CN108307324A - A kind of broadcast message safe transmission method and device - Google Patents
A kind of broadcast message safe transmission method and device Download PDFInfo
- Publication number
- CN108307324A CN108307324A CN201810059913.9A CN201810059913A CN108307324A CN 108307324 A CN108307324 A CN 108307324A CN 201810059913 A CN201810059913 A CN 201810059913A CN 108307324 A CN108307324 A CN 108307324A
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- Prior art keywords
- key
- broadcast message
- mobile terminal
- safe transmission
- decryption
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Classifications
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- 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
-
- 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
- H04L9/0891—Revocation or update of secret information, e.g. encryption key update or rekeying
-
- 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]
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Multimedia (AREA)
- Mobile Radio Communication Systems (AREA)
- Telephone Function (AREA)
Abstract
The present invention relates to mobile communication technology field, discloses a kind of broadcast message safe transmission method and device, this method include：The broadcast message that obtaining information in mobile terminal delivery system is sent；Judge in the broadcast message whether to include tag bit string, if so, being updated the key in mobile terminal；Otherwise, it is decrypted according to broadcast message described in the key pair in the mobile terminal, and the message after decryption is shown on mobile terminals, pass through the encryption and decryption technique of agreement, realize the safe transmission of broadcast message, and key updating operation can be entered by key updating instruction triggers mobile terminal, further improve the safety of broadcast message.
Description
Technical field
The present invention relates to mobile communication technology field more particularly to a kind of broadcast message safe transmission methods and device.
Background technology
Currently, the broadcast channel in mobile communication is common signal channel, and it is one-way channel, information can only be from wireless network
It is sent to mobile terminal, when normal communication, information issuing system passes through broadcast channel to operator wireless network pushed information, base station
To all mobile terminal broadcast messages.When there are pseudo-base station, the complete anolog base station operation of pseudo-base station, the swindleness that pseudo-base station is carried
It deceives information to be sent by the peritropous mobile terminal of same broadcast channel, due to lacking bidirectional authentication mechanism and encryption and decryption
Mechanism, when mobile terminal receives information from broadcast channel, it is from operator base station or to come that the information received, which cannot be distinguished,
From pseudo-base station, therefore it is easy to be cheated by pseudo-base station.Pseudo-base station not only can send fraud information to mobile terminal, and can be with
Sending influences the information that social stability even threatens the national security, and is the major hidden danger of information security field.
Invention content
It is a primary object of the present invention to propose a kind of broadcast message safe transmission method and device, pass through the encryption of agreement
Decryption technology realizes the safe transmission of broadcast message, and can enter key updating by key updating instruction triggers mobile terminal
Operation, further improves the safety of broadcast message.
To achieve the above object, a kind of broadcast message safe transmission method provided by the invention, including：
The broadcast message that obtaining information in mobile terminal delivery system is sent；
Judge in the broadcast message whether to include tag bit string, if so, being updated the key in mobile terminal；
Otherwise, it is decrypted according to broadcast message described in the key pair in the mobile terminal, and the message after decryption is shown
On mobile terminals.
Optionally, further include before the broadcast message that the obtaining information in mobile terminal delivery system is sent：
Mobile terminal and information issuing system make an appointment enciphering and deciphering algorithm to broadcast message progress encryption and decryption；
Security centre generates the key of encryption and decryption according to the enciphering and deciphering algorithm.
Optionally, the key in mobile terminal be updated including：
Key parameter information is intercepted from all broadcast messages comprising tag bit string, and the key parameter information storage is arrived
Preset integrity key memory space；
All key parameter information being truncated to are spliced into integrity key, the integrity key is used in combination to replace in mobile terminal
Key.
Optionally, further include after the key in mobile terminal is updated：
Subsequent broadcast message is decrypted by replaced new key.
Optionally, further include in the broadcast message：Integrity key length, the content and length of key parameter information, it is close
Key parameter information is in the position of integrity key memory space.
As another aspect of the present invention, a kind of broadcast message safe transmission device provided, including：
Acquisition module, the broadcast message sent for obtaining information in mobile terminal delivery system；
Judgment module, for judging in the broadcast message whether to include tag bit string；
Update module, for when in broadcast message including tag bit string, being then updated to the key in mobile terminal；
Display module is decrypted, is used for when not including tag bit string in broadcast message, according to the key in the mobile terminal
The broadcast message is decrypted, and the message after decryption is shown on mobile terminals.
Optionally, further include：
Provisioning modules add the broadcast message for mobile terminal and information issuing system enciphering and deciphering algorithm of making an appointment
Decryption；
Key generation module generates the key of encryption and decryption for security centre according to the enciphering and deciphering algorithm.
Optionally, the update module includes：
Interception unit, for intercepting key parameter information from all broadcast messages comprising tag bit string, by the key
Parameter information is stored to preset integrity key memory space；
Concatenation unit is used in combination the integrity key to replace for all key parameter information being truncated to be spliced into integrity key
Change the key in mobile terminal.
Optionally, further include：
Subsequent decryption module, for subsequent broadcast message to be decrypted by replaced new key.
Optionally, further include in the broadcast message：Integrity key length, the content and length of key parameter information, it is close
Key parameter information is in the position of integrity key memory space.
A kind of broadcast message safe transmission method proposed by the present invention and device, this method include：Obtaining information in mobile terminal is sent out
The broadcast message that distribution system is sent；Judge in the broadcast message whether to include tag bit string, if so, to mobile terminal
In key be updated；Otherwise, it is decrypted according to broadcast message described in the key pair in the mobile terminal, and will decryption
Message afterwards is shown on mobile terminals, by the encryption and decryption technique of agreement, realizes the safe transmission of broadcast message, and can lead to
It crosses key updating instruction triggers mobile terminal and enters key updating operation, further improve the safety of broadcast message.
Description of the drawings
Fig. 1 is a kind of broadcast message safe transmission method flow chart that the embodiment of the present invention one provides；
Fig. 2 is another broadcast message safe transmission method flow chart that the embodiment of the present invention one provides；
Fig. 3 is the method flow diagram of step S30 in Fig. 1；
Fig. 4 is another broadcast message safe transmission method flow chart that the embodiment of the present invention one provides；
Fig. 5 is a kind of broadcast message safe transmission device exemplary block diagram provided by Embodiment 2 of the present invention；
Fig. 6 is another safe transmission device exemplary block diagram that broadcasts the message provided by Embodiment 2 of the present invention；
Fig. 7 is the exemplary block diagram of update module in Fig. 5；
Fig. 8 is another broadcast message safe transmission device exemplary block diagram provided by Embodiment 2 of the present invention.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific implementation mode
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
In subsequent description, using for indicating that the suffix of such as " module ", " component " or " unit " of element is only
Be conducive to the explanation of the present invention, itself there is no specific meanings.Therefore, " module " can mixedly make with " component "
With.
Embodiment one
As shown in Figure 1, in the present embodiment, a kind of broadcast message safe transmission method, including：
The broadcast message that S10, obtaining information in mobile terminal delivery system are sent；
S20, judge in the broadcast message whether to include tag bit string, if so, S30, to the key in mobile terminal into
Row update；
Otherwise, S40, be decrypted according to broadcast message described in the key pair in the mobile terminal, and by the message after decryption
Display is on mobile terminals.
In the present embodiment, by the encryption and decryption technique of agreement, the safe transmission of broadcast message is realized, and can be by close
Key update instruction triggers mobile terminal enters key updating operation, further improves the safety of broadcast message.
In the present embodiment, mobile terminal includes：Smart mobile phone, function machine, Intelligent bracelet, wearable device etc. can lead to
Cross the terminal that broadcast channel receives broadcast message.
In the present embodiment, mobile terminal needs, which make Cell Broadcast CB software module by terminal producer before manufacture, changes
Into：First, storage RSA key is supported（At least 2048bit）；Mobile terminal supports RSA enciphering and deciphering algorithms；Secondly, mobile whole
The Cell Broadcast CB software module at end is needed to communication chip（Such as high pass chip）Broadcast message source code flow out is handled.
In the present embodiment, it is only necessary to information issuing system software and mobile terminal are improved, without to operator's net
Network undergoes technological transformation, technical feasibility and low-cost.
In the present embodiment, because mobile terminal is forced to use decryption technology, the information of pseudo-base station broadcast can be by mobile whole
End is identified as invalid information and not shows or be displayed as mess code information.Pseudo-base station can not play mobile terminal user swindle
Or the effect of spread rumors, this information security field major hidden danger are released.
In the present embodiment, if do not include tag bit string in broadcasting the message, key is indicated without update, movement is eventually
End uses the key of default setting（RSA public keys）, broadcast message is decrypted.If information issuing system and mobile terminal are also
Whether agreement has signature verification, terminal also to need the signature of verification information legal, and signature does not conform to rule and directly abandons message content.If
For broadcast message from legal delivery system, mobile terminal user will be seen that correct message content；If broadcast message is from puppet
Base station or other illegality equipments, mobile terminal user can't see message or only see mess code.
In the present embodiment, when in the broadcast message that mobile terminal receives including tag bit string,（Such as
0xFFFFFFFFFFFFFF）, indicate that the broadcast message is key updating command information, mobile terminal enters key updating operation shape
State can save terminal electricity at this point, terminal goes whether detection security centre has newer key without timing connection internet
Amount, also avoid magnanimity mobile terminal causes to cause to impact to mobile communications network due to connecting internet and doing key updating；Exempt from
In addition to mobile terminal user pays campus network, key updating is realized the function machine of not function of surfing the Net.
As shown in Fig. 2, in the present embodiment, further including before the step S10：
S01, mobile terminal and information issuing system make an appointment enciphering and deciphering algorithm to broadcast message progress encryption and decryption；
S02, security centre generate the key of encryption and decryption according to the enciphering and deciphering algorithm.
In the present embodiment, enciphering and deciphering algorithm is the asymmetric enciphering and deciphering algorithms of RSA, which includes：Public key, private
Key, encryption-decryption algorithm, encrypting and decrypting process are：Broadcast message is encrypted by Encryption Algorithm and private key, is obtained close
Text, ciphering process need to use private key；Ciphertext is decrypted by decipherment algorithm and public key, is obtained in plain text, decrypting process needs
Use decipherment algorithm and public key.
In the present embodiment, security centre generates the key of encryption and decryption according to enciphering and deciphering algorithm, is also responsible for information
Delivery system carry out safety certification, through safety certification after, information issuing system obtains newest key from security centre（Private key
And public key）.
As shown in figure 3, in the present embodiment, the step S30 includes：
S31, key parameter information is intercepted from all broadcast messages comprising tag bit string, the key parameter information is deposited
Store up preset integrity key memory space；
S32, all key parameter information being truncated to are spliced into integrity key, the integrity key is used in combination to replace mobile terminal
In key.
In the present embodiment, in addition to key parameter information further includes in the broadcast message：Integrity key length, key ginseng
The content and length of number information, key parameter information is in the position of integrity key memory space.
As shown in figure 4, in the present embodiment, further including after the step S30：
S50, subsequent broadcast message is decrypted by replaced new key.
Embodiment two
As shown in figure 5, in the present embodiment, a kind of broadcast message safe transmission device, including：
Acquisition module 10, the broadcast message sent for obtaining information in mobile terminal delivery system；
Judgment module 20, for judging in the broadcast message whether to include tag bit string；
Update module 30, for when in broadcast message including tag bit string, being then updated to the key in mobile terminal；
Display module 40 is decrypted, is used for when not including tag bit string in broadcast message, according to close in the mobile terminal
The broadcast message is decrypted in key, and the message after decryption is shown on mobile terminals.
In the present embodiment, by the encryption and decryption technique of agreement, the safe transmission of broadcast message is realized, and can be by close
Key update instruction triggers mobile terminal enters key updating operation, further improves the safety of broadcast message.
In the present embodiment, mobile terminal includes：Smart mobile phone, function machine, Intelligent bracelet, wearable device etc. can lead to
Cross the terminal that broadcast channel receives broadcast message.
In the present embodiment, mobile terminal needs, which make Cell Broadcast CB software module by terminal producer before manufacture, changes
Into：First, storage RSA key is supported（At least 2048bit）；Mobile terminal supports RSA enciphering and deciphering algorithms；Secondly, mobile whole
The Cell Broadcast CB software module at end is needed to communication chip（Such as high pass chip）Broadcast message source code flow out is handled.
In the present embodiment, it is only necessary to information issuing system software and mobile terminal only be needed to improve, without to operator's net
Network undergoes technological transformation, technical feasibility and low-cost.
In the present embodiment, because mobile terminal is forced to use decryption technology, the information of pseudo-base station broadcast can be by mobile whole
End is identified as invalid information and not shows or be displayed as mess code information.Pseudo-base station can not play mobile terminal user swindle
Or the effect of spread rumors, this information security field major hidden danger are released.
In the present embodiment, if do not include tag bit string in broadcasting the message, key is indicated without update, movement is eventually
End uses the key of default setting（RSA public keys）, broadcast message is decrypted.If information issuing system and mobile terminal are also
Whether agreement has signature verification, terminal also to need the signature of verification information legal, and signature does not conform to rule and directly abandons message content.If
For broadcast message from legal delivery system, mobile terminal user will be seen that correct message content；If broadcast message is from puppet
Base station or other illegality equipments, mobile terminal user can't see message or only see mess code.
In the present embodiment, when in the broadcast message that mobile terminal receives including tag bit string,（Such as
0xFFFFFFFFFFFFFF）, indicate that the broadcast message is key updating command information, mobile terminal enters key updating operation shape
State can save terminal electricity at this point, terminal goes whether detection security centre has newer key without timing connection internet
Amount, also avoid magnanimity mobile terminal causes to cause to impact to mobile communications network due to connecting internet and doing key updating；Exempt from
In addition to mobile terminal user pays campus network, key updating is realized the function machine of not function of surfing the Net.
As shown in fig. 6, in the present embodiment, broadcast message safe transmission device further includes：
Provisioning modules 50 make an appointment enciphering and deciphering algorithm to broadcast message progress for mobile terminal and information issuing system
Encryption and decryption；
Key generation module 60 generates the key of encryption and decryption for security centre according to the enciphering and deciphering algorithm.
In the present embodiment, enciphering and deciphering algorithm is the asymmetric enciphering and deciphering algorithms of RSA, which includes：Public key, private
Key, encryption-decryption algorithm, encrypting and decrypting process are：Broadcast message is encrypted by Encryption Algorithm and private key, is obtained close
Text, ciphering process need to use private key；Ciphertext is decrypted by decipherment algorithm and public key, is obtained in plain text, decrypting process needs
Use decipherment algorithm and public key.
In the present embodiment, security centre generates the key of encryption and decryption according to enciphering and deciphering algorithm, is also responsible for information
Delivery system carry out safety certification, through safety certification after, information issuing system obtains newest key from security centre（Private key
And public key）.
As shown in fig. 7, in the present embodiment, the update module includes：
Interception unit 31 will be described close for intercepting key parameter information from all broadcast messages comprising tag bit string
Key parameter information is stored to preset integrity key memory space；
The integrity key is used in combination for all key parameter information being truncated to be spliced into integrity key in concatenation unit 32
Replace the key in mobile terminal.
In the present embodiment, in addition to key parameter information further includes in the broadcast message：Integrity key length, key ginseng
The content and length of number information, key parameter information is in the position of integrity key memory space.
As shown in figure 8, in the present embodiment, broadcast message safe transmission device further includes：
Subsequent decryption module 70, for subsequent broadcast message to be decrypted by replaced new key.
It should be noted that herein, the terms "include", "comprise" or its any other variant are intended to nonexcludability
Include so that including a series of elements process, method, article or device not only include those elements, but also
Including other elements that are not explicitly listed, or further include for this process, method, article or device intrinsic want
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including the element
Process, method, there is also other identical elements in article or device.
The embodiments of the present invention are for illustration only, can not represent the quality of embodiment.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment method can
Realized by the mode of software plus required general hardware platform, naturally it is also possible to by hardware, but in many cases the former
It is more preferably embodiment.Based on this understanding, technical scheme of the present invention substantially makes tribute to the prior art in other words
The part offered can be expressed in the form of software products, which is stored in a storage medium（Such as
ROM/RAM, magnetic disc, CD）In, including some instructions use is so that a station terminal equipment（Can be mobile phone, computer, service
Device, air conditioner or network equipment etc.）Execute the method described in each embodiment of the present invention.
It these are only the preferred embodiment of the present invention, be not intended to limit the scope of the invention, it is every to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of broadcast message safe transmission method, which is characterized in that including：
The broadcast message that obtaining information in mobile terminal delivery system is sent；
Judge in the broadcast message whether to include tag bit string, if so, being updated the key in mobile terminal；
Otherwise, it is decrypted according to broadcast message described in the key pair in the mobile terminal, and the message after decryption is shown
On mobile terminals.
2. a kind of broadcast message safe transmission method according to claim 1, which is characterized in that the acquisition for mobile terminal
Further include before the broadcast message that information issuing system is sent：
Mobile terminal and information issuing system make an appointment enciphering and deciphering algorithm to broadcast message progress encryption and decryption；
Security centre generates the key of encryption and decryption according to the enciphering and deciphering algorithm.
3. a kind of broadcast message safe transmission method according to claim 2, which is characterized in that described in mobile terminal
Key be updated including：
Key parameter information is intercepted from all broadcast messages comprising tag bit string, and the key parameter information storage is arrived
Preset integrity key memory space；
All key parameter information being truncated to are spliced into integrity key, the integrity key is used in combination to replace in mobile terminal
Key.
4. a kind of broadcast message safe transmission method according to claim 3, which is characterized in that described in mobile terminal
Key be updated after further include：
Subsequent broadcast message is decrypted by replaced new key.
5. a kind of broadcast message safe transmission method according to claim 3, which is characterized in that in the broadcast message also
Including：Integrity key length, the content and length of key parameter information, key parameter information is in the position of integrity key memory space
It sets.
6. a kind of broadcast message safe transmission device, which is characterized in that including：
Acquisition module, the broadcast message sent for obtaining information in mobile terminal delivery system；
Judgment module, for judging in the broadcast message whether to include tag bit string；
Update module, for when in broadcast message including tag bit string, being then updated to the key in mobile terminal；
Display module is decrypted, is used for when not including tag bit string in broadcast message, according to the key in the mobile terminal
The broadcast message is decrypted, and the message after decryption is shown on mobile terminals.
7. a kind of broadcast message safe transmission device according to claim 6, which is characterized in that further include：
Provisioning modules add the broadcast message for mobile terminal and information issuing system enciphering and deciphering algorithm of making an appointment
Decryption；
Key generation module generates the key of encryption and decryption for security centre according to the enciphering and deciphering algorithm.
8. a kind of broadcast message safe transmission device according to claim 7, which is characterized in that the update module packet
It includes：
Interception unit, for intercepting key parameter information from all broadcast messages comprising tag bit string, by the key
Parameter information is stored to preset integrity key memory space；
Concatenation unit is used in combination the integrity key to replace for all key parameter information being truncated to be spliced into integrity key
Change the key in mobile terminal.
9. a kind of broadcast message safe transmission device according to claim 8, which is characterized in that further include：
Subsequent decryption module, for subsequent broadcast message to be decrypted by replaced new key.
10. a kind of broadcast message safe transmission device according to claim 8, which is characterized in that in the broadcast message
Further include：Integrity key length, the content and length of key parameter information, key parameter information is in integrity key memory space
Position.
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| CN111951420A (en) * | 2020-08-27 | 2020-11-17 | 深圳成谷智能科技有限公司 | Method and device for safely transmitting ETC broadcast message |
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| CN105376213A (en) * | 2015-08-04 | 2016-03-02 | 电子科技大学 | Identity-based broadcast encryption scheme |
| CN105978876A (en) * | 2016-05-11 | 2016-09-28 | 杭州图南电子有限公司 | Instruction encryption method applied to broadcast communication |
| CN105897405A (en) * | 2016-06-02 | 2016-08-24 | 北京赛思信安技术股份有限公司 | 128-bit symmetric secret key production and protection method |
| CN106454815A (en) * | 2016-06-30 | 2017-02-22 | 华南理工大学 | Routing method for wireless sensor network based on LEACH protocol |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109361448A (en) * | 2018-09-30 | 2019-02-19 | 上海无线通信研究中心 | A kind of vacant lot wireless communications method and its system towards Air communication platform |
| CN111951420A (en) * | 2020-08-27 | 2020-11-17 | 深圳成谷智能科技有限公司 | Method and device for safely transmitting ETC broadcast message |
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