CN102404730A - Bluetooth-protocol-based encryption device and encryption method for mobile phone communication - Google Patents
Bluetooth-protocol-based encryption device and encryption method for mobile phone communication Download PDFInfo
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- CN102404730A CN102404730A CN201110349168XA CN201110349168A CN102404730A CN 102404730 A CN102404730 A CN 102404730A CN 201110349168X A CN201110349168X A CN 201110349168XA CN 201110349168 A CN201110349168 A CN 201110349168A CN 102404730 A CN102404730 A CN 102404730A
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Abstract
The invention belongs to the field of security protection and particular relates to a Bluetooth-protocol-based encryption device and an encryption method for mobile phone communication. The Bluetooth-protocol-based encryption device is characterized in that an analog sound signal generated by an MIC (Media Interface Connector) is converted into a digital signal through an A/D (Analogue-to-Digital) conversion module; the digital signal is subjected to digital encryption through an FPGA (Field Programmable Gate Array) chip so as to form a digital voice signal with a cipher text; the digital voice signal with the cipher text is modulated by a data modulator, and then, is inputted to a voice coder so as to form an RPL-LTP (Remote Program Load-Long Term Prediction) universal code; the RPL-LTP universal code is then subjected to channel coding so as to form a regular digital signal which meets the requirements of communication specifications; and the digital signal is transmitted to a mobile phone through a bluetooth chip. The Bluetooth-protocol-based encryption device and the encryption method for the mobile phone communication do not need to refit the mobile phone or install software into the mobile phone, are suitable for any mobile phone with a bluetooth function, and can be rapidly applied to occasions needing secret communication, such as public securities, governments, business people and the like, thereby having great promotion value and market application prospects.
Description
Technical field
The invention belongs to safety-security area, be specially a kind of mobile communication encryption device and encryption method based on Bluetooth protocol.
Background technology
Communication signal transmission faces numerous security threats through a plurality of links such as portable terminal, aerial, base station, trunk and switching equipment in the mobile network.And the safety measure that is adopted in the mobile radio communication at present can not guarantee the fail safe of communicating by letter; Can't satisfy public security, government, enterprise, senior business people etc. some to higher department of security requirement and personnel's requirement, so the use of mobile communication is very limited.
End to End Encryption can solve the safety issue that exists in the mobile communication effectively: through End to End Encryption, the information between the user exists with the ciphertext form in the overall process of transmission, can effectively prevent multiple attacks such as illegal wiretapping.End to End Encryption need not made amendment to mobile network basis equipment in addition, and feasibility is high.
The End to End Encryption system of part based on mobile radio communication arranged at present abroad, but still had problems such as voice quality is relatively poor, the special encryption of needs terminal, aspect fail safe, also had many hidden danger.These problems relate to the technology of many aspects such as authentication, encoding and decoding speech, data encrypting and deciphering and transfer of data, and concentrated being embodied on the encryption terminal as End to End Encryption carrying person.Therefore, need carry out comprehensively and systematic research mobile encrypted terminal.
Summary of the invention
To the problem that exists in the prior art, the object of the present invention is to provide a kind of based on the mobile communication encryption device of Bluetooth protocol and the technical scheme of encryption method.
Described mobile communication encryption device based on Bluetooth protocol; It is characterized in that: this encryption device is communicated with mobile phone through bluetooth; Mainly comprise keyboard, MIC, buzzer, Bluetooth chip, fpga chip, FLASH chip, loud speaker, battery and auxiliary circuit; Keyboard links to each other with fpga chip through the keyboard chip, and MIC links to each other with fpga chip through the A/D module, and fpga chip links to each other with Bluetooth chip with vocoder through data modulator; The analoging sound signal that MIC produces is a digital signal through the A/D module converts, and this digital signal is carried out digital encryption through fpga chip, forms the audio digital signals of band ciphertext; The audio digital signals of band ciphertext is through the data modulator modulation; Be input to vocoder again, form the RPL-LTP universal coding, the RPL-LTP universal coding carries out chnnel coding again; Formation rule meet the digital signal that communication specification requires, this digital signal is sent to mobile phone through Bluetooth chip.
Described mobile communication encryption device based on Bluetooth protocol is characterized in that described encryption device can carry out encryption and decryption to signal.
Described mobile communication encryption device based on Bluetooth protocol is characterized in that stored telephone basis, MP3 song in the described FLASH chip.
Described mobile communication encryption device based on Bluetooth protocol is characterized in that described battery adopts slim lithium battery, and battery is that encryption device provides power supply.
The encryption method of described mobile communication encryption device based on Bluetooth protocol is characterized in that: send mobile phone and receive corresponding with it the respectively encryption device of mobile phone and is connected through bluetooth approach, when transmission mobile phone and reception mobile phone communicate; Through carrying out the information input with the MIC that sends the encryption device that mobile phone links to each other with keyboard, input signal is a digital signal through the A/D module converts, and this digital signal is passed through fpga chip and carried out digital encryption; Form the audio digital signals of band ciphertext; The audio digital signals of band ciphertext is input to vocoder again through the data modulator modulation, forms the RPL-LTP universal coding; The RPL-LTP universal coding carries out chnnel coding again; Formation rule meet the digital signal that communication specification requires, this digital signal is sent to the transmission mobile phone through Bluetooth chip, sends mobile phone and transmits signals to the reception mobile phone through moving the words networking; The reception mobile phone is delivered to information through bluetooth approach and is received the encryption device that mobile phone links to each other; Decipher to the received signal with the encryption device that the reception mobile phone links to each other, voice playback or note, decrypting process and ciphering process are opposite.
The encryption method of described mobile communication encryption device based on Bluetooth protocol is characterized in that described transmission mobile phone and receives that mobile phone is conversed or when sending note, at first will open encryption device separately.
The encryption method of described mobile communication encryption device based on Bluetooth protocol; It is characterized in that the described encryption device continuous with sending mobile phone all has identical encryption and decryption password with the encryption device that links to each other with the reception mobile phone, two encryption devices all can encryption and decryption.
The proposition of the present invention innovation based on the principle and the method for the mobile phone cipher communicator of Bluetooth protocol; Combine on-site programmable gate array FPGA the Bluetooth communication chip equal altitudes to integrate; Form the encrypt communication apparatus of perfect in shape and function, integrated level height, good reliability; Encrypt general-purpose algorithm AES to the world and be integrated into FPGA, and with bluetooth (Bluetooth) co-ordination, make it to overcome coded communication hysteresis chronic illness.
The present invention need not reequip or mobile phone carried out software install, and is fit to any mobile phone with Bluetooth function, can be applied to need to be keep secret occasions for communication such as public security, government, business people rapidly, has very big promotional value and market application foreground.
Description of drawings
Fig. 1 is the structural representation of encryption device of the present invention;
Fig. 2 is encryption device signal processing flow figure of the present invention;
Among the figure: 1-MIC, 2-buzzer, 3-keyboard, 4-Bluetooth chip, 5-FPGA chip, 6-FLASH chip, 7-loud speaker, 8-battery.
Embodiment
Below in conjunction with Figure of description the present invention is further specified:
Mobile communication encryption device based on Bluetooth protocol; Encryption device is communicated with mobile phone through bluetooth; Mainly comprise hardware and auxiliary circuits such as keyboard 3, MIC1, buzzer 2, Bluetooth chip 4, fpga chip 5, FLASH chip 6, loud speaker 7, battery 8; Keyboard 3 links to each other with fpga chip 5 through the keyboard chip, and MIC1 links to each other with fpga chip 5 through the A/D module, and fpga chip 5 links to each other with Bluetooth chip with vocoder through data modulator; The analoging sound signal that MIC1 produces is a digital signal through the A/D module converts, and this digital signal is carried out digital encryption through fpga chip 5, forms the audio digital signals of band ciphertext; The audio digital signals of band ciphertext is through the data modulator modulation; Be input to vocoder again, form the RPL-LTP universal coding, the RPL-LTP universal coding carries out chnnel coding again; Formation rule meet the digital signal that communication specification requires, this digital signal is sent to mobile phone through Bluetooth chip; This encryption device can carry out encryption and decryption to signal; Buzzer can make the encryption device can sounding; Antenna is the bent type antenna of built-in miniature, in the FLASH chip stored telephone this, MP3 song and serve as USB flash disk and use, whole encryption device adopts a slim lithium battery power supply.
Encryption method based on the mobile communication encryption device of Bluetooth protocol is following: send mobile phone and receive corresponding with it the respectively encryption device of mobile phone and is connected through bluetooth approach, when sending mobile phone and communicating with the reception mobile phone, MIC and keyboard through the encryption device that links to each other with the transmission mobile phone carry out information input; Input signal is a digital signal through the A/D module converts; This digital signal is carried out digital encryption through fpga chip, forms the audio digital signals of band ciphertext, and the audio digital signals of band ciphertext is through the data modulator modulation; Be input to vocoder again; Form the RPL-LTP universal coding, the RPL-LTP universal coding carries out chnnel coding again, formation rule meet the digital signal that communication specification requires; This digital signal is sent to the transmission mobile phone through Bluetooth chip; The transmission mobile phone transmits signals to the reception mobile phone through moving the words networking, and the reception mobile phone is delivered to information through bluetooth approach and received the encryption device that mobile phone links to each other, and deciphers to the received signal with the encryption device that the reception mobile phone links to each other; Voice playback or note, decrypting process and ciphering process are opposite.
It should be noted that and send mobile phone and receive that mobile phone is conversed or when sending note, at first will open encryption device separately; The encryption device continuous with sending mobile phone has identical encryption and decryption password with the encryption device that links to each other with the reception mobile phone, and two encryption devices all can encryption and decryption.
Claims (7)
1. based on the mobile communication encryption device of Bluetooth protocol; It is characterized in that: this encryption device is communicated with mobile phone through bluetooth; Mainly comprise keyboard, MIC, buzzer, Bluetooth chip, fpga chip, FLASH chip, loud speaker, battery and auxiliary circuit; Keyboard links to each other with fpga chip through the keyboard chip, and MIC links to each other with fpga chip through the A/D module, and fpga chip links to each other with Bluetooth chip with vocoder through data modulator; The analoging sound signal that MIC produces is a digital signal through the A/D module converts, and this digital signal is carried out digital encryption through fpga chip, forms the audio digital signals of band ciphertext; The audio digital signals of band ciphertext is through the data modulator modulation; Be input to vocoder again, form the RPL-LTP universal coding, the RPL-LTP universal coding carries out chnnel coding again; Formation rule meet the digital signal that communication specification requires, this digital signal is sent to mobile phone through Bluetooth chip.
2. the mobile communication encryption device based on Bluetooth protocol according to claim 1 is characterized in that described encryption device can carry out encryption and decryption to signal.
3. the mobile communication encryption device based on Bluetooth protocol according to claim 1 is characterized in that stored telephone basis, MP3 song in the described FLASH chip.
4. the mobile communication encryption device based on Bluetooth protocol according to claim 1 is characterized in that described battery adopts slim lithium battery, and battery is that encryption device provides power supply.
5. the encryption method of the mobile communication encryption device based on Bluetooth protocol according to claim 1 is characterized in that: send mobile phone and receive corresponding with it the respectively encryption device of mobile phone and is connected through bluetooth approach, when transmission mobile phone and reception mobile phone communicate; Through carrying out the information input with the MIC that sends the encryption device that mobile phone links to each other with keyboard, input signal is a digital signal through the A/D module converts, and this digital signal is passed through fpga chip and carried out digital encryption; Form the audio digital signals of band ciphertext; The audio digital signals of band ciphertext is input to vocoder again through the data modulator modulation, forms the RPL-LTP universal coding; The RPL-LTP universal coding carries out chnnel coding again; Formation rule meet the digital signal that communication specification requires, this digital signal is sent to the transmission mobile phone through Bluetooth chip, sends mobile phone and transmits signals to the reception mobile phone through moving the words networking; The reception mobile phone is delivered to information through bluetooth approach and is received the encryption device that mobile phone links to each other; Decipher to the received signal with the encryption device that the reception mobile phone links to each other, voice playback or note, decrypting process and ciphering process are opposite.
6. the encryption method of the mobile communication encryption device based on Bluetooth protocol according to claim 5 is characterized in that described transmission mobile phone and receives that mobile phone is conversed or when sending note, at first will open encryption device separately.
7. the encryption method of the mobile communication encryption device based on Bluetooth protocol according to claim 5; It is characterized in that the described encryption device continuous with sending mobile phone all has identical encryption and decryption password with the encryption device that links to each other with the reception mobile phone, two encryption devices all can encryption and decryption.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110349168XA CN102404730A (en) | 2011-11-08 | 2011-11-08 | Bluetooth-protocol-based encryption device and encryption method for mobile phone communication |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110349168XA CN102404730A (en) | 2011-11-08 | 2011-11-08 | Bluetooth-protocol-based encryption device and encryption method for mobile phone communication |
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| CN102404730A true CN102404730A (en) | 2012-04-04 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105472603A (en) * | 2014-09-30 | 2016-04-06 | 易讯科技股份有限公司 | Communication terminal encryption system and encryption method thereof |
| CN105530635A (en) * | 2014-09-30 | 2016-04-27 | 易讯科技股份有限公司 | Communication terminal encryption device |
| CN106162502A (en) * | 2015-03-20 | 2016-11-23 | 北京虎符科技有限公司 | Safe bluetooth communication equipment |
| CN109151140A (en) * | 2018-10-22 | 2019-01-04 | 西安工业大学 | Mobile terminal sound cryptographic communication system and method |
-
2011
- 2011-11-08 CN CN201110349168XA patent/CN102404730A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105472603A (en) * | 2014-09-30 | 2016-04-06 | 易讯科技股份有限公司 | Communication terminal encryption system and encryption method thereof |
| CN105530635A (en) * | 2014-09-30 | 2016-04-27 | 易讯科技股份有限公司 | Communication terminal encryption device |
| CN106162502A (en) * | 2015-03-20 | 2016-11-23 | 北京虎符科技有限公司 | Safe bluetooth communication equipment |
| CN109151140A (en) * | 2018-10-22 | 2019-01-04 | 西安工业大学 | Mobile terminal sound cryptographic communication system and method |
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Application publication date: 20120404 |