CN104113836B - A kind of method of encryption of conversing, communication terminal and base station - Google Patents
A kind of method of encryption of conversing, communication terminal and base station Download PDFInfo
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- CN104113836B CN104113836B CN201410366822.1A CN201410366822A CN104113836B CN 104113836 B CN104113836 B CN 104113836B CN 201410366822 A CN201410366822 A CN 201410366822A CN 104113836 B CN104113836 B CN 104113836B
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- call
- secret key
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- dialog context
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/02—Protecting privacy or anonymity, e.g. protecting personally identifiable information [PII]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/03—Protecting confidentiality, e.g. by encryption
- H04W12/037—Protecting confidentiality, e.g. by encryption of the control plane, e.g. signalling traffic
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- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a kind of method of encryption of conversing, communication terminal and base station, belong to the communications field.Said method comprising the steps of: to converse secret key according to preset algorithm stochastic generation; Sent the call request comprising the secret key of described call to called end by network side; If described called end accepts described call request, be then encrypted according to described call secret key pair dialog context and send to described called end by described network side; The secret key of described call is changed according to predeterminated frequency.In the method for the embodiment of the present invention, communication terminal and base station; calling terminal to be conversed secret key according to predeterminated frequency and preset algorithm stochastic generation; called end is sent to by network side; dialog context is made to be difficult to be cracked; the extremely strong dialog context protecting both call sides, the call for user provides safer guarantee.
Description
Technical field
The present invention relates to the communications field, particularly relate to a kind of method of encryption of conversing, communication terminal and base station.
Background technology
Along with socioeconomic fast development, the rhythm of life of people is more and more faster, and increasing people uses phone to carry out Bussiness Communications, emotion communication etc.Phone has furthered the distance of people, facilitates interchange each other, improves operating efficiency.
But; along with the development of science and technology; also make the technological means cracking dialog context more and more advanced; at present; call encryption is all utilize public key to be encrypted protection to dialog context substantially; important dialog context and business secret are often obtained eavesdropping inadvertently in the dark, cause great potential safety hazard to the privacy of user and business secret.
Summary of the invention
In view of this, the technical problem to be solved in the present invention is to provide a kind of method of encryption of conversing, and is easily cracked, causes the problem of great potential safety hazard to the privacy of user and business secret to solve existing call cipher mode.
It is as follows that the present invention solves the problems of the technologies described above adopted technical scheme:
Converse encryption a method, be applied to calling terminal, the method comprises the following steps:
To converse secret key according to preset algorithm stochastic generation;
Sent the call request comprising the secret key of this call to called end by network side;
If this called end accepts this call request, be then encrypted according to this call secret key pair dialog context and send to this called end by this network side;
The secret key of this call is changed according to predeterminated frequency.
Preferably, this step changing the secret key of this call according to predeterminated frequency is specially:
To converse secret key according to predeterminated frequency and this preset algorithm stochastic generation;
Sent the secret key of call of this stochastic generation to this called end by this network side;
Call secret key pair dialog context according to this predeterminated frequency and this stochastic generation is encrypted and sends to this called end by this network side.
The present invention also aims to a kind of method providing encryption of conversing, be applied to network side, the method comprises the following steps:
Receive the call request comprising secret key of conversing that calling terminal sends;
The call request comprising the secret key of this call is sent to called end;
If this called end accepts this call request, then receive this calling terminal according to the dialog context of this call secret key encryption and the dialog context of this encryption is sent to this called end;
Forward the secret key of call that this calling terminal changes according to predeterminated frequency and the dialog context according to the secret key encryption of the call of this replacing.
Preferably, the secret key of call changed according to predeterminated frequency of this calling terminal of this forwarding and comprising the following steps according to the dialog context of the secret key encryption of the call of this replacing:
Receive and send this calling terminal according to the secret key of the call of predeterminated frequency stochastic generation to this called end;
Receive and send the dialog context of this calling terminal according to the secret key encryption of the call of this stochastic generation to this called end.
Another object of the present invention is also to provide a kind of communication terminal, and this communication terminal comprises:
Secret key generation unit, for secret key of conversing according to preset algorithm stochastic generation;
First calling unit, for sending the call request comprising the secret key of this call to called end by network side;
First judging unit, judges whether this called end receives this call request;
Ciphering unit, for being encrypted according to this call secret key pair dialog context;
First transmitting element, for sending to this called end by according to the dialog context of the secret key encryption of this call by this network side;
Change unit, for changing the secret key of this call according to predeterminated frequency.
Preferably, this replacing unit specifically for:
Control this call secret key generation unit to converse secret key according to predeterminated frequency and this preset algorithm stochastic generation;
Control this first transmitting element sends this stochastic generation to this called end secret key of call by this network side;
Control this ciphering unit to be encrypted according to the call secret key pair dialog context of this predeterminated frequency and this stochastic generation;
And control this first transmitting element and send to this called end by according to the dialog context of the call of this stochastic generation secret key encryption by this network side.
Further, the present invention also aims to provide a kind of communication base station, this communication base station comprises:
Receiving element, for receiving the call request comprising secret key of conversing that calling terminal sends and the dialog context encrypted according to the secret key of this call;
Second calling unit, for sending the call request comprising the secret key of this call to called end;
Second judging unit, for judging whether this called end receives this call request;
Second transmitting element, for sending to this called end by the dialog context of this encryption;
Retransmission unit, for forwarding the secret key of call that this calling terminal changes according to predeterminated frequency and the dialog context according to the secret key encryption of the call of this replacing.
Preferably, this retransmission unit specifically for:
Control this receiving element and receive this calling terminal according to the secret key of the call of predeterminated frequency stochastic generation, and according to the dialog context that the secret key of the call of this stochastic generation is encrypted;
Control this second transmitting element and send this calling terminal according to the secret key of the call of predeterminated frequency stochastic generation to this called end, and according to the dialog context that the secret key of the call of this stochastic generation is encrypted.
In the method for the embodiment of the present invention, in communication terminal and base station, calling terminal to be conversed secret key according to preset algorithm stochastic generation, called end is sent to by network side, owing to conversing, secret key is stochastic generation, its difficulty be cracked is very big, dialog context is made to be difficult to be acquired, and the secret key of this call generates according to predeterminated frequency, namely change every Preset Time, even if a secret key of call is cracked, also be difficult to crack the secret key of whole calls, namely whole dialog context can not be obtained, the extremely strong dialog context protecting both call sides, call for user provides safer guarantee.
Accompanying drawing explanation
The method of the call encryption that Fig. 1 provides for the embodiment of the present invention is applied to the flow chart of calling terminal;
Fig. 2 is the realization flow figure of the method for the call encryption that first embodiment of the invention provides;
Fig. 3 is that the method for the call encryption that the embodiment of the present invention provides is applied to the flow chart of network side;
Fig. 4 is the realization flow figure of the method for the call encryption that second embodiment of the invention provides;
Fig. 5 is the frame construction drawing of the communication terminal that the embodiment of the present invention provides;
Fig. 6 is the frame construction drawing of the communication base station that the embodiment of the present invention provides.
Embodiment
In order to make technical problem to be solved by this invention, technical scheme and beneficial effect clearly, understand, 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, be not intended to limit the present invention.
Embodiments providing a kind of method of encryption of conversing, for carrying out stricter encipherment protection to communication process, preventing dialog context to be ravesdropping.
The call encryption method that Fig. 1 shows the embodiment of the present invention to be provided is applied to the flow process of calling terminal, and for convenience of explanation, only list the part relevant to the embodiment of the present invention, details are as follows:
The method of the call encryption that the embodiment of the present invention provides, is applied to calling terminal, comprises the following steps:
Step S100, to converse secret key according to preset algorithm stochastic generation.
In the step s 100, when user needs the communication terminal calling out other users, its terminal held is calling terminal, and this calling terminal to be conversed secret key according to preset algorithm stochastic generation.
Step S200, sends the call request comprising the secret key of this call to called end by network side.
In step s 200, when calling terminal sends call request, the secret key of call that calling terminal generates by network side (communication base station) is included in call request and sends to called end.
Step S300, if this called end accepts this call request, is then encrypted according to this call secret key pair dialog context and sends to this called end by this network side.
In step S300, if this called end receives the secret key of this call, show that this called end receives call request and have received the secret key of this call, call is formal sets up, calling terminal is encrypted according to this call secret key pair dialog context, and by network side, the dialog context of this encryption being sent to this called end, this called end sends back to calling terminal by network side after being also encrypted by this its dialog context of call secret key pair.
Step S400, changes the secret key of this call according to predeterminated frequency.
In step S400, calling terminal changes the secret key of this call according to predeterminated frequency, such as, within every 10 seconds, once to converse secret key according to preset algorithm stochastic generation, by network side, secret for this call key is sent to called end, simultaneously, this call secret key pair current talking content is utilized to be encrypted and to send to called end by network side, called end is decrypted according to the dialog context that the call secret key pair received in advance receives and listens to, and, called end sends back to calling terminal by network side after being encrypted according to its dialog context of call secret key pair of current reception, form a talking link completed, and secret key of conversing is changed according to predeterminated frequency, also the secret key of call can be changed at random according to irregular frequency, strengthen communication security.
In the embodiment of the present invention, to be conversed secret key according to predeterminated frequency and preset algorithm stochastic generation by calling terminal, to carry out sectional encryption to dialog context, can more effective protection dialog context not monitored or all monitored.
Embodiment one:
The call encryption method that Fig. 2 shows first embodiment of the invention to be provided is applied to the realization flow of calling terminal, and for convenience of explanation, only list the part relevant to the embodiment of the present invention, details are as follows:
As one embodiment of the present invention, step S400 comprises the following steps:
Step S401, to converse secret key according to predeterminated frequency and this preset algorithm stochastic generation;
Step S402, sends the secret key of call of this stochastic generation to this called end by this network side;
Step S403, the call secret key pair dialog context according to this predeterminated frequency and this stochastic generation is encrypted and sends to this called end by this network side.
In embodiments of the present invention, after talking link is successfully established, calling terminal to be conversed secret key according to predeterminated frequency and preset algorithm stochastic generation, send secret for the call of generation key to called end every predetermined period by network side, and send to called end by network side after utilizing this call secret key pair dialog context to be encrypted.
Fig. 3 is the flow process that call encryption method that the embodiment of the present invention provides is applied to network side, and for convenience of explanation, only list the part relevant to the embodiment of the present invention, details are as follows:
The call encryption method of what the embodiment of the present invention provided be applied to network side, comprises the following steps:
Step S500, receives the call request comprising secret key of conversing that calling terminal sends.
In step S500, receive the call request that calling terminal sends, this call request comprises the secret key of call, the dialog context sent due to calling terminal is encrypted by the secret key of this call before transmission, needing, when calling out, secret for this call key is sent to called end, being beneficial to called end and being decrypted according to the dialog context of the call secret key pair receipt of subsequent of in advance reception and answering.
Step S600, sends the call request comprising the secret key of this call to called end.
Step S700, if this called end accepts this call request, then receives this calling terminal according to the dialog context of this call secret key encryption and the dialog context of this encryption is sent to this called end;
Step S800, forwards the secret key of call that this calling terminal changes according to predeterminated frequency and the dialog context according to the secret key encryption of the call of this replacing.
In embodiments of the present invention, the secret key of call that calling terminal generates according to preset algorithm has a life cycle, the secret key of call and the dialog context according to the secret key encryption of the call after this replacing will be changed at set intervals, first secret for the call of replacing key is sent to called end by network side, then sends to called end by according to the dialog context of the secret key encryption of the call after this replacing.
Embodiment two:
The call encryption method that Fig. 4 shows second embodiment of the invention to be provided is applied to the realization flow of network side, and for convenience of explanation, only list the part relevant to the embodiment of the present invention, details are as follows:
As one embodiment of the present invention, step S800 comprises the following steps:
Step S801, receives and sends this calling terminal according to the secret key of the call of predeterminated frequency stochastic generation to this called end;
Step S802, receives and sends the dialog context of this calling terminal according to the secret key encryption of the call of this stochastic generation to this called end.
In embodiments of the present invention, network side first sends to called end the secret key of call that calling terminal generates, and then sends the dialog context of calling terminal according to the secret key encryption of this call, is convenient to called end and is decrypted the dialog context received and answers.
Fig. 5 shows the frame structure of the communication terminal that the embodiment of the present invention provides, and for convenience of explanation, only list the part relevant to the embodiment of the present invention, details are as follows:
Embodiments provide a kind of communication terminal 1, comprise
Secret key generation unit 101, for secret key of conversing according to preset algorithm stochastic generation;
First calling unit 102, for sending the call request comprising the secret key of this call to called end by network side;
First judging unit 103, judges whether this called end receives this call request;
Ciphering unit 104, for being encrypted according to this call secret key pair dialog context;
First transmitting element 105, for sending to this called end by according to the dialog context of the secret key encryption of this call by this network side;
Change unit 106, for changing the secret key of this call according to predeterminated frequency.
In embodiments of the present invention, communication terminal comprises base, mobile phone, panel computer, electronic reader etc., the communication terminal that the embodiment of the present invention provides is corresponding to the calling terminal in above-described embodiment and called end, its operation principle and execution mode corresponding with above-described embodiment, here and following examples just do not repeating.
As one embodiment of the present invention, change unit 106 specifically for:
Control this call secret key generation unit 101 to converse secret key according to predeterminated frequency and this preset algorithm stochastic generation;
Control this first transmitting element 105 sends this stochastic generation to this called end secret key of call by this network side;
Control this ciphering unit 104 to be encrypted according to the call secret key pair dialog context of this predeterminated frequency and this stochastic generation;
And control this first transmitting element 105 and send to this called end by according to the dialog context of the call of this stochastic generation secret key encryption by this network side.
Fig. 6 shows the frame structure of the communication base station that the embodiment of the present invention provides, and for convenience of explanation, only list the part relevant to the embodiment of the present invention, details are as follows:
Embodiments provide a kind of communication base station 2, comprising:
Receiving element 201, for receiving the call request comprising secret key of conversing that calling terminal sends and the dialog context encrypted according to the secret key of this call;
Second calling unit 202, for sending the call request comprising the secret key of this call to called end;
Second judging unit 203, for judging whether this called end receives this call request;
Second transmitting element 204, for sending to this called end by the dialog context of this encryption;
Retransmission unit 205, for forwarding the secret key of call that this calling terminal changes according to predeterminated frequency and the dialog context according to the secret key encryption of the call of this replacing.
As one embodiment of the present invention, retransmission unit 205 specifically for:
Control this receiving element 201 and receive this calling terminal according to the secret key of the call of predeterminated frequency stochastic generation, and according to the dialog context that the secret key of the call of this stochastic generation is encrypted;
Control this second transmitting element 204 and send this calling terminal according to the secret key of the call of predeterminated frequency stochastic generation to this called end, and according to the dialog context that the secret key of the call of this stochastic generation is encrypted.
It should be noted that, the technical characteristic in said method embodiment is suitable at this communication terminal and the equal correspondence of communication base station, no longer repeats here.
In the method for the embodiment of the present invention, in communication terminal and base station, calling terminal to be conversed secret key according to preset algorithm stochastic generation, called end is sent to by network side, owing to conversing, secret key is stochastic generation, its difficulty be cracked is very big, dialog context is made to be difficult to be acquired, and the secret key of this call generates according to predeterminated frequency, namely change every Preset Time, even if a secret key of call is cracked, also be difficult to crack the secret key of whole calls, namely whole dialog context can not be obtained, the extremely strong dialog context protecting both call sides, call for user provides safer guarantee.
One of ordinary skill in the art will appreciate that all or part of step realized in above-described embodiment method is that the hardware that can control to be correlated with by program completes, described program can be stored in a computer read/write memory medium, described storage medium, as ROM/RAM, disk, CD etc.
Above with reference to the accompanying drawings of the preferred embodiments of the present invention, not thereby limit to interest field of the present invention.Those skilled in the art do not depart from the scope and spirit of the present invention, and multiple flexible program can be had to realize the present invention, and the feature such as an embodiment can be used for another embodiment and obtains another embodiment.All use do within technical conceive of the present invention any amendment, equivalently replace and improve, all should within interest field of the present invention.
Claims (8)
1. converse encryption a method, be applied to calling terminal, it is characterized in that, said method comprising the steps of:
Calling terminal to be conversed secret key according to preset algorithm stochastic generation;
Calling terminal sends the call request comprising the secret key of described call to called end by network side;
If described called end accepts described call request, then calling terminal is encrypted according to described call secret key pair dialog context and sends to described called end by described network side;
Calling terminal changes the secret key of described call according to predeterminated frequency, generate the new secret key of call, described called end is sent to by the secret key of described call newly and according to the dialog context that described secret key is newly encrypted by network side, called end is decrypted according to the dialog context that the new call secret key pair received receives and listens to, and carries out call encryption according to the secret key of new call.
2. the method for claim 1, is characterized in that, the described step changing the secret key of described call according to predeterminated frequency is specially:
To converse secret key according to predeterminated frequency and described preset algorithm stochastic generation;
Sent the secret key of call of described stochastic generation to described called end by described network side;
Call secret key pair dialog context according to described predeterminated frequency and described stochastic generation is encrypted and sends to described called end by described network side.
3. converse encryption a method, be applied to network side, it is characterized in that, said method comprising the steps of:
Receive the call request comprising secret key of conversing that calling terminal sends;
The call request comprising the secret key of described call is sent to called end;
If described called end accepts described call request, then receive dialog context that described calling terminal encrypts according to the secret key of described call and the dialog context of described encryption is sent to described called end;
Forward the secret key of call that described calling terminal changes according to predeterminated frequency and the dialog context according to the secret key encryption of the call of described replacing.
4. method as claimed in claim 3, is characterized in that, the secret key of call that the described calling terminal of described forwarding is changed according to predeterminated frequency and comprising the following steps according to the dialog context that the secret key of the call of described replacing is encrypted:
Receive and send described calling terminal according to the secret key of the call of predeterminated frequency stochastic generation to described called end;
Receive and send the dialog context of described calling terminal according to the secret key encryption of the call of described stochastic generation to described called end.
5. a communication terminal, is characterized in that, described communication terminal comprises:
Secret key generation unit, for secret key of conversing according to preset algorithm stochastic generation;
First calling unit, for sending the call request comprising the secret key of described call to called end by network side;
First judging unit, judges whether described called end receives described call request;
Ciphering unit, for being encrypted according to described call secret key pair dialog context;
First transmitting element, for sending to described called end by the dialog context encrypted according to the secret key of described call by described network side;
Change unit, for changing the secret key of described call according to predeterminated frequency.
6. communication terminal as claimed in claim 5, is characterized in that, described replacing unit specifically for:
Control described call secret key generation unit to converse secret key according to predeterminated frequency and described preset algorithm stochastic generation;
Control described first transmitting element sends described stochastic generation to the described called end secret key of call by described network side;
Control described ciphering unit to be encrypted according to the call secret key pair dialog context of described predeterminated frequency and described stochastic generation;
And control described first transmitting element the dialog context encrypted according to the secret key of the call of described stochastic generation is sent to described called end by described network side.
7. a communication base station, is characterized in that, described communication base station comprises:
Receiving element, for receiving the call request comprising secret key of conversing that calling terminal sends and the dialog context encrypted according to the secret key of described call;
Second calling unit, for sending the call request comprising the secret key of described call to called end;
Second judging unit, for judging whether described called end receives described call request;
Second transmitting element, for sending to described called end by the dialog context of described encryption;
Retransmission unit, for forwarding the secret key of call that described calling terminal changes according to predeterminated frequency and the dialog context according to the secret key encryption of the call of described replacing.
8. communication base station as claimed in claim 7, is characterized in that, described retransmission unit specifically for:
Control described receiving element and receive described calling terminal according to the secret key of the call of predeterminated frequency stochastic generation, and according to the dialog context that the secret key of the call of described stochastic generation is encrypted;
Control described second transmitting element and send described calling terminal according to the secret key of the call of predeterminated frequency stochastic generation to described called end, and according to the dialog context that the secret key of the call of described stochastic generation is encrypted.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410366822.1A CN104113836B (en) | 2014-07-29 | 2014-07-29 | A kind of method of encryption of conversing, communication terminal and base station |
| PCT/CN2015/085413 WO2016015643A1 (en) | 2014-07-29 | 2015-07-29 | Call encryption method, communication terminal, base station and computer storage medium |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410366822.1A CN104113836B (en) | 2014-07-29 | 2014-07-29 | A kind of method of encryption of conversing, communication terminal and base station |
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| CN104113836A CN104113836A (en) | 2014-10-22 |
| CN104113836B true CN104113836B (en) | 2016-03-30 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104113836B (en) * | 2014-07-29 | 2016-03-30 | 努比亚技术有限公司 | A kind of method of encryption of conversing, communication terminal and base station |
| CN104640108A (en) * | 2015-01-28 | 2015-05-20 | 深圳市比维视创科技有限公司 | Terminal communication voice encryption method and system |
| CN105577673A (en) * | 2015-12-29 | 2016-05-11 | 深圳市瑞铭无限科技有限公司 | Data encryption method and data encryption server based on issuing encryption algorithm |
| CN106488047B (en) * | 2016-12-20 | 2020-08-11 | 惠州Tcl移动通信有限公司 | Call data transmission control method and system based on mobile terminal |
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| CN101159907A (en) * | 2007-11-20 | 2008-04-09 | 青岛海信移动通信技术股份有限公司 | Method and system of encrypting multimode mobile communication terminal |
| CN101909290A (en) * | 2010-08-25 | 2010-12-08 | 中兴通讯股份有限公司 | Method, system and mobile terminal for encrypting voice call |
| CN101917711A (en) * | 2010-08-25 | 2010-12-15 | 中兴通讯股份有限公司 | Mobile communication system and voice call encryption method thereof |
| CN103596169A (en) * | 2012-08-16 | 2014-02-19 | 中兴通讯股份有限公司 | Cluster system encryption terminal and encryption module communication method, system and terminal thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2763769B1 (en) * | 1997-05-21 | 1999-07-23 | Alsthom Cge Alcatel | METHOD FOR ALLOWING DIRECT ENCRYPTED COMMUNICATION BETWEEN TWO RADIO NETWORK TERMINALS AND CORRESPONDING STATION AND TERMINAL ARRANGEMENTS |
| CN1115924C (en) * | 1999-09-09 | 2003-07-23 | 深圳市中兴通讯股份有限公司 | Encryption method for mobile telephone |
| JP5326815B2 (en) * | 2009-05-26 | 2013-10-30 | 富士通株式会社 | Packet transmitting / receiving apparatus and packet transmitting / receiving method |
| CN104113836B (en) * | 2014-07-29 | 2016-03-30 | 努比亚技术有限公司 | A kind of method of encryption of conversing, communication terminal and base station |
-
2014
- 2014-07-29 CN CN201410366822.1A patent/CN104113836B/en active Active
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- 2015-07-29 WO PCT/CN2015/085413 patent/WO2016015643A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101159907A (en) * | 2007-11-20 | 2008-04-09 | 青岛海信移动通信技术股份有限公司 | Method and system of encrypting multimode mobile communication terminal |
| CN101909290A (en) * | 2010-08-25 | 2010-12-08 | 中兴通讯股份有限公司 | Method, system and mobile terminal for encrypting voice call |
| CN101917711A (en) * | 2010-08-25 | 2010-12-15 | 中兴通讯股份有限公司 | Mobile communication system and voice call encryption method thereof |
| CN103596169A (en) * | 2012-08-16 | 2014-02-19 | 中兴通讯股份有限公司 | Cluster system encryption terminal and encryption module communication method, system and terminal thereof |
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| CN104113836A (en) | 2014-10-22 |
| WO2016015643A1 (en) | 2016-02-04 |
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