CN105471899A - End-to-end voice encryption communication method and device for mobile terminals - Google Patents
End-to-end voice encryption communication method and device for mobile terminals Download PDFInfo
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- CN105471899A CN105471899A CN201511018156.3A CN201511018156A CN105471899A CN 105471899 A CN105471899 A CN 105471899A CN 201511018156 A CN201511018156 A CN 201511018156A CN 105471899 A CN105471899 A CN 105471899A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
- H04L63/0457—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload wherein the sending and receiving network entities apply dynamic encryption, e.g. stream encryption
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
- H04L63/0478—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload applying multiple layers of encryption, e.g. nested tunnels or encrypting the content with a first key and then with at least a second key
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- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Computer Hardware Design (AREA)
- Computing Systems (AREA)
- General Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Telephone Function (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention provides an end-to-end voice encryption communication method and an end-to-end voice encryption communication device for mobile terminals. The method comprises the following steps of A/D data collection, specifically including dividing input voice communication signals into voice frames with fixed length by A/D conversion; encryption, specifically including dynamically obtaining a key through operation of an access point, and then encrypting the voice frames; modulation, specifically including synthesizing encrypted data into voice signals by a modulator; vocoder processing and base station transmission, specifically including performing coding, encryption and other treatments on the synthesized voice signals by a mobile communication vocoder, after coding, sending to a base station by a terminal through a cell channel, and then transmitting to a receiving terminal by the base station; demodulation, specifically including demodulating the voice signals into encrypted voice frames by a demodulator; and decryption, specifically including decrypting the encrypted voice frames according to the algorithm and key appointed by two parties in an end-to-end manner. The end-to-end voice encryption communication method and device for mobile terminals is simple in structure, reasonable in design, capable of implementing based on the inherent coding/decoding and encryption algorithm of the mobile communication protocol, and low in distortion rate, and can pass through the voice data authenticity detection of the base station.
Description
Technical field
The present invention relates to the method and apparatus of the end-to-end voice encryption call of a kind of mobile terminal, belong to field of mobile communication.
Background technology
Along with the arrival of information age, various intelligent mobile terminal more and more has the function of original computer, and the safety issue of intelligent mobile terminal is more and more outstanding.The general-purpose operating system various back doors event occurs frequently, information-leakage, and call is ravesdropping, the swindle of pseudo-base station.High-end special user to have safety call, security system function the demand of intelligent mobile terminal more and more stronger.
Current existing encipherment scheme is encrypted based on AMR coding, it has been no longer voice signal after this signal encryption, voice signal authenticity can be detected in some standard base station, when detecting that non-speech audio directly refuses call, so such scheme is generally used for CDMA2000 standard, its ciphering process as shown in Figure 1.
Summary of the invention
The object of the invention is to overcome above shortcomings in prior art, and a kind of reasonable in design is provided, can carry out in the intrinsic encoding and decoding of mobile communication protocol and cryptographic algorithm basis, distortion rate is lower, and the method for the end-to-end voice encryption call of the mobile terminal that can be detected by the speech data authenticity of base station.
The present invention's adopted technical scheme that solves the problem is: the method for the end-to-end voice encryption call of this mobile terminal, and step is as follows:
1) A/D data acquisition: transformed through A/D by the voice call signal of input, through pcm encoder, according to mobile communication standard, is divided into the speech frame of fixing duration;
2) encrypt: dynamically obtain key by access station (AP) computing, then key is sent to ciphering unit and speech frame is encrypted;
3) modulate: according to key parameter design modulators such as pure and impure judgement, gain, fundamental frequency, speech synthesis filter coefficients, enciphered data is synthesized voice signal;
4) vocoder process and base-station transmission: the process such as mobile communication vocoder is encoded to the voice signal synthesized, encryption, by being sent to base station by terminal after cell chnnel coding, then by base-station transmission to receiving terminal;
5) demodulation: the voice signal received is demodulated into encrypted speech frame by demodulator;
6) decipher: be decrypted according to the encrypted speech frame after the algorithm of the end-to-end agreement of both sides and double secret key demodulation, the data after deciphering are real call voice.
The present invention is applicable to 2G, 3G, 4G, LTE voice (VoLTE) call.
The end-to-end voice encryption communicator of a kind of mobile terminal, it is characterized in that, described device comprises: ciphering terminal, for being encrypted voice call signal, and synthetic speech signal;
First base station, for accepting the voice signal of ciphering terminal, and transmits voice signal;
Core net, for managing the voice signal of the first base station;
Second base station, for transmitting the voice signal of core net;
Receiving terminal, for accepting the voice signal of the second base station and deciphering as real calling record.
Ciphering terminal of the present invention comprises an A/D converter for voice call signal being converted to speech frame, be used for dynamically obtaining key and the encrypting module be encrypted speech frame, the first modulator-demodulator being used for the enciphered data that encrypting module is formed to synthesize voice signal and being used for are encoded to voice signal and the first vocoder of encryption, and the first vocoder carries out cell chnnel coding to voice signal.
Receiving terminal of the present invention comprise for voice signal is encoded and decipher and export voice signal the second vocoder, for the voice signal of the second vocoder is demodulated into encrypted speech frame second modem, be used for the decryption unit that is decrypted by speech frame and be used for the second A/D converter that the speech frame after by deciphering is converted to voice call signal.
Encrypting module of the present invention comprises access station and ciphering unit, and access station dynamically obtains key by computing, and ciphering unit is encrypted speech frame.
The present invention compared with prior art, have the following advantages and effect: structure is simple, reasonable in design, the call of mobile communication terminal end-by-end security secret can be supported under existing hardware condition or when increasing encryption chip, add the anti-eavesdrop on the privacy of communication and link, and breach mobile base station to Speech signal detection, breach the restriction of various standard agreement.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of prior art.
Fig. 2 is the structural representation of the end-to-end voice encryption communicator of mobile terminal in the present embodiment.
Fig. 3 is the structural representation of encrypting module.
Embodiment
Below in conjunction with accompanying drawing, also by embodiment, the present invention is described in further detail, and following examples are explanation of the invention and the present invention is not limited to following examples.
Embodiment 1.
See Fig. 2 to Fig. 3, the method for the end-to-end voice encryption call of mobile terminal of the present embodiment, step is as follows:
1) A/D data acquisition: transformed through A/D by the voice call signal of input, through pcm encoder, according to mobile communication standard, is divided into the speech frame of fixing duration;
2) encrypt: dynamically obtain key by access station 121 (AP) computing, then key is sent to ciphering unit 122 pairs of speech frames and is encrypted;
3) modulate: according to key parameter design modulators such as pure and impure judgement, gain, fundamental frequency, speech synthesis filter coefficients, enciphered data is synthesized voice signal;
4) vocoder process and base-station transmission: the process such as mobile communication vocoder is encoded to the voice signal synthesized, encryption, by being sent to base station by terminal after cell chnnel coding, then by base-station transmission to receiving terminal 4;
5) demodulation: the voice signal received is demodulated into encrypted speech frame by demodulator;
6) decipher: be decrypted according to the encrypted speech frame after the algorithm of the end-to-end agreement of both sides and double secret key demodulation, the data after deciphering are real call voice.
The present embodiment can realize the call of safety secret, add the anti-eavesdrop on the privacy of communication and link, voice call signal is converted to speech frame by the present embodiment, and speech frame is encrypted, the speech frame encrypted of being in synthesizes voice signal, so, by the detection of base station to voice signal.
The present embodiment is applicable to 2G, 3G, 4G, LTE voice (VoLTE) call.
The end-to-end voice encryption communicator of a kind of mobile terminal, comprising:
Ciphering terminal 1, for being encrypted voice call signal, and synthetic speech signal;
First base station 2, for accepting the voice signal of ciphering terminal 1, and transmits voice signal;
Core net 5, for managing the voice signal of the first base station 2;
Second base station 3, for transmitting the voice signal of core net 5;
Receiving terminal 4, for accepting the voice signal of the second base station 3 and deciphering as real calling record.
Ciphering terminal 1 in the present embodiment comprises an A/D converter 11 for voice call signal being converted to speech frame, be used for dynamically obtaining key and the encrypting module 12, the first modulator-demodulator 13 being used for the enciphered data that encrypting module 12 is formed to synthesize voice signal that are encrypted speech frame and being used for is encoded to voice signal and the first vocoder 14, first vocoder 14 pairs of voice signals of encryption carry out cell chnnel coding.
Receiving terminal 4 in the present embodiment comprise for voice signal is encoded and decipher and export voice signal the second vocoder 41, for the voice signal of the second vocoder 41 is demodulated into encrypted speech frame second modem 42, be used for the decryption unit 43 that is decrypted by speech frame and be used for the second A/D converter 44 that the speech frame after by deciphering is converted to voice call signal.
Encrypting module 12 in the present embodiment comprises access station 121 and ciphering unit 122, and access station 121 dynamically obtains key by computing, and ciphering unit 122 pairs of speech frames are encrypted.
Above content described in this specification is only made for the present invention illustrating.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment; only otherwise depart from the content of specification of the present invention or surmount this scope as defined in the claims, protection scope of the present invention all should be belonged to.
Claims (6)
1. a method for the end-to-end voice encryption call of mobile terminal, step is as follows:
1) A/D data acquisition: transformed through A/D by the voice call signal of input, through pcm encoder, according to mobile communication standard, is divided into the speech frame of fixing duration;
2) encrypt: dynamically obtain key by access station (AP) computing, then key is sent to ciphering unit and speech frame is encrypted;
3) modulate: according to key parameter design modulators such as pure and impure judgement, gain, fundamental frequency, speech synthesis filter coefficients, enciphered data is synthesized voice signal;
4) vocoder process and base-station transmission: the process such as mobile communication vocoder is encoded to the voice signal synthesized, encryption, by being sent to base station by terminal after cell chnnel coding, then by base-station transmission to receiving terminal;
5) demodulation: the voice signal received is demodulated into encrypted speech frame by demodulator;
6) decipher: be decrypted according to the encrypted speech frame after the algorithm of the end-to-end agreement of both sides and double secret key demodulation, the data after deciphering are real call voice.
2. the method for the end-to-end voice encryption call of mobile terminal according to claim 1, is characterized in that: the method is applicable to 2G, 3G, 4G, LTE voice (VoLTE) call.
3. the end-to-end voice encryption communicator of mobile terminal, it is characterized in that, described device comprises: ciphering terminal, for being encrypted voice call signal, and synthetic speech signal;
First base station, for accepting the voice signal of ciphering terminal, and transmits voice signal;
Core net, for managing the voice signal of the first base station;
Second base station, for transmitting the voice signal of core net;
Receiving terminal, for accepting the voice signal of the second base station and deciphering as real calling record.
4. the end-to-end voice encryption communicator of mobile terminal according to claim 3, it is characterized in that: described ciphering terminal comprises an A/D converter for voice call signal being converted to speech frame, be used for dynamically obtaining key and the encrypting module be encrypted speech frame, the first modulator-demodulator being used for the enciphered data that encrypting module is formed to synthesize voice signal and being used for are encoded to voice signal and the first vocoder of encryption, the first vocoder carries out cell chnnel coding to voice signal.
5. the end-to-end voice encryption communicator of the mobile terminal according to claim 3 or 4, is characterized in that: described receiving terminal comprise for voice signal is encoded and decipher and export voice signal the second vocoder, for the voice signal of the second vocoder is demodulated into encrypted speech frame second modem, be used for the decryption unit that is decrypted by speech frame and be used for the second A/D converter that the speech frame after by deciphering is converted to voice call signal.
6. the method for the end-to-end voice encryption call of mobile terminal according to claim 4, is characterized in that: described encrypting module comprises access station and ciphering unit, and access station dynamically obtains key by computing, and ciphering unit is encrypted speech frame.
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| CN201511018156.3A CN105471899A (en) | 2015-12-30 | 2015-12-30 | End-to-end voice encryption communication method and device for mobile terminals |
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| CN201511018156.3A CN105471899A (en) | 2015-12-30 | 2015-12-30 | End-to-end voice encryption communication method and device for mobile terminals |
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| CN106024000A (en) * | 2016-05-23 | 2016-10-12 | 苏州大学 | End-to-end voice encryption and decryption method based on frequency spectrum mapping |
| CN106098073A (en) * | 2016-05-23 | 2016-11-09 | 苏州大学 | A kind of end-to-end speech encrypting and deciphering system mapping based on frequency spectrum |
| CN106790281A (en) * | 2017-02-23 | 2017-05-31 | 深圳市沃阳精密科技有限公司 | A kind of end-to-end voice encryption device and encryption method towards intercom system |
| CN107733833A (en) * | 2016-08-10 | 2018-02-23 | 中国电信股份有限公司 | A kind of CDMA and the voice intercommunication method and system of VoLTE terminals |
| CN108111492A (en) * | 2017-12-11 | 2018-06-01 | 广州三星通信技术研究有限公司 | For the method and its electric terminal of the protection call voice of electric terminal |
| CN108429851A (en) * | 2018-01-26 | 2018-08-21 | 大唐终端技术有限公司 | A kind of method and device of cross-platform information source voice encryption |
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Application publication date: 20160406 |