CN201188646Y

CN201188646Y - Telephone secrecy apparatus

Info

Publication number: CN201188646Y
Application number: CNU2008200475956U
Authority: CN
Inventors: 黄尚南
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-05-12
Filing date: 2008-05-12
Publication date: 2009-01-28
Anticipated expiration: 2018-05-12

Abstract

The utility model provides a telephone privacy device capable of keeping the call content secret. The telephone privacy device comprises a power supply, an A/D conversion module, an encryption module, a decryption module and a D/A conversion module. Voice signals from a telephone transmitter are converted into digital signals through the A/D conversion module, the digital signals are transmitted to the encryption module for data encryption and then the encrypted signals are output to the signal processing unit of a telephone. The signals from the signal processing unit of the telephone are conducted data decryption through the decryption module, the decrypted signals are transmitted to the D/A conversion module and converted into analog signals, and the analog signals are output to the telephone receiver. The signal encryption device can encrypt the internal phone signals, the encrypted signals are then transmitted through a wired or wireless communication network and the call contents fail to be accessible without a corresponding decryption device even though the communication signals are intercepted, thereby the goal of secret telephone communication is achieved.

Description

A kind of confidential phone number device

Technical field

The utility model relates to a kind of confidential phone number communicating devices that is used for.

Background technology

Along with various telephones, wireless telephonic popularizing, relevant communication technology full disclosure, this has brought hidden danger for the fail safe of telephone communication.At present a large amount of wired or wireless monitor devices occurs, can intercept telephone, wireless telephonic dialog context, this can invade caller's privacy, and may bring economically injury to the caller.

Summary of the invention

The purpose of this utility model is in order to propose a kind of confidential phone number device that dialog context can be maintained secrecy.

As shown in Figure 1, this confidential phone number device comprises power supply, analog-to-digital conversion module (11), encrypting module (12), deciphering module (22) and number-Mo modular converter (23), voice signal transfers to analog-to-digital conversion module (11) and changes into digital signal by speech input interface (1), transfer to encrypting module (12) then and carry out data encryption, the signal after the encryption exports the signal processing unit of phone to by coded signal output interface (2); Transfer to deciphering module (22) from the signal of the signal processing unit of phone by coded signal input interface (3) and carry out data decryption, signal after the deciphering transfers to number-Mo modular converter (23) and changes into analog signal, and analog signal is by voice output interface (4) output.

The signal processing unit of described phone is to be used for signal modulation, demodulation, to send signal and receive the unit of other telephone signal to other phone, and according to the difference of phone, this unit also may have signal digital-to-analogue conversion, analog-to-digital function.

This device can be integrated in and utilize digital signal or analog signal to carry out the inside of the telephone set of communication, the speech input interface (1) of this device is linked to each other with the microphone of telephone set, coded signal output interface (2), coded signal input interface (3) link to each other with the signal processing unit of telephone set, and voice output interface (4) links to each other with the loud speaker of telephone set.In the course of work of phone, microphone has been finished the conversion of voice signal to the signal of telecommunication, voice analog signal from microphone transfers to analog-to-digital conversion module (11) and changes into digital signal by speech input interface (1), the digital data transmission that obtains after the conversion is carried out data encryption to encrypting module (12), and the signal after the encryption carries out processing such as digital-to-analogue conversion, modulation, transmission by the signal processing unit that coded signal output interface (2) transfers to phone; From adding of the signal processing unit of phone overstocked signal through analog-to-digital conversion and/or demodulation after, transferring to deciphering module (22) by coded signal input interface (3) is decrypted, signal after the deciphering transfers to number-Mo modular converter (23) and changes into analog signal, and the analog signal after the conversion transfers to the loud speaker of telephone set by voice output interface (4).

The cryptographic algorithm of encrypting module (12) can be varied, for example each deducts a numerical value greater than five numerical digit in the digital signal that input module (12) is encrypted, each adds a numerical value less than five numerical digit, when the digital signal after handling is like this transmitted by network again, even someone is truncated to communication signal, handle according to the conventional method, can not learn dialog context, have only the deciphering module of utilization (22) to carry out corresponding decryption oprerations, could reduce dialog context, so just realize the purpose of secret telephony.

The power supply of this confidential phone number device (not drawing among the figure) can directly utilize the power supply of telephone set.

The simple device solves of the utility model utilization the problem monitored easily of traditional telephone and radio telephone, be adapted at army's communication or diplomatic occasion etc. the safe and secret very high occasion of conversing used.

Description of drawings

Fig. 1 is a theory diagram of the present utility model;

Fig. 2 is the theory diagram of embodiment 1;

Fig. 3 is that embodiment 1 connection in use is provided with block diagram;

Fig. 4 is the theory diagram of embodiment 2.

Embodiment

Describe each embodiment below with reference to the accompanying drawings in detail.

Embodiment 1:

Use and above-mentioned be integrated in phone intercommunication phone privacy device and need transform telephone set, it is not very convenient promoting, carrying and use, in order to address the above problem, present embodiment has proposed a kind of telephone set that need not to transform, the portative confidential phone number device that can externally cooperate with various telephone sets.

The difference of present embodiment and such scheme is also to be provided with number-Mo modular converter 13 between encrypting module 12 and coded signal output interface 2; Between coded signal input interface 3 and deciphering module 22, also be provided with analog-to-digital conversion module 21.

As shown in Figure 2, this device comprises power supply (not drawing among the figure), analog-to-digital conversion module 11, encrypting module 12, number-Mo modular converter 13, analog-to-digital conversion module 21, deciphering module 22 and number-Mo modular converter 23, voice signal from microphone transfers to analog-to-digital conversion module 11 and changes into digital signal by speech input interface 1, transfer to encrypting module 12 then and carry out data encryption, signal after the encryption transfers to number-Mo modular converter 13 and changes into analog signal, and analog signal exports the signal processing unit of phone to by coded signal output interface 2; Signal from the signal processing unit of phone transfers to analog-to-digital conversion module 21 and changes into digital signal by coded signal input interface 3, transfer to deciphering module 22 then and carry out data decryption, signal after the deciphering transfers to number-Mo modular converter 23 and changes into analog signal, and analog signal exports the receiver of phone to by voice output interface 4.

As shown in Figure 3, the coded signal output interface 2 of this device, coded signal input interface 3 are linked to each other with signal processing unit 33 on the telephone set, speech input interface 1 links to each other with microphone 31, and voice output interface 4 links to each other with loud speaker 32.In the course of work of phone, speech input interface 1 receives from the voice analog signal of microphone 31 outputs and transfers to analog-to-digital conversion module 11 and carries out analog-to-digital conversion, the digital data transmission that obtains after the conversion to encrypting module 12 is encrypted, signal after the encryption is by after number-Mo modular converter 13 changes into analog signal, transfers to processing such as signal processing unit 33 on the telephone set is modulated, transmission by coded signal output interface 2 again; Signal processing unit 33 on the telephone set receives after signal that other phone transmits carries out demodulation, transfer to analog-to-digital conversion module 21 by coded signal input interface 3 and carry out analog-to-digital conversion, the digital data transmission that obtains after the conversion to deciphering module 22 is decrypted, signal after the deciphering changes into analog signal by number-Mo modular converter 23, and then transfers to loud speaker 32 by voice output interface 4 and carry out the broadcast of sound.

In the confidential phone number device of present embodiment, the algorithm of encrypting can be varied, but, because this confidential phone number device is to encrypt, decipher between the signal processing unit of microphone, loud speaker and telephone set, signal before and after encrypting, deciphering all is a voice analog signal, so the analog signal that the cryptographic algorithm of using will guarantee to change out through D/A converter module is within the bandwidth that voice communication requires.

Certainly, the confidential phone number device of present embodiment also can be integrated into the inside of telephone set, as long as the coded signal output interface 2 of this device, coded signal input interface 3 are linked to each other with signal processing unit 33 on the telephone set, speech input interface 1 links to each other with microphone 31, and voice output interface 4 links to each other with loud speaker 32 and gets final product.

The device of present embodiment can manufacture a device that volume is very little, is easy to carry about with one, and need not during use telephone set is done any change, as long as this device is cooperated with telephone set, can finish the purpose of secure communication.When using mobile phone, only the plug (interface of microphone 31 and loud speaker 32 is contained in inside) of handset earphone need be inserted the jack (comprising speech input interface 1 and voice output interface 4) of this device, the earphone jack (interface of the signal processing unit 33 of mobile phone is contained in inside) that the plug of this device (comprising coded signal input interface 3 and coded signal output interface 2) inserts on the mobile phone gets final product, so just can make the coded signal output interface 2 of this device, coded signal input interface 3 links to each other with signal processing unit 33 on the mobile phone, speech input interface 1 links to each other with microphone 31, voice output interface 4 links to each other with loud speaker 32, finishes secret telephony.

The power supply of this device (not drawing among the figure) preferably adopts battery powered form, is convenient for carrying like this, can also reduce and outside interface, and is easy to use.

Embodiment 2:

As shown in Figure 4, present embodiment as different from Example 1 this device also include encryption control module 14 that links to each other with encrypting module 12 and the deciphering control module 24 that links to each other with deciphering module 22.

Described encryption control module 14 and deciphering control module 24 are to control the module of cipher mode by input digit or other control character, the numeral of input encryption control module 14 or other control character can directly be selected algorithm built-in in the encrypting module 12 or participate in the algorithm, equally, the numeral of input deciphering control module 24 or other control character can directly be selected algorithm built-in in the deciphering module 22 or participate in the algorithm.For finishing above-mentioned functions, encrypt control module 14 and decipher control module 24 input equipments such as control button must be arranged, the display unit that the display screen that can indicate described control button input content, indicator light and so on preferably also will be arranged is to make things convenient for input digit or character.

Encrypt control module 14 and deciphering control module 24 by increasing, this confidential phone number device has increased the control to cipher mode, and a confidential phone number device can have different cryptographic algorithm, has strengthened the effect of maintaining secrecy greatly.

In all above-mentioned embodiment, what encrypting module 12 and deciphering module 22 handled all is digital signal, therefore the circuit of described encrypting module 12 and deciphering module 22 all be can processing digital signal chip and control circuit thereof.Described chip that can processing digital signal is chips such as ARM, DSP, wherein preferably adopts the higher dsp chip of cost performance, for example TMS32020, the TMS320125 etc. of Texas ,Usa instrument company (Texas Instruments is called for short TI).

The utility model has solved the problem that traditional telephone and radio telephone are monitored easily.Owing to adopted the Crypted password of multidigit, even adopt exhaustive pattern, also be difficult to realize the deciphering of phone, safety call is had crucial meaning.And, owing to encryption mode is set by individual subscriber, even the manufacturer of this device also can't decipher the content that this device is maintained secrecy.This device is adapted at army's communication or diplomatic occasion etc. the safe and secret very high occasion of conversing is used.

Claims

1, a kind of confidential phone number device, it is characterized in that this device comprises power supply, analog-to-digital conversion module (11), encrypting module (12), deciphering module (22) and number-Mo modular converter (23), voice signal transfers to analog-to-digital conversion module (11) and changes into digital signal by speech input interface (1), transfer to encrypting module (12) then and carry out data encryption, the signal after the encryption exports the signal processing unit of phone to by coded signal output interface (2); Transfer to deciphering module (22) from the signal of the signal processing unit of phone by coded signal input interface (3) and carry out data decryption, signal after the deciphering transfers to number-Mo modular converter (23) and changes into analog signal, and analog signal is by voice output interface (4) output.

2, confidential phone number device according to claim 1 is characterized in that also being provided with number-Mo modular converter (13) between encrypting module (12) and coded signal output interface (2); Between coded signal input interface (3) and deciphering module (22), also be provided with analog-to-digital conversion module (21).

3, confidential phone number device according to claim 1 and 2 is characterized in that described encrypting module (12) also is connected with encryption control module (14); Described deciphering module (22) also is connected with deciphering control module (24).

4, confidential phone number device according to claim 3 is characterized in that described encryption control module (14) and deciphering control module (24) are provided with the control button of may command cipher mode.

5, confidential phone number device according to claim 4 is characterized in that described encryption control module (14) and deciphering control module (24) also are provided with display screen or the indicator light that can indicate described control button input content.

6, confidential phone number device according to claim 1 and 2 is characterized in that the circuit of described encrypting module (12) and deciphering module (22) is the control circuit of dsp chip and dsp chip.