B - Method for receiving and deleting media data key - Google Patents
Method for receiving and deleting media data key Download PDFInfo
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- CN1863045B CN1863045B CN2006100836752A CN200610083675A CN1863045B CN 1863045 B CN1863045 B CN 1863045B CN 2006100836752 A CN2006100836752 A CN 2006100836752A CN 200610083675 A CN200610083675 A CN 200610083675A CN 1863045 B CN1863045 B CN 1863045B
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Abstract
The invention relates to a media data key receiving and deleting method that includes media data supplying system and authorization managing system that connect to the mobile communication terminal by wireless network. The method includes the following steps: the mobile communication terminal sending key request and the information of user card to authorization managing system; the authorization managing system returning the decrypt key to the user card; the mobile communication terminal supplying the media data of each channel after encrypting, after the using time exceeding the set value, deleting the key received. The invention could save request time and decrease the channel switching time.
Description
Technical field
The present invention relates to a kind of reception and delet method of media data key, especially a kind of mobile communication terminal once receives the key of a plurality of media datas, the methods of all deleting when not using arbitrary key above the thresholding time.
Background technology
Along with the continuous development of mobile communication technology and digital television techniques, a kind of technology that mobile communication technology and digital television techniques are merged mutually--mobile TV technology occurred, and progressed into the practical stage in recent years.
A most key problem of mobile TV technology is how to realize how preventing promptly that to user's authentication with to the protection of media data the disabled user from having access to broadcast television content.The method of taking at present generally is at network side media data to be encrypted, send the key of playing media data to the mobile communication terminal that uses the legal users card, mobile communication terminal storage key, mobile communication terminal carry out the deciphering of media data with the key of storage when playing media data.
Utilize this method, usually key can keep for a long time at mobile communication terminal, for example about one month, when the encryption key of media data does not upgrade, mobile communication terminal just can unconfined playing media data, and this method can't realize the pay-per-use of media data; And when the user changed mobile communication terminal, the mobile communication terminal that has key just can be new user's broadcast program, and no matter whether new user has ordered mobile phone TV services; After network side upgrades encryption key in addition,, can cause the deciphering failure, need ask key again, lose time to network if mobile communication terminal is also used original secret key decryption media data; What is more important because the security system ratio of existing mobile communication terminal is easier to be broken, is easy to cause key stolen, makes that key is illegally propagated.
And if a customization program of a plurality of channels, the key of the encrypted media data of these channels is different, when the user need play the program of different channels at every turn, need each key that receives the media data of this channel, the channel that more renews just receives the key of the media data of new channel, the consumption time is long, and is very inconvenient.
Summary of the invention
The objective of the invention is at the reception of existing media data key and the defective of delet method, a kind of reception and delet method of media data key are provided, can receive the decruption key of the media data of all customized channel simultaneously, when mobile communication terminal does not use arbitrary key in threshold time, delete the key that all receive simultaneously.
For achieving the above object, the invention provides a kind of reception and delet method of media data key, comprise that interconnective media data provides system and authentication management system, and all be connected with mobile communication terminal that wherein this method may further comprise the steps by the mobile network:
Step 1, mobile communication terminal send the information of the subscriber card of key request and the use of this mobile communication terminal to authentication management system;
Step 4 when surpass threshold value the not service time of all keys, is deleted the key that all receive;
Step 5 finishes.
Further comprising the steps of between the described step 1 of technique scheme and the step 2: described authentication management system carries out authentication according to the information of this subscriber card, if authentication by execution in step 2, otherwise execution in step 5.
And described step 1 can be specially: mobile communication terminal is to the request of the key of the media data of authentication management system transmission deciphering first channel and the information of the subscriber card that this mobile communication terminal uses.Further comprising the steps of between thus described step 1 and the step 2: described authentication management system is inquired about this subscriber card and whether has been customized this first channel, if execution in step 2 then, otherwise execution in step 5.And can described step 1 and step 2 between further comprising the steps of: step 11, described authentication management system are inquired about this subscriber card and whether have been customized this first channel, if execution in step 2 then, otherwise execution in step 12; Step 12, described authentication management system send the information of this this first channel of subscriber card un-customized to this mobile communication terminal; Step 13, this mobile communication terminal returns the information that customizes this first channel, execution in step 14 to authentication management system; Otherwise execution in step 5; Step 14, this authentication management system customizes this first channel, execution in step 2 with this subscriber card.
In addition, described step 3 is specially: this mobile communication terminal is kept at each key in the subscriber card, this mobile communication terminal utilizes the key of each channel of subscriber card storage, the media data of each channel that the process that deciphering provides system to provide by described media data is encrypted.Described step 4 is specially: when this mobile communication terminal uses secret key decryption in this subscriber card, and timer zero clearing in the subscriber card, if when mobile communication terminal does not use arbitrary key in threshold time, subscriber card is all deleted each key.Subscriber card in the described step is SIM card or usim card.
Therefore, the key of media data of the present invention receives and delet method, when authentication management system is received the request of key of media data of the deciphering channel that mobile communication terminal sends, return the key of all channels of subscriber card customization simultaneously, when in mobile communication terminal is surpassing threshold time, not using arbitrary key, delete the key that all receive simultaneously, the defective of having applied for the key of this channel when having avoided the media data of a channel of each deciphering, saved request time, mobile communication terminal keeps each key simultaneously, when the frequent switching channels of user, can directly obtain decruption key from this locality, saved channel switching time.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Fig. 1 for the reception of media data key of the present invention and delet method based on structural representation.
Fig. 2 is the reception of media data key of the present invention and the flow chart of delet method embodiment 1.
Fig. 3 is the reception of media data key of the present invention and the flow chart of delet method embodiment 2.
Embodiment
The present invention is that mobile communication terminal when using mobile TV at every turn, to communication network authentication management system request key, the communication network authentication management system sends to mobile communication terminal according to subscriber card with the password of all customized channel, when thresholding is not used any secret key decryption media data in the time, delete the key that all receive simultaneously.
As shown in Figure 1, for the reception of media data key of the present invention and delet method based on structural representation, comprise that content provides system 1, be used for media data is encrypted and sent, authentication management system 2, provide system 1 to be connected with content, be used for carrying out the transmission of authentication and key, use the portable terminal 4 of subscriber card 3 to utilize same or different wireless networks and content to provide system 1 to be connected with authentication management system 2 according to the information of subscriber card 3.
The user can utilize the different channel of subscriber card (for example SIM card or usim card) customization, thereby utilize the portable terminal that uses this subscriber card to receive the process encrypted media data of each channel, therefore must use key to be decrypted to adding overstocked media data, as shown in Figure 2, for the reception of media data key of the present invention and the flow chart of delet method embodiment 1, comprise the steps:
Therefore, when please key in the mobile communication terminal that uses subscriber card, authentication management system all sends the key of all channels of this subscriber card customization, surpasses the thresholding time not use arbitrary key, and all keys that receive are all deleted.
As shown in Figure 3, ask the reception of media data key of the present invention and the flow chart of delet method embodiment 2, comprise the steps:
When the reception of media data key of the present invention and delet method use mobile TV at mobile communication terminal at every turn, to communication network authentication management system request key, the communication network authentication management system sends to mobile communication terminal according to subscriber card information with the password of all customized channel, mobile communication terminal is stored in key among SIM or the USIM, mobile communication terminal utilizes the key that stores among SIM or the USIM that the encrypted media data are decrypted, SIM/USIM initiatively deletes business cipher key after customer service finishes, the defective of having applied for the key of this channel when having avoided the media data of a channel of each deciphering, saved request time, mobile communication terminal keeps each key simultaneously, when the frequent switching channels of user, can directly obtain decruption key, save channel switching time from this locality.
It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not break away from the spirit and scope of technical solution of the present invention.
Claims (8)
1. the reception of a media data key and delet method comprise that interconnective media data provides system and authentication management system, and all are connected with mobile communication terminal by the mobile network that wherein this method may further comprise the steps:
Step 1, mobile communication terminal send the information of the subscriber card of key request and the use of this mobile communication terminal to authentication management system;
Step 2, described authentication management system be according to the information of this subscriber card, returns the decruption key separately of media data of each channel of this subscriber card customization to mobile communication terminal;
Step 3, described mobile communication terminal is preserved each key, utilizes each channel decruption key, the media data of each channel that the process that deciphering provides system to provide by described media data is encrypted;
Step 4 when surpass threshold value the not service time of all keys, is deleted the key that all receive;
Step 5 finishes.
2. the reception of media data key according to claim 1 and delet method, further comprising the steps of between wherein said step 1 and the step 2: described authentication management system carries out authentication according to the information of this subscriber card, if authentication is passed through then execution in step 2, otherwise execution in step 5.
3. the reception of media data key according to claim 1 and delet method, wherein said step 1 is specially: mobile communication terminal is to the request of the key of the media data of authentication management system transmission deciphering first channel and the information of the subscriber card that this mobile communication terminal uses.
4. the reception of media data key according to claim 3 and delet method, further comprising the steps of between wherein said step 1 and the step 2: described authentication management system is inquired about this subscriber card and whether has been customized this first channel, if execution in step 2 then, otherwise execution in step 5.
5. the reception of media data key according to claim 3 and delet method, further comprising the steps of between wherein said step 1 and the step 2:
Step 11, described authentication management system are inquired about this subscriber card and whether have been customized this first channel, if execution in step 2 then, otherwise execution in step 12;
Step 12, described authentication management system send the information of this this first channel of subscriber card un-customized to this mobile communication terminal;
Step 13, this mobile communication terminal returns the information that customizes this first channel, execution in step 14 to authentication management system; Otherwise execution in step 5;
Step 14, this authentication management system customizes this first channel, execution in step 2 with this subscriber card.
6. according to the reception and the delet method of claim 1,2,3,4 or 5 described media data key, wherein said step 3 is specially: this mobile communication terminal is kept at each key in the subscriber card, this mobile communication terminal utilizes the key of each channel of subscriber card storage, the media data of each channel that the process that deciphering provides system to provide by described media data is encrypted.
7. the reception of media data key according to claim 6 and delet method, wherein said step 4 is specially: when this mobile communication terminal uses secret key decryption in this subscriber card, timer zero clearing in the subscriber card, if when mobile communication terminal did not use arbitrary key in threshold time, subscriber card was all deleted each key.
8. the reception of media data key according to claim 7 and delet method, the subscriber card in the wherein said step is SIM card or usim card.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100836752A CN1863045B (en) | 2006-06-02 | 2006-06-02 | Method for receiving and deleting media data key |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100836752A CN1863045B (en) | 2006-06-02 | 2006-06-02 | Method for receiving and deleting media data key |
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| Publication Number | Publication Date |
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| CN1863045A CN1863045A (en) | 2006-11-15 |
| CN1863045B true CN1863045B (en) | 2010-09-08 |
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| CN2006100836752A Active CN1863045B (en) | 2006-06-02 | 2006-06-02 | Method for receiving and deleting media data key |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102045160B (en) * | 2009-10-15 | 2013-05-15 | 中国移动通信集团公司 | Method and equipment for updating service key |
| CN104780047A (en) * | 2015-04-03 | 2015-07-15 | 南京邮电大学 | Certificateless verifiable encrypted signature method with forward security |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1483258A (en) * | 2000-11-29 | 2004-03-17 | ̩ | Access control enhancements, network access unit and service provider server for delivery of video and other services |
| CN1574958A (en) * | 2003-06-02 | 2005-02-02 | 株式会社东芝 | Reception management apparatus, broadcasting receiving device, information distributing device, and information distributing method and reception management program |
| KR20050122416A (en) * | 2004-06-24 | 2005-12-29 | 주식회사 대우일렉트로닉스 | Method for forming favorite channels grouped according to category therein and navigating same in a digital tv receiver |
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- 2006-06-02 CN CN2006100836752A patent/CN1863045B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1483258A (en) * | 2000-11-29 | 2004-03-17 | ̩ | Access control enhancements, network access unit and service provider server for delivery of video and other services |
| CN1574958A (en) * | 2003-06-02 | 2005-02-02 | 株式会社东芝 | Reception management apparatus, broadcasting receiving device, information distributing device, and information distributing method and reception management program |
| KR20050122416A (en) * | 2004-06-24 | 2005-12-29 | 주식회사 대우일렉트로닉스 | Method for forming favorite channels grouped according to category therein and navigating same in a digital tv receiver |
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| CN1863045A (en) | 2006-11-15 |
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