Setup method and device for chaos secret telephone

A security phone and chaotic technology, applied in the direction of security communication, telephone structure, electrical components, etc., can solve problems such as difficult to solve the voice, achieve the effect of fast synchronization speed, high reliability, and strong anti-deciphering ability

Inactive Publication Date: 2008-02-27
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Digitize the voice first and then encrypt it with a high-speed cipher machine. The encrypted digital signal is transmitted in the telephone line. The call received by the bug is just a piece of noise, and it is difficult to decipher the original voice.

Method used

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  • Setup method and device for chaos secret telephone
  • Setup method and device for chaos secret telephone
  • Setup method and device for chaos secret telephone

Examples

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Embodiment Construction

[0030] Chaos Security Phone

[0031] Taking a kind of "chaotic security telephone" made by the technology of the present invention as an example, the specific implementation of the technology will be described below.

[0032] 1. Refer to Figure 3 for circuit structure design

[0033] In the chaos security telephone realized by this invention, a kind of data stream chaos encoding and decoding modular circuit 10 is adopted, which is used to compress real-time voice signals and perform CPRS chaos encryption and decryption operations, and utilize telephone line modem MODEM11 to realize chaos encryption voice data The duplex transmission of the stream signal utilizes the display and communication port control circuit MCU12 controlled by the single-chip microcomputer to realize the display of information, utilizes the buttons on the ordinary telephone base 15 and the dual-tone multi-frequency receiving and demodulating circuit 18 to realize the input of button information, Utilize ...

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PUM

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Abstract

It consists of the normal telephone handset and the base set composed of the modular circuit for using chaos to encoding and decoding data flow, modem, the circuit for controlling display and communicaltion port, the line switcher, handle input switcher, the on line DC power, the on line resistor, the dual-tone multi-frequency reception and demodulation circuit, and ID data setting. The invention also discloses a new algorithm that uses chaos pseudo random sequence to encrypt and decrypt.

Description

1. Technical field [0001] The invention belongs to the technical field of chaotic secure communication, and relates to secure communication of wired voice and data and secure telephone equipment. 2. Background technology [0002] There are many methods for voice security. The simplest is voice conversion technology. Another security technology is to divide the voice into multiple time segments, and use several different conversion frequencies to transmit the voice components of these time segments. The sequence of lengths and switching frequencies can be determined by pre-arranged code cards that are simultaneously inserted into the encoder and decoder. The voice of each time segment can be divided into a series of frequency bands, and a different audio conversion frequency is used for each segment, and the frequency division and audio tone conversion frequency can be changed randomly. A five-band splitter can scramble and transform speech into 3,840 forms, but only a few o...

Claims

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Application Information

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IPC IPC(8): H04M1/19H04K1/02
Inventor 季晓勇史军马赟倪皖荪单增罗布
Owner NANJING UNIV
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