CN202050421U - End-to-end encrypted speech processing device - Google Patents
End-to-end encrypted speech processing device Download PDFInfo
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- CN202050421U CN202050421U CN2010205386513U CN201020538651U CN202050421U CN 202050421 U CN202050421 U CN 202050421U CN 2010205386513 U CN2010205386513 U CN 2010205386513U CN 201020538651 U CN201020538651 U CN 201020538651U CN 202050421 U CN202050421 U CN 202050421U
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Abstract
The utility model discloses an end-to-end encrypted speech processing device. The security encryption module of the device is only responsible for providing a key stream to each speech frame and the parity exclusive OR operation of encryption is completed by a speech processing module. When end-to-end speech encryption is conducted, a sender transmits speech frame serial numbers for the end-to-end encryption by occupying partial information bits in the speech frame, and a receiver can realize the synchronization of speech decryption by analyzing the speech frame serial numbers only. Compared with the prior art, the end-to-end encrypted speech processing device has the advantages that since the parity exclusive OR operation is shifted into the speech processing module and partial serial operation during speech processing is turned into parallel operation, the speech processing time delay is reduced and the processing efficiency is improved; and by reducing the speech encoding rate and by occupying the partial information bits in the speech frame at a transmitting end to transmit the speech frame serial number to realize the synchronization of the end-to-end speech encryption, the time delay is short, the security is high, the device can be realized flexibly and conveniently and the like.
Description
Technical field
The utility model belongs to the communications field, relates to a kind of voice encryption device, relates in particular to a kind of end-to-end enciphoring voice processing unit.
Background technology
In order to guarantee the information security of digital communication system, need to adopt method of encrypting that information transmitted is protected.End to End Encryption is a kind of safety encipher mechanism the most frequently used in the digital communication system.End to End Encryption can be divided into end-to-end speech and encrypt and end-to-end data encryption.End-to-end speech is encrypted and to be meant that voice encrypt at transmitting terminal, in the receiving terminal deciphering, thereby guarantees not exist with the plaintext form in the device node of voice between receiving-transmitting sides.
In traditional end-to-end speech encipherment scheme, safe encryption and decryption module and encoding and decoding speech module are fully independently, and encryption and decryption functions is all realized in security module.Referring to shown in Figure 2, analog voice information enters the speech coding module after by the A/D quantization encoding, and coding becomes the compressed voice stream of low rate in the speech coding module, gives the safety encipher module.The safety encipher module is responsible for generating key stream, and finish whole encryption process, the stream cipher after encrypting is sent into channel coding module carry out chnnel coding, carry out operations such as framing processing and digital modulation again, be input to radio-frequency module at last, go out by antenna transmission.At receiving terminal, then carry out a reverse workflow, the secure decryption module generates key stream, and stream cipher is reduced to plain text stream.
In traditional mode, at transmitting terminal, compressed voice stream to be sent in the safety encipher module earlier, the safety encipher module produces after the key stream, carries out encryption, again the ciphertext voice flow is sent back to channel coding module and carries out next step chnnel coding.Like this, in the ciphering process of a speech frame, the interaction data amount between safety encipher module and the speech coding module is the twice of coding back speech data at least.Equally, the interaction data amount between secure decryption module and the tone decoding module also is the compressed voice data of twice at least in the decrypting process.The call duration time of data interaction adds the processing time that produces key stream, can obviously increase the time delay of whole end-to-end speech information processing.
Summary of the invention
For addressing the above problem, the utility model provides a kind of end-to-end enciphoring voice processing unit, cryptographic operation is not all to be finished by the safety encipher module, the safety encipher module only is responsible for providing the key stream of each speech frame, finish the coordination xor operation of encryption by speech processing module, reduced mutual amount of communication data between speech processing module and the safety encipher module.At receiving terminal, the key stream generating run can be operated parallel processing with channel-decoding, has reduced the time delay of speech processes, has improved treatment effeciency.When carrying out the end-to-end speech encryption, use than the lower slightly speech encoding rate of plain language communication.Transmit leg carries the synchronous control frame signaling of initial vector and key information by transmission, and tie up the speech frame sequence number that End to End Encryption is transmitted in partial information position in the speech frame, the recipient only need just can realize that end-to-end speech deciphers by resolving the speech frame sequence number.Realize Synchronization Control, handle flexiblely, realize simple.
For achieving the above object, the utility model is to realize by following scheme: a kind of end-to-end enciphoring voice processing unit, comprise coding module, decoder module, safety encipher module and secure decryption module, wherein said coding module is by the source encoding unit, coordination XOR unit, speech frame sequence number concatenation unit and chnnel coding sequence of unit connect to form, the safety encipher module connects coordination XOR unit and speech frame sequence number concatenation unit respectively, the safety encipher module provides key stream for coordination XOR unit, for speech frame sequence number concatenation unit provides the speech frame sequence number; Described decoder module is connected to form by channel-decoding unit, speech frame sequence number extraction unit, coordination XOR unit and source coding sequence of unit, described secure decryption module connects coordination XOR unit and speech frame sequence number extraction unit respectively, described secure decryption module is obtained the speech frame sequence number from speech frame sequence number extraction unit, for coordination XOR unit provides key stream.
In voice processing apparatus described in the utility model, for realize that end-to-end speech encrypts synchronously, by reducing speech encoding rate, tie up partial information position speech frames sequence number in the speech frame at transmitting terminal, resolve the speech frame sequence number at receiving terminal.
The utility model uses the stream cipher arithmetic of encrypting based on bit stream, and enciphering rate is fast and can carry out precomputation.For stream cipher arithmetic, encryption is exactly to generate stream cipher behind plain text stream and the key stream coordination XOR, and deciphering is exactly to be reduced into plain text stream behind stream cipher and the key stream coordination XOR.Coordination XOR unit is put in the speech processing module, and use than the lower slightly speech encoding rate of plain language communication, by tie up the partial information position speech frames sequence number in the speech frame at transmitting terminal, and extract the sequence number of each speech frame at receiving terminal, realize that end-to-end speech encrypts synchronously.Wherein, the initial value that the speech frame sequence number is appointed from receiving-transmitting sides begins counting, adds 1 frame by frame.
At transmitting terminal, analog voice information enters the source encoding unit after by the A/D quantization encoding, coding becomes the compressed voice stream of low rate in the source encoding unit, the safety encipher module only is responsible for generating key stream and speech frame sequence number, in speech processing module, finish the coordination XOR of plain text stream and key stream, and after the concatenation of speech frame sequence number, the ciphertext voice flow is sent into the chnnel coding unit carry out chnnel coding, carry out operations such as framing processing and digital modulation again, be input to radio-frequency module at last, go out by antenna transmission.
At receiving terminal, the signal that receives from antenna is by radio-frequency module, digital demodulation and separate the frame processing module, delivers to the channel-decoding unit.Because stream cipher arithmetic can carry out the precomputation of key stream, therefore can be in channel-decoding and abstraction sequence number operation, by security module computation key stream in advance.Give the safety encipher module after the speech frame sequence number extracts, security module only need be carried out a simple comparison, need to judge whether regenerating key stream to get final product, and has obviously reduced because of generating the wait time delay that key stream produces.After in speech processing module, carrying out coordination XOR and source coding, pass through the D/A digital-to-analogue conversion at last, obtain analog voice signal.
Compared with prior art, advantage of the present utility model is: the coordination xor operation that the utility model will be finished in safety encipher module and secure decryption module originally moves on in the speech processing module, by the stream of computation key in advance, make the part serial operation in the speech processes process become parallel work-flow, and by reducing speech encoding rate, tie up partial information position speech frames sequence number in the speech frame at transmitting terminal, synchronous to realize that end-to-end speech is encrypted, have advantages such as time delay is low, safe, realization is flexible.Simultaneously, finish the coordination xor operation of encryption by the speech coding module, finish the coordination xor operation of deciphering by the tone decoding module, reduced mutual amount of communication data between coding module and safety encipher module, decoder module and the secure decryption module, reduce the speech processes time delay, improved treatment effeciency.
Description of drawings
Fig. 1 is the structural representation of end-to-end speech processing unit described in the utility model;
Fig. 2 is traditional end-to-end speech processing unit structural representation under the utility model background technology.
Wherein, the sequence number among Fig. 1 is: 1-analog voice, 2-A/D converting unit, 3-source encoding unit, 4-coordination XOR unit, 5-concatenation unit, 6-chnnel coding unit, 7-framing, 8-digital modulation, 9-radio-frequency module, 10-digital demodulation, 11-separate frame, 12-channel-decoding unit, 13-extraction unit, 14-source coding unit, 15-D/A converting unit, 16-safety encipher module, 17-secure decryption module.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail, but not as to qualification of the present utility model.Be example with the DMR digital cluster system below, the utility model is described in further detail.
A kind of end-to-end enciphoring voice processing unit, comprise coding module, decoder module, safety encipher module 16 and secure decryption module 17, wherein said coding module is linked in sequence by source encoding unit 3, coordination XOR unit 4, speech frame sequence number concatenation unit 5 and chnnel coding unit 6 and forms, safety encipher module 16 connects coordination XOR unit 4 and speech frame sequence number concatenation unit 5 respectively, described safety encipher module 16 provides key stream for coordination XOR unit 4, for speech frame sequence number concatenation unit 5 provides the speech frame sequence number; Described decoder module is linked in sequence by channel-decoding unit 12, speech frame sequence number extraction unit 13, coordination XOR unit 4 and source coding unit 12 and forms, described secure decryption module 17 connects coordination XOR unit 4 and speech frame sequence number extraction unit 13 respectively, described secure decryption module 17 is obtained the speech frame sequence number from speech frame sequence number extraction unit 13, for coordination XOR unit 4 provides key stream.
When plain language was communicated by letter, the DMR system used the speech coding algorithm of code check as 2.4Kbps.When adopting end-to-end speech to encrypt, need to reduce speech encoding rate.The 15bits that takies in the speech data of every 60ms analog voice coding back transmits the speech frame sequence number.Like this, the data length behind the 60ms analog voice coding shortens to 129bits, and the actual speech code rate is reduced to 2.15Kbps when promptly adopting End to End Encryption.
At transmitting terminal, analog voice 1 information is by the quantization encoding of A/D converting unit 2, generate the 8KHz sampling, enter source encoding unit 3 after the PCM data that 16bits quantizes, coding becomes the compressed voice stream of 2.15Kbps in source encoding unit 3, safety encipher module 16 is responsible for generating the key stream of 129bits and the speech frame sequence number of 15bits, in coordination XOR unit 4, finish the coordination XOR of plain text stream and key stream, and after finishing the concatenation of speech frame sequence number with concatenation unit 5, the ciphertext voice flow is sent into chnnel coding unit 6 carry out forward error correction channel, obtain the data flow of 3.6Kbps, carrying out framing 7 again handles and digital modulation 8 modulation operations, be input to radio-frequency module 9 at last, go out by antenna transmission.
At receiving terminal, the signal that receives from antenna is by radio-frequency module 9, digital solution system 10 and separate frame 11 and handle, signal is delivered to channel-decoding unit 12 carry out the forward error correction channel-decoding, from each speech frame, extract 15bits voice sequence number by extraction unit 13, give secure decryption module 17.Secure decryption module 17 built-in counters since 0 counting, add 1 frame by frame.In 12 decodings of channel-decoding unit and extraction unit 13 extraction speech frame sequence numbers, secure decryption module 17 has been calculated the key stream of 129bits in advance, after the speech frame sequence number extracts, 17 of secure decryption modules need be carried out a simple comparison with the numerical value in the counter, need to judge whether regenerating key stream to get final product.After coordination XOR unit 4 carries out coordination XOR and 14 decodings of source coding unit, pass through 15 digital-to-analogue conversions of D/A converting unit at last, reduction obtains analog voice 1.
The above; it only is the embodiment in the utility model; but protection range of the present utility model is not limited thereto; anyly be familiar with the people of this technology in the disclosed technical scope of the utility model; conversion or the replacement expected can be understood, all of the present utility model comprising within the scope should be encompassed in.Therefore, protection range of the present utility model should be as the criterion with the protection range of claims.
Claims (1)
1. end-to-end enciphoring voice processing unit, comprise coding module, decoder module, safety encipher module (16) and secure decryption module (17), it is characterized in that: described coding module is linked in sequence by source encoding unit (3), coordination XOR unit (4), speech frame sequence number concatenation unit (5) and chnnel coding unit (6) and forms, and described safety encipher module (16) connects coordination XOR unit (4) and speech frame sequence number concatenation unit (5) respectively; Described decoder module is linked in sequence by source coding unit (12), speech frame sequence number extraction unit (13), coordination XOR unit (4) and channel-decoding unit (14) and forms, and described secure decryption module (17) connects coordination XOR unit (4) and speech frame sequence number extraction unit (13) respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205386513U CN202050421U (en) | 2010-09-21 | 2010-09-21 | End-to-end encrypted speech processing device |
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| CN2010205386513U CN202050421U (en) | 2010-09-21 | 2010-09-21 | End-to-end encrypted speech processing device |
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| CN202050421U true CN202050421U (en) | 2011-11-23 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522087A (en) * | 2011-11-25 | 2012-06-27 | 青岛海信移动通信技术股份有限公司 | Method, device and terminal for transmitting anti-bugging voice |
| CN102970133A (en) * | 2012-11-12 | 2013-03-13 | 安徽量子通信技术有限公司 | Voice transmission method of quantum network and voice terminal |
| CN103684787A (en) * | 2013-12-13 | 2014-03-26 | 北京大学深圳研究生院 | Encryption-decryption method and terminal of data pack based on network transmission |
| CN112217734A (en) * | 2019-07-10 | 2021-01-12 | 海能达通信股份有限公司 | Voice information synchronization method and communication system |
-
2010
- 2010-09-21 CN CN2010205386513U patent/CN202050421U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522087A (en) * | 2011-11-25 | 2012-06-27 | 青岛海信移动通信技术股份有限公司 | Method, device and terminal for transmitting anti-bugging voice |
| CN102522087B (en) * | 2011-11-25 | 2013-08-28 | 青岛海信移动通信技术股份有限公司 | Method, device and terminal for transmitting anti-bugging voice |
| CN102970133A (en) * | 2012-11-12 | 2013-03-13 | 安徽量子通信技术有限公司 | Voice transmission method of quantum network and voice terminal |
| CN102970133B (en) * | 2012-11-12 | 2015-10-14 | 安徽量子通信技术有限公司 | The voice transmission method of quantum network and voice terminal |
| CN103684787A (en) * | 2013-12-13 | 2014-03-26 | 北京大学深圳研究生院 | Encryption-decryption method and terminal of data pack based on network transmission |
| CN103684787B (en) * | 2013-12-13 | 2018-01-16 | 北京大学深圳研究生院 | The encrypting and decrypting method and terminal of packet based on network transmission |
| CN112217734A (en) * | 2019-07-10 | 2021-01-12 | 海能达通信股份有限公司 | Voice information synchronization method and communication system |
| CN112217734B (en) * | 2019-07-10 | 2022-11-18 | 海能达通信股份有限公司 | Voice information synchronization method and communication system |
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Granted publication date: 20111123 |
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