CN101888628B - Mobile multimedia broadcasting system and encryption method employed by same - Google Patents
Mobile multimedia broadcasting system and encryption method employed by same Download PDFInfo
- Publication number
- CN101888628B CN101888628B CN200910107364.9A CN200910107364A CN101888628B CN 101888628 B CN101888628 B CN 101888628B CN 200910107364 A CN200910107364 A CN 200910107364A CN 101888628 B CN101888628 B CN 101888628B
- Authority
- CN
- China
- Prior art keywords
- key
- mobile multimedia
- multimedia broadcasting
- terminal
- business cipher
- 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.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
- H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
- H04L9/0819—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s)
- H04L9/0822—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s) using key encryption key
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/04—Key management, e.g. using generic bootstrapping architecture [GBA]
- H04W12/041—Key generation or derivation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
- H04L2209/80—Wireless
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2463/00—Additional details relating to network architectures or network communication protocols for network security covered by H04L63/00
- H04L2463/062—Additional details relating to network architectures or network communication protocols for network security covered by H04L63/00 applying encryption of the keys
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
Landscapes
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Telephonic Communication Services (AREA)
Abstract
The invention discloses a system and a method for encrypting a service key by using a user key when a user terminal is roaming in a mobile multimedia broadcasting service system. The method comprises the following steps of: a mobile multimedia broadcasting service platform of a terminal visit area requests an encryption service key from a mobile multimedia broadcasting service platform of a terminal attaching area; after detecting the service key according to the encryption service key request, the mobile multimedia broadcasting service platform of the terminal attaching area encrypts the service key by using a corresponding user key; and the mobile multimedia broadcasting service platform of the terminal attaching area sends the encrypted service key to the mobile multimedia broadcasting service platform of the terminal visit area. The method avoids information leakage risks caused by transmitting the user key to a mobile multimedia broadcasting service platform beyond the attaching area.
Description
Technical field
The present invention relates to mobile multimedia broadcasting service system, relate in particular to the encryption method of mobile multimedia broadcast system and use thereof, specifically, the present invention relates in mobile multimedia broadcasting service system the method and apparatus of user's secret key encryption business cipher key when user roams.
Background technology
Fig. 1 shows a kind of system configuration of mobile multimedia broadcast system.The dependency structure of system while for convenience of description, only showing terminal roaming here.This system comprises China Mobile multimedia broadcasting network business platform (China Mobile Multimedia Broadcasting, hereinafter to be referred as CMMB) and mobile communication network service platform; Mobile multimedia broadcast system can be to only include CMMB network business platform.
CMMB network business platform comprises: the mobile multimedia broadcasting service platform that each province has, as Mobile Multimedia Broadcasting user roaming place province mobile multimedia broadcasting service platform (B in Fig. 1 economizes Mobile Multimedia Broadcasting platform), Mobile Multimedia Broadcasting user attaching are economized mobile multimedia broadcasting service platform (A in Fig. 1 economizes Mobile Multimedia Broadcasting platform) etc.; Economize business platform and can comprise that districts and cities' platform is some, as B in Fig. 1 economizes, have 2, districts and cities' Mobile Multimedia Broadcasting platform; Whole nation Mobile Multimedia Broadcasting platform.Terminal seat B economizes Mobile Multimedia Broadcasting platform and each Mobile Multimedia Broadcasting platform, by interfaces such as business cipher key sync cap, business cipher key encipher interfaces, contacts.
Mobile communication network service platform comprises: each province's mobile communication network service platform, B province mobile communication platform is province's mobile communication service platform of mobile subscriber roaming place as shown in Figure 1.Mobile communication network service platform can be Co., Ltd of China Mobile, can be also mobile network's business platform of other mobile operator.
Mobile Multimedia Broadcasting platform can be managed program by oneself, also can relay prefectures and cities, he economizes, the program of national platform.Therefore, the business cipher key of visited place Mobile Multimedia Broadcasting platform, can derive from this locality, jurisdiction districts and cities, he economizes, national platform.
After producing, the condition receiving system (Conditional Access System, hereinafter to be referred as CAS) of business cipher key by program source place mobile multimedia broadcasting service platform be issued to terminal.At the mobile multimedia broadcast system of the CMMB shown in Fig. 1 and mobile communication network fusion, business cipher key need to be handed down to terminal by Mobile Multimedia Broadcasting visited place province's platform and mobile network visited place province platform.
When terminal use uses ciphered program, terminal need to obtain business cipher key from network side.Due to the needs of fail safe, this business cipher key is issued to before terminal at Mobile Multimedia Broadcasting visited place province platform, need to use the user key secure service key of Mobile Multimedia Broadcasting.
But, the user profile such as user key are kept at the Mobile Multimedia Broadcasting of user ascription area and economize platform, send user key information to other system, the Mobile Multimedia Broadcasting that sends this ownership to is economized visited place system outside platform and is carried out business cipher key while encrypting, and easily causes the leakage of user profile and threatens user's information security.
Summary of the invention
The object of the present invention is to provide the encryption method of a kind of mobile multimedia broadcast system and use thereof, be intended to solve under prior art, in mobile multimedia broadcast system, easily reveal the problem of user profile during secure service key.
The present invention is achieved in that a kind of encryption method of mobile multimedia broadcast system, and described method comprises: the mobile multimedia broadcasting service platform of terminal visited place is to the mobile multimedia broadcasting service platform request secure service key on terminal attaching ground;
The mobile multimedia broadcasting service platform on terminal attaching ground after business cipher key being detected, is used respective user key to be encrypted business cipher key according to secure service key request;
The mobile multimedia broadcasting service platform on terminal attaching ground sends to the business cipher key after encrypting the mobile multimedia broadcasting service platform of terminal visited place.
Another object of the present invention is to provide a kind of mobile multimedia broadcast system, the device of user's secret key encryption business cipher key when user terminal is roamed, described device comprises:
Encrypt request unit, the mobile multimedia broadcasting service platform request secure service key for the mobile multimedia broadcasting service platform from terminal visited place to terminal attaching ground;
Business cipher key ciphering unit, is detecting after business cipher key according to secure service key request for the mobile multimedia broadcasting service platform on terminal attaching ground, uses respective user key to be encrypted business cipher key;
Business cipher key returns to unit, for the mobile multimedia broadcasting service platform from terminal attaching ground, the business cipher key encrypting is sent to the mobile multimedia broadcasting service platform of terminal visited place.
The invention has the beneficial effects as follows: use the present invention to realize the encryption to business cipher key, can avoid user key to pass to the mobile multimedia broadcasting service platform beyond ownership place and the leakage of information risk that causes.
Accompanying drawing explanation
Fig. 1 is the structure chart of the mobile multimedia broadcast system that provides of prior art;
Fig. 2 is the flow chart of steps of user's secret key encryption business cipher key during terminal roaming in the mobile multimedia broadcasting service system that provides of the embodiment of the present invention;
Fig. 3 is that a kind of program source that the embodiment of the present invention provides is the process chart of ownership place mobile multimedia broadcasting service platform secure service key while producing;
Fig. 4 is the another kind of business cipher key encryption flow chart that the embodiment of the present invention provides;
Fig. 5 is the structure drawing of device of a kind of secure service key of providing of the embodiment of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
In embodiments of the present invention, economize business platform carry out user key secure service key by the Mobile Multimedia Broadcasting by user ascription area, the business platform of then business cipher key after encrypting being passed to visited place is used.Thereby the leakage of information risk of having avoided user key to pass to the mobile multimedia broadcasting service platform beyond ownership place and having caused.
Mobile multimedia broadcast system can include CMMB network business platform, mobile communication network service platform and for user's terminal.In mobile multimedia broadcast system, each several part function related to the present invention is as described below:
CMMB network business platform comprises the whole nation, each province, districts and cities' business platform.CAS in platform (Conditional Access System, condition receiving system) can produce business cipher key, receives synchronous business cipher key and preserve business cipher key; To relaying platform synchronized transmission business cipher key; Receive the business cipher key request of mobile communication network service platform, and return to business cipher key; From visited place province platform to ownership, economizing platform request business cipher key encrypts; From visited place province platform to being relayed ground platform requested service key.
Mobile communication network service platform: can send and upgrade business cipher key indication to terminal, initiate more new technological process of business cipher key with triggering terminal; Can the program source place mobile multimedia broadcasting service platform from CMMB network business platform obtain business cipher key; Receiving terminal business cipher key obtains request, and returns to corresponding business cipher key information;
Business cipher key: produced by the on-site mobile multimedia broadcasting service platform of program source.
Terminal: can, to CMMB network business platform or mobile communication network service platform acquisition request business cipher key, receive and use business cipher key.Terminal is mainly divided into unidirectional terminal and two kinds of forms of bidirectional terminal.Unidirectional terminal is can only receive mobile multimedia broadcast television business and the receiving terminal that do not possess uplink passage, mainly comprises PDA (Personal Digital Assistant, personal digital assistant), MP3, MP4 and digital camera etc.; Bidirectional terminal is except can receive mobile multimedia broadcast television business, possess the receiving terminal of uplink passage, mainly comprise mobile phone, notebook computer etc. simultaneously.
When Mobile Multimedia Broadcasting platform in visited place is economized platform and is initiated the initiation of secure service key request and comprise the effective business cipher key of terminal request opportunity to ownership place Mobile Multimedia Broadcasting in the present invention; And business cipher key is when upgrading and need to send to terminal.
During the effective business cipher key of terminal request, refer to bidirectional terminal to need business cipher key and initiatively initiate the effective business cipher key of request or indicate according to visited place Mobile Multimedia Broadcasting platform to initiate the effective business cipher key of request, or other any reason makes the effective business cipher key of bidirectional terminal request; Business cipher key sends and upgrades business cipher key indication to relevant Mobile Multimedia Broadcasting platform after referring to when upgrading and need to send to terminal that the Mobile Multimedia Broadcasting platform of program source has carried out upgrading to the business cipher key of program.Can suppose that in embodiments of the present invention terminal is unidirectional terminal, now this unidirectional terminal visited place Mobile Multimedia Broadcasting platform needs initiatively the business cipher key of renewal to be sent to unidirectional terminal.Those skilled in the art will appreciate that and visited place Mobile Multimedia Broadcasting platform can be set when terminal is bidirectional terminal, also need initiatively the business cipher key of renewal to be sent to terminal.
The steps flow chart of user's secret key encryption business cipher key when Fig. 2 shows terminal roaming in the mobile multimedia broadcasting service system that the embodiment of the present invention provides.For convenience of description, only show part related to the present invention here:
In step S201: terminal visited place Mobile Multimedia Broadcasting platform is to terminal attaching ground Mobile Multimedia Broadcasting platform request secure service key;
The information that visited place Mobile Multimedia Broadcasting platform is economized platform request secure service key to ownership place Mobile Multimedia Broadcasting comprises user ID, such as subscriber phone number etc.
In step S202: ownership place Mobile Multimedia Broadcasting detection of platform, after business cipher key, is used respective user secret key encryption business cipher key;
The user ID that ownership place Mobile Multimedia Broadcasting platform provides according to step S201, the user key in its corresponding user profile of choice for use is encrypted business cipher key.
In step S203: ownership place Mobile Multimedia Broadcasting platform returns to the business cipher key after encryption to visited place Mobile Multimedia Broadcasting platform;
Business cipher key after the encryption that visited place Mobile Multimedia Broadcasting province platform obtains, can be corresponding with above-mentioned user ID.So just completed the encryption to business cipher key.
The handling process of secure service key when a kind of program source that Fig. 3 shows the embodiment of the present invention to be provided is ownership place mobile multimedia broadcasting service platform.Comprise the steps:
In step S301: visited place Mobile Multimedia Broadcasting platform request business cipher key is asked secure service key simultaneously;
Because program source is the Mobile Multimedia Broadcasting platform on terminal attaching ground, thus when visited place Mobile Multimedia Broadcasting platform to terminal attaching during Mobile Multimedia Broadcasting platform request business cipher key, can ask this business cipher key to be encrypted simultaneously.
Request message has comprised the fields such as user ID (for example, subscriber phone number).
In step S302: ownership place mobile multimedia broadcasting service platform produces and secure service key;
Ownership place Mobile Multimedia Broadcasting is economized platform and is produced business cipher key, the user ID providing according to step 301, user key in its corresponding user profile of choice for use, is used cryptographic algorithm, and business cipher key corresponding to program directly himself being produced is encrypted.
In step S303: secure service key also returns.
Ownership place Mobile Multimedia Broadcasting is economized platform and is provided response to visited place Mobile Multimedia Broadcasting platform, comprises the business cipher key after encryption.
Like this, in visited place, mobile multimedia broadcasting service platform requested service key is asked secure service key simultaneously, and ownership place mobile multimedia broadcasting service platform is directly encrypted after producing business cipher key, can accelerate to realize like this encryption of business cipher key.
Fig. 4 shows the another kind of business cipher key encryption flow process that the embodiment of the present invention provides, and comprises the steps:
In step S401: visited place Mobile Multimedia Broadcasting platform is to ownership place Mobile Multimedia Broadcasting platform request secure service key;
In the present embodiment, the CAS by visited place Mobile Multimedia Broadcasting platform sends this secure service key request to ownership place broadcasting and TV platform; In the message of request, include user totem information.
In step S402: if when the CAS of ownership place Mobile Multimedia Broadcasting platform does not detect business cipher key, the CAS to visited place Mobile Multimedia Broadcasting platform asks business cipher key corresponding to this secure service key request;
In step S403: the CAS of visited place Mobile Multimedia Broadcasting platform returns to this business cipher key to the CAS of ownership place Mobile Multimedia Broadcasting platform;
In step S404: user ascription area Mobile Multimedia Broadcasting platform CAS is used corresponding user key to be encrypted business cipher key;
In step S405: ownership place Mobile Multimedia Broadcasting platform CAS returns to visited place Mobile Multimedia Broadcasting platform CAS by the business cipher key after encrypting.
Fig. 5 shows the device of a kind of secure service key that the embodiment of the present invention provides.When this device is roamed for user terminal, the device of user's secret key encryption business cipher key, can be placed in mobile multimedia broadcast system.For convenience of description, only show part related to the present invention here.Described system comprises:
Encrypt request unit 501, the mobile multimedia broadcasting service platform request secure service key for the mobile multimedia broadcasting service platform from terminal visited place to terminal attaching ground; As detailed above.
Business cipher key ciphering unit 502, is detecting after business cipher key according to secure service key request for the mobile multimedia broadcasting service platform on terminal attaching ground, uses respective user key to be encrypted business cipher key; As detailed above.
Business cipher key returns to unit 503, for the mobile multimedia broadcasting service platform from terminal attaching ground, the business cipher key encrypting is sent to the mobile multimedia broadcasting service platform of terminal visited place.As detailed above.
By above-mentioned three unit, the mobile multimedia broadcasting service platform of visited place can realize safely the business cipher key that it will be sent to terminal and be encrypted.
Said system also comprises that business cipher key encrypts request initiating cell, for triggering when the bidirectional terminal request effective traffic key or when business cipher key upgrades and need to send to unidirectional terminal, encrypts request unit 501 and initiates request secure service keys.As detailed above.
Said system can also comprise business cipher key request unit, when can't detect business cipher key after terminal attaching ground Mobile Multimedia Broadcasting platform is received secure service key request to terminal visited place Mobile Multimedia Broadcasting platform request business cipher key.As detailed above.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. an encryption method of using in mobile multimedia broadcast system, is characterized in that, when user terminal is roamed described in method comprise:
The mobile multimedia broadcasting service platform of terminal visited place is to the mobile multimedia broadcasting service platform request secure service key on terminal attaching ground;
The mobile multimedia broadcasting service platform on terminal attaching ground after business cipher key being detected, is used respective user key to be encrypted business cipher key according to secure service key request; The mobile multimedia broadcasting service platform on terminal attaching ground is received after the request of encryption, while business cipher key not detected, to encrypting business cipher key corresponding to request described in the mobile multimedia broadcasting service platform request of terminal visited place; The mobile multimedia broadcasting service platform of terminal visited place is returned to described business cipher key to the mobile multimedia broadcasting service platform on terminal attaching ground; The mobile multimedia broadcasting service platform on terminal attaching ground is used corresponding user key to be encrypted described business cipher key; Wherein, in visited place, mobile multimedia broadcasting service platform requested service key is asked secure service key simultaneously, and ownership place mobile multimedia broadcasting service platform is directly encrypted after producing business cipher key;
The mobile multimedia broadcasting service platform on terminal attaching ground sends to the business cipher key after encrypting the mobile multimedia broadcasting service platform of terminal visited place.
2. encryption method as claimed in claim 1, is characterized in that, in the solicited message of described request secure service key, includes user ID.
3. encryption method as claimed in claim 2, is characterized in that, comprises business cipher key to be encrypted in the solicited message of described secure service key request simultaneously.
4. encryption method as claimed in claim 1, it is characterized in that, described method is when business cipher key is the mobile multimedia broadcasting service platform request to described terminal attaching ground, and the mobile multimedia broadcasting service platform of described terminal visited place is carried out to mobile multimedia broadcasting service platform request secure service key step and the requested service key on terminal attaching ground simultaneously; With the mobile multimedia broadcasting service platform on terminal attaching ground according to secure service key request after business cipher key being detected, use respective user key to be encrypted step to business cipher key, for: the mobile multimedia broadcasting service platform on described terminal attaching ground after the business cipher key himself producing being detected, is directly used respective user key to be encrypted business cipher key according to secure service key request.
5. the encryption method as described in claim as arbitrary in claim 1 to 4, it is characterized in that, the mobile multimedia broadcasting service platform of described terminal visited place, in the mobile multimedia broadcasting service platform request secure service key step on terminal attaching ground, comprises the opportunity of initiating request:
During terminal request effective traffic key; And
When business cipher key upgrades and need to send to terminal.
6. encryption method as claimed in claim 1, it is characterized in that, it is characterized in that, the mobile multimedia broadcasting service platform of described terminal visited place, in the mobile multimedia broadcasting service platform request secure service key step on terminal attaching ground, comprises the opportunity of initiating request:
During terminal request effective traffic key; And
When business cipher key upgrades and need to send to terminal.
7. a mobile multimedia broadcast system, is characterized in that, the device of user's secret key encryption business cipher key when described system comprises a user terminal roaming, and described device comprises:
Encrypt request unit, the mobile multimedia broadcasting service platform request secure service key for the mobile multimedia broadcasting service platform from terminal visited place to terminal attaching ground;
Business cipher key ciphering unit, is detecting after business cipher key according to secure service key request for the mobile multimedia broadcasting service platform on terminal attaching ground, uses respective user key to be encrypted business cipher key;
Business cipher key returns to unit, for the mobile multimedia broadcasting service platform from terminal attaching ground, the business cipher key encrypting is sent to the mobile multimedia broadcasting service platform of terminal visited place;
Wherein, in visited place, mobile multimedia broadcasting service platform requested service key is asked secure service key simultaneously, and ownership place mobile multimedia broadcasting service platform is directly encrypted after producing business cipher key.
8. system as claimed in claim 7, it is characterized in that, described system also comprises that business cipher key encrypts request initiating cell, for triggering when the bidirectional terminal request effective traffic key or when business cipher key upgrades and need to send to unidirectional terminal, encrypts request unit and initiates request secure service key.
9. system as claimed in claim 7 or 8, it is characterized in that, described system also comprises business cipher key request unit, when can't detect business cipher key after terminal attaching ground Mobile Multimedia Broadcasting platform is received secure service key request to terminal visited place Mobile Multimedia Broadcasting platform request business cipher key.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910107364.9A CN101888628B (en) | 2009-05-15 | 2009-05-15 | Mobile multimedia broadcasting system and encryption method employed by same |
| PCT/CN2010/072795 WO2010130228A1 (en) | 2009-05-15 | 2010-05-14 | Mobile multimedia broadcasting system and applied encryption method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910107364.9A CN101888628B (en) | 2009-05-15 | 2009-05-15 | Mobile multimedia broadcasting system and encryption method employed by same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101888628A CN101888628A (en) | 2010-11-17 |
| CN101888628B true CN101888628B (en) | 2014-11-05 |
Family
ID=43074299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910107364.9A Active CN101888628B (en) | 2009-05-15 | 2009-05-15 | Mobile multimedia broadcasting system and encryption method employed by same |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101888628B (en) |
| WO (1) | WO2010130228A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105515768B (en) | 2016-01-08 | 2017-07-21 | 腾讯科技（深圳）有限公司 | A kind of methods, devices and systems of more new key |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1829389A (en) * | 2006-04-14 | 2006-09-06 | 中国移动通信集团公司 | Method and system for holding terminal nomadism in mobile broadcast television service |
| CN101383673A (en) * | 2008-10-20 | 2009-03-11 | 中兴通讯股份有限公司 | Controlling method and system for mobile multimedia broadcast service |
| CN101394243A (en) * | 2008-10-29 | 2009-03-25 | 中兴通讯股份有限公司 | System and method for realizing mobile multimedia broadcast service |
| CN101409595A (en) * | 2008-11-26 | 2009-04-15 | 中兴通讯股份有限公司 | System and method for implementing mobile multimedia broadcast service |
-
2009
- 2009-05-15 CN CN200910107364.9A patent/CN101888628B/en active Active
-
2010
- 2010-05-14 WO PCT/CN2010/072795 patent/WO2010130228A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1829389A (en) * | 2006-04-14 | 2006-09-06 | 中国移动通信集团公司 | Method and system for holding terminal nomadism in mobile broadcast television service |
| CN101383673A (en) * | 2008-10-20 | 2009-03-11 | 中兴通讯股份有限公司 | Controlling method and system for mobile multimedia broadcast service |
| CN101394243A (en) * | 2008-10-29 | 2009-03-25 | 中兴通讯股份有限公司 | System and method for realizing mobile multimedia broadcast service |
| CN101409595A (en) * | 2008-11-26 | 2009-04-15 | 中兴通讯股份有限公司 | System and method for implementing mobile multimedia broadcast service |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2010130228A1 (en) | 2010-11-18 |
| CN101888628A (en) | 2010-11-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9325507B2 (en) | System and method for managing mobile device using device-to-device communication | |
| JP2004214779A (en) | Wireless communication system, shared key management server, and wireless terminal | |
| KR20150069982A (en) | Method and apparatus for secured communication and multimedia device adopting the same | |
| US9148757B2 (en) | Method for tracking a mobile device onto a remote displaying unit | |
| JP4917116B2 (en) | Data encryption system, communication device, and data encryption method | |
| CN101415187A (en) | Method for implementing position business, method and apparatus for broadcasting base station geographic position information | |
| JP4962237B2 (en) | Program and method for managing information on location of portable device and file encryption key | |
| CN110234102B (en) | Communication method and apparatus | |
| KR101568871B1 (en) | Encrypting method for vital control system | |
| KR101326345B1 (en) | Method and system for providing information using permission process through near communication | |
| CN108156604B (en) | Group calling encryption transmission method and device of cluster system, cluster terminal and system | |
| CN103856938A (en) | Encryption and decryption method, system and device | |
| CN101448286B (en) | A roaming authorization method of mobile digital TV user | |
| CN104080087A (en) | Wireless access method and device of video monitoring system | |
| CN101888628B (en) | Mobile multimedia broadcasting system and encryption method employed by same | |
| CN101425862B (en) | Mobile multimedia broadcast service operation management system and method | |
| CN101917671B (en) | Method for managing authentication parameters and terminal | |
| CN110213252B (en) | Communication method, terminal equipment and network equipment | |
| CN103986570A (en) | Safe data transmission method of smart instrument system | |
| CN107613572A (en) | A kind of connection method of wireless signal and system | |
| CN101394243B (en) | System and method for realizing mobile multimedia broadcast service | |
| CN102123390B (en) | Method, device and terminal for processing service keys | |
| KR20060112597A (en) | Method and system for resetting memory of mobile terminal and mobile terminal having a memory reset function | |
| CN101478725B (en) | Service cipher key synchronization method and system | |
| CN102026092A (en) | Method and network for mobile multimedia broadcasting service key synchronization |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |