CN1592141A - Terminal to terminal encryption method of cell phone voice and data - Google Patents
Terminal to terminal encryption method of cell phone voice and data Download PDFInfo
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- CN1592141A CN1592141A CNA2004100216888A CN200410021688A CN1592141A CN 1592141 A CN1592141 A CN 1592141A CN A2004100216888 A CNA2004100216888 A CN A2004100216888A CN 200410021688 A CN200410021688 A CN 200410021688A CN 1592141 A CN1592141 A CN 1592141A
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Abstract
This invention discloses an end-to-end ciphering method for GSM network voice and data when mobile stations carry out voice/data communication between them, voice/data information sent by the delivery end are coded and ciphered by an outboard terminal security device to be delivered to the blue tooth mobile station of the delivery end by its channel, the out board device is connected with GSM mobile station supporting the blue tooth data communication function to realize the end-to-end ciphering of GSM network voice and data service.
Description
Affiliated technical field:
The present invention relates to the mobile communication secrecy technology, particularly relate to the End to End Encryption method of a kind of GSM network voice and data.
Background technology:
GSM (Global System for Mobile Communication global system for mobile communications) is the cellular mobile communication standard of being formulated by ETSI (ETSI) based on time division multiple access way (TDMA), business such as speech, data, short message and WAP online can be provided, take the lead in being applied in China and Europe, and obtained howling success.Most cities and towns, the whole nation of China GSM network-covered are at present used very extensive.
Travelling carriage is the subscriber terminal equipment of GSM network, can be divided into hand-hold type (mobile phone), portable and vehicular etc., and travelling carriage inserts the GSM network by the base station sub-system (BSS) of GSM.In the GSM network, adopt communication between travelling carriage and base station (BS), the confidentiality of communication is relatively poor.For the information security that guarantees to communicate by letter, need to adopt method of encrypting that information transmitted is carried out encipherment protection.Cordless communication network generally adopts air-interface encryption and End to End Encryption dual mode.Air-interface encryption is to the information encryption on the wireless channel between travelling carriage and base station protection, but information encipherment protection not in terrestrial transmission equipment is eavesdropped easily.End to End Encryption carries out encipherment protection to the information on the whole link from the transmitting terminal to the receiving terminal, and fail safe is higher.
The GSM standard is supported air-interface encryption, but does not support End to End Encryption, and the implementation method that GSM network voice and data are carried out End to End Encryption all needed to increase the dedicated secret module in travelling carriage in the past, and needed transform the structure and the software of travelling carriage.Raising along with integrated circuit technology level and cellphone subscriber's demand, the external form of mobile phone is more and more littler, and the external form of different model mobile phone has nothing in common with each other, and the internal control mode is also different, make the difficulty that on mobile phone, increases security module improve greatly, and the versatility of security module is also relatively poor.
Chinese patent application number is that 98108859.7 invention has proposed a kind of new communication encryption method.This method is to the effect that: the random number that calling party's terminal utilizes network to send generates encryption key, this encryption key sends to callee's terminal by call setup message, makes two end subscribers can use identical key that call-information is carried out enciphering/deciphering when communication.Chinese patent application number is 99117599.9 disclosure of the Invention a kind of based on the GSM data service, can be applicable to the method for the mobile phone cipher of the communication system that all meet the GSM standard.This method is to the effect that: the calling party initiates data service calls; The either party provides and generates the required data of key, and transmits this data; Both sides generate key, and are stored in separately the memory; Voice messaging is carried out encryption, emission or/and the information that receives the other side is decrypted processing and reverts to voice.This invention solved Chinese patent application number be exist in 98108859.7 the encryption method for handsets because Virtual network operator is known the unsafe problems that key information causes.The common feature of above-mentioned two patents is that all needing increases the dedicated secret module in mobile phone, and needs the structure and the software of mobile phone are transformed.
Bluetooth technology (Blue Tooth) is in order to satisfy people in the wireless interconnected proposition of individual operating space, the equipment that its adopts frequency hopping to make and is in individual operating space forms a wireless personal domain network, really between the realization equipment movably, interconnected automatically.Bluetooth technology is just developing into the standard of personal area network or short-distance radio network.Existing a lot of GSM mobile handset are supported bluetooth speeches and data communication function, adopt Bluetooth technology can realize wireless connections between microphone, microphone and the data terminal of GSM mobile handset and outer handset.
Summary of the invention:
The End to End Encryption method that the purpose of this invention is to provide a kind of GSM network voice and data service, this method only need increase a general external terminal security device (not needing travelling carriage is transformed), external terminal security device is connected with the GSM travelling carriage of supporting the bluetooth data communication function by Bluetooth technology, can realize the End to End Encryption of GSM network voice and data service.Simultaneously, all carry out encipherment protection by speech, the data of bluetooth channel transmission between external terminal security device and the bluetooth GSM travelling carriage, had higher fail safe.When travelling carriage and mobile communications, communicating pair all adopts terminal security device and bluetooth GSM travelling carriage to carry out wireless connections, realizes the End to End Encryption of GSM network voice and data service.
Concrete technology of the present invention is as follows:
The End to End Encryption method of GSM network voice and data, it is characterized in that: when travelling carriage and travelling carriage carry out voice, after the external terminal security device of the voice/data information via that transmitting terminal sends carries out speech coding and encryption, send to the bluetooth travelling carriage of transmitting terminal by the blue-teeth data channel, voice/data signal after will being encrypted by this bluetooth travelling carriage is sent to the bluetooth travelling carriage of receiving terminal by the data channel of GSM network, the bluetooth travelling carriage of receiving terminal sends to the encrypted voice/data-signal that receives the external terminal security device of receiving terminal by the blue-teeth data channel, and be decrypted by the external terminal security device of receiving terminal, speech information after the deciphering is carried out being reduced to speech after the speech decoding processing, the data message after the deciphering is sent to data terminal by data-interface.
External terminal security device of the present invention and the bluetooth travelling carriage supporting with it are realized wireless connections by the blue-teeth data channel, do not need to carry out wired connection between the two.
Concrete grammar of the present invention is as follows:
The method of End to End Encryption is as follows when carrying out speech and data communication between travelling carriage of the present invention and travelling carriage:
A. dispose a bluetooth travelling carriage and external terminal security device respectively calling party and callee, external terminal security device is made up of calling party's terminal security device and callee's terminal security device, place calling party and callee respectively, terminal security device and bluetooth travelling carriage are realized wireless connections by the blue-teeth data channel;
B. initiate data service calls by the calling party, set up data calling party and callee and be connected;
C. at transmitting terminal, speech is or/and the enciphered message that data generate after the terminal security device is encrypted, send to the bluetooth travelling carriage of transmitting terminal by the blue-teeth data channel,, enciphered message is transferred to the bluetooth travelling carriage of receiving terminal by the data channel of bluetooth travelling carriage by GSM;
D. the bluetooth travelling carriage of receiving terminal is sent to the terminal security device of receiving terminal with the enciphered message that receives by the blue-teeth data channel, by being reduced to speech or/and data after the deciphering of terminal security device;
Speech, the data message of communicating by letter between calling party's terminal security device E. of the present invention and callee's terminal security device have all carried out encipherment protection (comprising on-air radio channel and GSM ground wire transmission channel between wireless channel, bluetooth travelling carriage and the base station between terminal security device and bluetooth travelling carriage);
F. encryption method of the present invention adopts the symmetric key cipher system, i.e. calling party's terminal security device is all identical with key with the cryptographic algorithm that callee's terminal security device adopts, and can guarantee the correct encryption and decryption of speech and data like this.
The detailed process of End to End Encryption may further comprise the steps when carrying out speech and data communication between travelling carriage of the present invention and travelling carriage:
A. for carrying out external terminal security device of each bluetooth travelling carriage configuration of End to End Encryption transmission, terminal security device and bluetooth travelling carriage are realized wireless connections by the blue-teeth data channel;
B. initiate data service calls by the calling party, set up data calling party and callee and be connected;
C. at transmitting terminal, when carrying out Speech Communication, speech is after the microphone of the terminal security device of transmitting terminal picks up, at first carry out the A/D conversion, send into voice compression/decompression module then and compress processing, send into the encryption and decryption module encrypt again, the encrypted voice signal that generates is by the blue tooth interface of the terminal security device of transmitting terminal, utilize the blue-teeth data channel to send to the bluetooth travelling carriage of transmitting terminal, the bluetooth travelling carriage of transmitting terminal is with the data channel of encrypted voice signal by GSM, through the bluetooth travelling carriage of GSM Network Transmission to receiving terminal; When carrying out data communication, data are sent into the encryption and decryption module encrypt by data terminal through the data interface module of the terminal security device of transmitting terminal, the encrypted data signal that generates is by the blue tooth interface of the terminal security device of transmitting terminal, utilize the blue-teeth data channel to send to the bluetooth travelling carriage of transmitting terminal, the bluetooth travelling carriage of transmitting terminal is with the data channel of encrypted data signal by GSM, through the bluetooth travelling carriage of GSM Network Transmission to receiving terminal;
D. at receiving terminal, when carrying out Speech Communication, the bluetooth travelling carriage will be sent to the terminal security device of receiving terminal by the encrypted voice signal that the GSM network receives by the blue-teeth data channel, terminal security device by receiving terminal receives by blue tooth interface, send into the encryption and decryption module decrypts of terminal security device then, send into voice compression/decompression module again and carry out decompression, after be reduced to analogue voice signal after the D/A conversion; When carrying out data communication, the bluetooth travelling carriage will be sent to the terminal security device of receiving terminal by the encrypted data signal that the GSM network receives by the blue-teeth data channel, terminal security device by receiving terminal receives by blue tooth interface, send into the encryption and decryption module decrypts of terminal security device then, after the data interface module of terminal security device sends to data terminal.
Terminal security device of the present invention, at least be made up of blue tooth interface module, encryption and decryption module, voice compression/decompression module, A/D, D/A module, data interface module and control module, it is characterized in that: the blue tooth interface module is finished the wireless connections between terminal security device and bluetooth travelling carriage; The encryption and decryption module is connected respectively with voice compression/decompression module, blue tooth interface module, data interface module, finishes the encryption/decryption process of speech and data-signal; A/D, D/A module are connected with voice compression/decompression module, finish mould/number, D/A switch and the compression/decompression processes of speech; Data interface module is finished the level conversion between terminal security device and data terminal; Control module is connected respectively with blue tooth interface module, encryption and decryption module, voice compression/decompression module, A/D, D/A module, finishes the various controls to the terminal security device.
Terminal security device of the present invention is provided with Keysheet module and display module, and Keysheet module is realized the input of various subscriber control informations, and display module is realized the demonstration of various state informations.
Adopt described method of the present invention, need not the bluetooth travelling carriage with bluetooth data communication function is transformed, just can realize speech, data end-to-end encrypted communication between travelling carriage and user of mobile station, speech, data-signal by the blue-teeth data Channel Transmission between terminal security device and bluetooth travelling carriage have also carried out encryption, have fail safe preferably; Same terminal security device can reduce exploitation and producing cost greatly applicable to the bluetooth travelling carriage of different model, and the user is strong to the flexibility of mobile station in selecting, easy to use simultaneously, has market popularization value preferably, can produce favorable economic benefit.
Accompanying drawing and drawing explanation:
The secure communication process schematic diagram of Fig. 1 travelling carriage of the present invention and travelling carriage End to End Encryption;
Fig. 2 terminal security device of the present invention composition frame chart
Wherein, 1 is bluetooth channel, and 2 is data terminal, and 3 is microphone, and 4 is earphone, and 5 are the terminal security device, and 6 is bluetooth GSM travelling carriage.
Embodiment:
Terminal security device of the present invention, at least be made up of blue tooth interface module, encryption and decryption module, voice compression/decompression module, A/D, D/A module, data interface module and control module, it is characterized in that: the blue tooth interface module is finished the wireless connections between terminal security device and bluetooth travelling carriage; The encryption and decryption module is connected respectively with voice compression/decompression module, blue tooth interface module, data interface module, finishes the encryption/decryption process of speech and data-signal; A/D, D/A module are connected with voice compression/decompression module, finish mould/number, D/A switch and the compression/decompression processes of speech; Data interface module is finished being connected between terminal security device and data terminal; Control module is finished the various controls to the terminal security device.
Terminal security device of the present invention is provided with Keysheet module and display module, and Keysheet module is realized the input of various subscriber control informations, and display module is realized the demonstration of various state informations.
Further describe the composition and the function of each parts of terminal security device 5 below:
A/D, D/A module adopt the monolithic integrated circuit that integrates A/D, D/A conversion and voice encoding/decoding function to realize, to reduce the printed board size, dwindle the machine volume of terminal security device 5.The A/D that A/D, D/A module are finished the analogue voice signal that picks up by microphone 3 at transmitting terminal changes and the speech coding function, finishes speech decoding and D/A translation function at receiving terminal, gives earphone 4 with the analogue voice signal that restores.
Data interface module adopts Transistor-Transistor Logic level and RS232 level conversion integrated circuit to realize.Data interface module is finished data terminal 2 to the conversion of the signal level of terminal security device 5 inner encryption and decryption modules (from the RS232 level to Transistor-Transistor Logic level) at transmitting terminal; Finish terminal security device 5 inner encryption and decryption modules to the conversion of the signal level of data terminal 2 (from Transistor-Transistor Logic level to the RS232 level) at receiving terminal.
Voice compression/decompression module adopts special-purpose low rate Realization of Vocoder.Voice compression/decompression module is encoded to analogue voice signal and is compressed processing at transmitting terminal, and voice signal speed and GSM data channel speed after the compression are suitable; Decompress and decoding processing at the plaintext low rate voice signal of receiving terminal, and give earphone 4 analogue voice signal that restores to deciphering output.
The compressed voice signal that the encryption and decryption module is exported voice compression/decompression module at transmitting terminal carries out encryption, and the data-signal that the data interface module is received carries out encryption, and encrypted voice, data-signal is delivered to the blue tooth interface module launch; At receiving terminal encrypted voice and the data-signal that the blue tooth interface module receives is decrypted processing, the plaintext voice signal sent into voice compression/decompression module carry out speech decompression and decoding, restore analogue voice signal; The clear data signal is delivered to data terminal through data interface module.
The blue tooth interface module adopts the general bluetooth module that meets Bluetooth specification to realize.The blue tooth interface module is modulated the encrypted voice of encryption and decryption module output and data-signal and is launched at transmitting terminal, is received by the blue teeth wireless data channel by the bluetooth travelling carriage; Receive encrypted voice and the data-signal that the bluetooth travelling carriage by receiving terminal sends by the blue teeth wireless data channel at receiving terminal, and deliver to the encryption and decryption module and be decrypted processing.
Power module provides working power for each module of terminal security device 5.The terminal security device adopts powered battery, and adopts the DC/DC conversion integrated circuit, finishes the conversion from cell voltage to each module operating voltage.
Control module is made up of central processing unit (CPU) and peripheral circuit, be responsible for coordinating, controlling the work schedule of each module, as: the framing of data and branch frame, encryption and decryption control, voice compression/decompression control, blue tooth interface control, state information demonstration and keyboard detection etc.
Keysheet module also can manually be imported short message except having input of the user profile of reception and function selecting function.Keysheet module is made up of keyboard and keyboard coding chip, and the keyboard codec chip is responsible for finishing the encoding and decoding of button, and keyboard has 0-9, * and # totally 12 buttons, and keypress function is a multiplex mode, can finish the input of 0-9, *, # and 26 English alphabets.
The work at present state of display module display terminal privacy device also can show short message.Display module is made up of LCD and peripheral circuit, receives all kinds of display message that control module transmits, the control of the controlled module of its display mode.
Below GSM network voice and the end-to-end encrypted process of data are specifically described.The end-to-end ciphering process of concrete speech and data may further comprise the steps:
A. dispose a bluetooth travelling carriage 6, external calling party's terminal security device 5 and external callee's terminal security device 5 respectively calling party and callee, terminal security device 5 is realized wireless connections with bluetooth travelling carriage 6 by the blue-teeth data channel;
B. initiate data service calls by the calling party, set up data calling party and callee and be connected;
C. at transmitting terminal, voice signal carries out the A/D conversion after the microphone 3 of the terminal security device 5 of transmitting terminal picks up, after voice compression/decompression module is encoded and is compressed processing, send into the encryption and decryption module encrypt, the encrypted voice signal that generates is by the blue tooth interface of the terminal security device 5 of transmitting terminal, send to the bluetooth travelling carriage 6 of transmitting terminal through bluetooth channel 1, bluetooth travelling carriage 6 is with the data channel of encrypted voice signal by GSM, through the bluetooth travelling carriage 6 of GSM Network Transmission to receiving terminal; Data-signal is sent into the encryption and decryption module encrypt from data terminal 2 through the data interface module of the terminal security device 5 of transmitting terminal, the encrypted data signal that generates is by the blue tooth interface of the terminal security device 5 of transmitting terminal, send to the bluetooth travelling carriage 6 of transmitting terminal through bluetooth channel 1, bluetooth travelling carriage 6 is with the data channel of encrypted data signal by GSM, through the bluetooth travelling carriage 6 of GSM Network Transmission to receiving terminal;
C. at receiving terminal, bluetooth travelling carriage 6 is with the encrypted voice that receives, data-signal is sent to receiving terminal by bluetooth channel 1 terminal security device 5, terminal security device 5 by receiving terminal receives by blue tooth interface, send into the encryption and decryption module then and be decrypted processing, expressly voice signal sends into that voice compression/decompression module decompresses and decoding processing, after restore analogue voice signal after the D/A conversion; The clear data signal is sent into data terminal through data interface module;
D. calling party's terminal security device 5 is all identical with key with the cryptographic algorithm that callee's terminal security device 5 adopts, and can guarantee the correct encryption and decryption of speech and data like this.
Most technology of the present invention concerning those skilled in the art all be know and be easy to realize, in the implementation process of reality, can selectively dispose as required.For example, if do not use the data encryption business, can be with the data interface module deletion of terminal security device 5; If do not use the voice encryption business, can be with A/D, D/A module and the voice compression/decompression module deletion of terminal security device 5; Earphone 4 is replaced with loud speaker; With microphone 3 and earphone 4 together or one of them is placed inside of terminal security device 5 etc.
The present invention is not only applicable to bluetooth GSM travelling carriage, for other communication terminal with bluetooth data communication function, and same being suitable for.
Claims (4)
1, the End to End Encryption method of a kind of GSM network voice and data, it is characterized in that: when travelling carriage and travelling carriage carry out voice, after the external terminal security device of the voice/data information via that transmitting terminal sends carries out speech coding and encryption, send to the bluetooth travelling carriage of transmitting terminal by the blue-teeth data channel, voice/data signal after will being encrypted by this bluetooth travelling carriage is sent to the bluetooth travelling carriage of receiving terminal by the data channel of GSM network, the bluetooth travelling carriage of receiving terminal sends to the encrypted voice/data-signal that receives the external terminal security device of receiving terminal by the blue-teeth data channel, and be decrypted by the external terminal security device of receiving terminal, speech information after the deciphering is carried out being reduced to speech after the speech decoding processing, the data message after the deciphering is sent to data terminal by data-interface.
2, the End to End Encryption method of GSM network voice according to claim 1 and data is characterized in that: the method for End to End Encryption is as follows when carrying out speech and data communication between described travelling carriage and travelling carriage:
A. dispose a bluetooth travelling carriage and external terminal security device respectively calling party and callee, external terminal security device is made up of calling party's terminal security device and callee's terminal security device, place calling party and callee respectively, terminal security device and bluetooth travelling carriage are realized wireless connections by the blue-teeth data channel;
B. initiate data service calls by the calling party, set up data calling party and callee and be connected;
C. at transmitting terminal, speech is or/and the enciphered message that data generate after the terminal security device is encrypted, send to the bluetooth travelling carriage of transmitting terminal by the blue-teeth data channel,, enciphered message is transferred to the bluetooth travelling carriage of receiving terminal by the data channel of bluetooth travelling carriage by GSM;
D. the bluetooth travelling carriage of receiving terminal is sent to the terminal security device of receiving terminal with the enciphered message that receives by the blue-teeth data channel, by being reduced to speech or/and data after the deciphering of terminal security device;
Speech, the data message of communicating by letter between calling party's terminal security device E. of the present invention and callee's terminal security device have all carried out encipherment protection;
F. encryption method of the present invention adopts the symmetric key cipher system, i.e. calling party's terminal security device is all identical with key with the cryptographic algorithm that callee's terminal security device adopts.
3, the End to End Encryption method of GSM network voice according to claim 1 and data is characterized in that: the detailed process of End to End Encryption may further comprise the steps when carrying out speech and data communication between described travelling carriage and travelling carriage:
A. for carrying out external terminal security device of each bluetooth travelling carriage configuration of End to End Encryption transmission, terminal security device and bluetooth travelling carriage are realized wireless connections by the blue-teeth data channel;
B. initiate data service calls by the calling party, set up data calling party and callee and be connected;
C. at transmitting terminal, when carrying out Speech Communication, speech is after the microphone of the terminal security device of transmitting terminal picks up, at first carry out the A/D conversion, send into voice compression/decompression module then and compress processing, send into the encryption and decryption module encrypt again, the encrypted voice signal that generates is by the blue tooth interface of the terminal security device of transmitting terminal, utilize the blue-teeth data channel to send to the bluetooth travelling carriage of transmitting terminal, the bluetooth travelling carriage of transmitting terminal is with the data channel of encrypted voice signal by GSM, through the bluetooth travelling carriage of GSM Network Transmission to receiving terminal; When carrying out data communication, data are sent into the encryption and decryption module encrypt by data terminal through the data interface module of the terminal security device of transmitting terminal, the encrypted data signal that generates is by the blue tooth interface of the terminal security device of transmitting terminal, utilize the blue-teeth data channel to send to the bluetooth travelling carriage of transmitting terminal, the bluetooth travelling carriage of transmitting terminal is with the data channel of encrypted data signal by GSM, through the bluetooth travelling carriage of GSM Network Transmission to receiving terminal;
D. at receiving terminal, when carrying out Speech Communication, the bluetooth travelling carriage will be sent to the terminal security device of receiving terminal by the encrypted voice signal that the GSM network receives by the blue-teeth data channel, terminal security device by receiving terminal receives by blue tooth interface, send into the encryption and decryption module decrypts of terminal security device then, send into voice compression/decompression module again and carry out decompression, after be reduced to analogue voice signal after the D/A conversion; When carrying out data communication, the bluetooth travelling carriage will be sent to the terminal security device of receiving terminal by the encrypted data signal that the GSM network receives by the blue-teeth data channel, terminal security device by receiving terminal receives by blue tooth interface, send into the encryption and decryption module decrypts of terminal security device then, after the data interface module of terminal security device sends to data terminal.
4, the End to End Encryption method of GSM network voice according to claim 1 and data, it is characterized in that: described terminal security device, at least be made up of blue tooth interface module, encryption and decryption module, voice compression/decompression module, A/D, D/A module, data interface module and control module, it is characterized in that: the blue tooth interface module is finished the wireless connections between terminal security device and bluetooth travelling carriage; The encryption and decryption module is connected respectively with voice compression/decompression module, blue tooth interface module, data interface module, finishes the encryption/decryption process of speech and data-signal; A/D, D/A module are connected with voice compression/decompression module, finish mould/number, D/A switch and the compression/decompression processes of speech; Data interface module is finished the level conversion between terminal security device and data terminal; Control module is connected respectively with blue tooth interface module, encryption and decryption module, voice compression/decompression module, A/D, D/A module, finishes the various controls to the terminal security device.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2004100216888A CN1592141A (en) | 2004-01-17 | 2004-01-17 | Terminal to terminal encryption method of cell phone voice and data |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2004100216888A CN1592141A (en) | 2004-01-17 | 2004-01-17 | Terminal to terminal encryption method of cell phone voice and data |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101674107A (en) * | 2009-08-13 | 2010-03-17 | 上海酷吧信息技术有限公司 | Method for transmitting encrypted electronic coupons by using Bluetooth |
| CN101014060B (en) * | 2007-02-02 | 2010-05-19 | 东南大学 | Voice encryption method for GSM handset with anti longterm prediction rule pulse excitation compression coding |
| CN102075321A (en) * | 2010-11-24 | 2011-05-25 | 东南大学 | Mobile communication end-to-end voice encryption Bluetooth handheld device and voice encryption method |
| CN102137394A (en) * | 2011-03-10 | 2011-07-27 | 中国科学院上海微系统与信息技术研究所 | Encrypted mobile communication terminal system and method under network access |
| CN101287274B (en) * | 2007-04-11 | 2012-07-04 | 深圳市维信联合科技有限公司 | Voice encryption system for mobile communication and encryption method thereof |
| CN103379486A (en) * | 2013-06-08 | 2013-10-30 | 山东量子科学技术研究院有限公司 | Plug and play type portable communication secrecy device and communication method thereof |
| CN103888629A (en) * | 2012-12-21 | 2014-06-25 | 中国电子科技集团公司第五十研究所 | Device for carrying out voice compression/meeting exchange processing on PCM voice |
| CN104917753A (en) * | 2015-05-04 | 2015-09-16 | 北京奇艺世纪科技有限公司 | Method and system for communication based on symmetric keys |
| CN113242538A (en) * | 2021-05-11 | 2021-08-10 | 深圳市创意者科技有限公司 | Communication voice information encryption system of Bluetooth conference sound box |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101014060B (en) * | 2007-02-02 | 2010-05-19 | 东南大学 | Voice encryption method for GSM handset with anti longterm prediction rule pulse excitation compression coding |
| CN101287274B (en) * | 2007-04-11 | 2012-07-04 | 深圳市维信联合科技有限公司 | Voice encryption system for mobile communication and encryption method thereof |
| CN101674107A (en) * | 2009-08-13 | 2010-03-17 | 上海酷吧信息技术有限公司 | Method for transmitting encrypted electronic coupons by using Bluetooth |
| CN102075321A (en) * | 2010-11-24 | 2011-05-25 | 东南大学 | Mobile communication end-to-end voice encryption Bluetooth handheld device and voice encryption method |
| CN102075321B (en) * | 2010-11-24 | 2013-01-02 | 东南大学 | Mobile communication end-to-end voice encryption Bluetooth handheld device and voice encryption method |
| CN102137394A (en) * | 2011-03-10 | 2011-07-27 | 中国科学院上海微系统与信息技术研究所 | Encrypted mobile communication terminal system and method under network access |
| CN103888629A (en) * | 2012-12-21 | 2014-06-25 | 中国电子科技集团公司第五十研究所 | Device for carrying out voice compression/meeting exchange processing on PCM voice |
| CN103379486A (en) * | 2013-06-08 | 2013-10-30 | 山东量子科学技术研究院有限公司 | Plug and play type portable communication secrecy device and communication method thereof |
| CN103379486B (en) * | 2013-06-08 | 2016-12-28 | 山东量子科学技术研究院有限公司 | A kind of instant inserted and instant using type portable call privacy device and communication means thereof |
| CN104917753A (en) * | 2015-05-04 | 2015-09-16 | 北京奇艺世纪科技有限公司 | Method and system for communication based on symmetric keys |
| CN104917753B (en) * | 2015-05-04 | 2018-07-10 | 北京奇艺世纪科技有限公司 | A kind of method and system to be communicated based on symmetric key |
| CN113242538A (en) * | 2021-05-11 | 2021-08-10 | 深圳市创意者科技有限公司 | Communication voice information encryption system of Bluetooth conference sound box |
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