KR100387269B1 - METHOD OF ENCIPHERING COMMUNICATION USING VoIP SERVER AND SYSTEM THEREOF - Google Patents

Abstract

Disclosed are a communication method and system using a VoIP server. The system includes communication means for generating a secret mode selection signal and a telephone number of the receiving side communication means according to a user's selection; And a V _O IP server which assigns an IP address for a secret mode to the communication means and the receiving side communication means in response to the secret mode selection signal of the communication means, wherein the receiving side communication means is an encryption transmitted from the communication means. Decrypted voice data, and the V _O IP server may pass-through encrypted voice data between communication means assigned the IP address for the secret mode, thereby assuring end-to-end secret service.

Description

Secretion communication method and system using voice over IP server {METHOD OF ENCIPHERING COMMUNICATION USING VoIP SERVER AND SYSTEM THEREOF}

The present invention relates to a secret communication method and system using a VoIP server, and to a secret communication method and system using a VoIP server that can easily provide a secret service without modification of an existing mobile communication network.

Secreting service in the present invention refers to a service for enhancing the end-to-end security in the CDMA communication by mounting an encryption module (secret module) in the transmission and reception terminal.

Conventionally, secret communication between communication terminals has been studied for the case of requiring a secret call such as a senior national, military, police, corporate senior management. In this case, a vocoder bypass method, that is, a method of bypassing data transmitted and encoded by a communication terminal to a counterpart terminal without processing by the vocoder of the system, has been considered.

This is because when the vocoder of the system processes the data, the encryption is released and the secreting effect is lost.

However, the vocoder bypass method must complement the current communication network in order to bypass the unvoiced voice data in the system, and there is a problem in that a lot of modification cost is required.

The present invention has been invented to solve the above problems, and an object of the present invention is to apply a VoIP server to secure the end-to-end secret communication between communication terminals without modification of the existing communication network using a VoIP server and method To provide.

The system according to the present invention for achieving the above object,

Communication means for generating a secret mode selection signal and a telephone number of the receiving side communication means according to a user's selection; And

A V _O IP server for allocating an IP address for the secret mode to the communication means and the receiving side communication means in response to the secret mode selection signal of the communication means,

The receiving side communication means decrypts the encrypted voice data transmitted from the communication means, and the V _O IP server passes the encrypted voice data between the communication means to which the IP address for the secret mode is assigned.

The method according to the invention,

a) transmitting a secret mode selection signal and a receiving telephone number according to a user's selection;

b) connecting originating and receiving communication means to the V _O IP server in response to the secret mode selection signal of step a);

c) assigning an IP address to the calling and receiving communication means connected according to step b); And

d) passing the encrypted data between the communication means assigned the IP address according to step c) to execute the call.

1 is a block diagram of a secret communication system using a VoIP server according to the present invention.

2 is a schematic diagram of a wireless secret terminal according to the present invention.

3 is a flowchart illustrating a secret communication method between wireless secret terminals according to the present invention.

4 is a flowchart illustrating a secret communication method between a wireless secret terminal and a general wired terminal according to the present invention.

5 is a flowchart illustrating a secret communication method between a wireless secret terminal and a wired secret terminal according to the present invention.

6 is a flowchart illustrating a secret communication method between the wireless secret terminal and the secret mode Internet phone according to the present invention.

<Explanation of symbols for main parts of the drawings>

100, 110: wireless secretion terminal 120: mobile communication network

130: Dedicated Internet Phone 140: Internet Phone

150: Internet network 160: VoIP server

170: matching device 180: PSTN wired network

190: general wired terminal 200: wired secret terminal

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention.

1 is a configuration diagram of a communication system using a VoIP server according to the present invention, a wireless communication terminal (100, 110) for communicating via a mobile communication network 120, a PC and a headset connected to the Internet network 150 A general wired terminal 190 which communicates via an Internet phone 140, a dedicated Internet phone 130 directly connected to the Internet network 150, and a PSTN / PABX (Private Automatic Branch Exchange) wired network 180. ) And wired secret terminal 200,

The network V _O which is connected to (120, 150, 180) is assigned an IP address, and passing processed data to the terminal IP server (Voice over IP server: 160) and the mobile communication network 120 and the PSTN / PABX wire network matching device 170 is connected to 180 and conversion data for matching between the wireless vocoding and wired vocoding and performs switching to the V _O IP server 160 and mobile communication network 120, It includes.

Here, the PC of the Internet phone 140 is equipped with a secretion module itself.

As shown in FIG. 2, the wireless sparking terminals 100 and 110 include a vocoder 10, a sparking module 20, and a data converter 30.

The vocoder 10 (vocoder: voice coder) is a voice signal processing apparatus that compresses a voice signal. There are EVRC, QCELP, etc. according to the compression method. The vocoder 10 vocodes the input voice signal, and the secreting module 20 encrypts the vocoded voice signal.

The data converter 30 packetizes the encrypted signal and transmits the packet through the antenna.

The dedicated Internet phone 130 does not require a PC when connecting to the Internet.

3 to 6 are flowcharts illustrating a method for communication between terminals according to a preferred embodiment of the present invention.

First, FIG. 3 is a flowchart illustrating a secret communication method between wireless secret terminals.

Determining whether the communication between the wireless secret terminal (100: hereinafter referred to as A) and the wireless secret terminal (110: hereinafter, referred to as B) is secret communication (S100), and the communication between the AB in the step (S100) In the case of non-communication, a step (S106) in which a normal (plain) call is executed, and in the case of non-AB communication in step S100, in which A is connected to the V _O IP server 160 through a mobile communication network ( S101),

The V _O IP server 160 assigning a temporary IP address to A (S102), the V _O IP server 160 assigning a temporary IP address to B (S103), and the V _O IP The server 160 passes (S104) the voice data between the ABs (passing process), and the step (S104) includes a non-AB nonsense call (S105).

Whether or not ciphering a communication between the terminals (A, B) determination is made by the V _O IP server 160. For example, if the talk mode key (not shown) is operated in A, and the call key is operated after the telephone number of B is input, the A signal is generated in A, and the RF signal including the telephone number of B is generated.

The RF signal is judged that through the mobile communication network 120, the V _O IP is received in the server 160, the V _O IP server 160 is a ciphering communication is attempted between the AB based on the received ciphering mode signal do.

The V _O IP server 160 allocates a temporary IP address to A and at the same time assigns a temporary IP address to B through the same process as in A. FIG. In addition, the V _O IP server 160 stores and manages the IP addresses assigned to the temporary table to the number of A and B.

Thus after each assigned a temporary IP address to the A and B, wherein V _O IP server 160 is a call between the AB to occur by passing process voice data between the AB.

On the other hand, in the step (S100), if the non-A-B non-communication communication, a general plain text call is made.

4 is a flowchart illustrating a secret communication method between a wireless secret terminal and a general wired terminal.

Determining whether the communication between the wireless secret terminal (A or B) and the general wired terminal 190 (hereinafter referred to as "C") is secret communication (S200), and in the step (S200), communication between A (or B) and C If it is not the non-communication communication step (S215) and the normal (plain) call is executed,

If the communication between A (or B) and C in the step (S200) is non-speech communication, determining whether the connection attempt from the A (or B) to C or the connection attempt from the C to A (or B) ( S201 and, if the connection attempt from A (or B) to C in step S201 is performed, the A (or B) is connected to the V _O IP server 160 through the mobile communication network 120 (S202). )Wow,

The V _O IP server 160 assigning a temporary IP address to A (or B) (S203), the V _O IP server 160 assigning a temporary IP address to C (S204), The V _O IP server 160 passing the voice data between the A (or B) and the C (S205);

In addition to the processing of step S205, the matching device 170 performs a conversion process for matching between the wireless vocoding scheme on the A (or B) side and the wired speech coding scheme on the C side (S206), A step S207 of making a non-call between A (or B) and C through the step S206;

In the case of attempting to connect from C to A (or B) in step S201, a step of connecting to a general call (S208) and switching to a secret mode by A (or B) through the step (S208). (S209) and A (or B) is connected to the V _O IP server 160 through step S209, and the V _O IP server 160 is a temporary IP to A (or B) and C. Assigning an address (S210 and S211);

The V _O IP server 160 is the A (or B) with the matching device 170, with the process in step (S212) and the step (S212) for passing process voice data between the C is A (or B Performing a conversion process for matching between the wireless vocoding scheme on the) side and the wired voice coding scheme on the C side (S213), and making a non-call between A (or B) and C through the step (S213). (S214).

The above process will be described in detail by dividing into two cases according to step S201.

First, the case of the secret communication connection from A (or B) which is a wireless secret terminal to C which is a general wired terminal is demonstrated.

If the talk mode key is operated in the A (or B), and the call key is operated after the telephone number of C is input, the A (or B) generates an RF signal including the secret mode signal and the phone number of C. do.

The RF signal is received by the V _O IP server 160 through the mobile communication network 120, the V _O IP server 160 is a communication between A (or B) and C based on the received secret mode signal Determine that this is being tried.

The V _O IP server 160 is the A (or B) to at the same time as assigning a temporary IP address, and the bonding device 170, the A (or B) is notified that ciphering call request with C, the A temporary IP address for C connection is assigned to the bonding device 170. In addition, the V _O IP server 160 stores and manages the numbers of A (or B) and C and a temporarily assigned IP address table.

In this way, the A (or B) and then allocated a temporary IP address to the C, V _O the IP server 160 processes the voice data passing between the A (or B) and C. In addition, the matching device 170 performs a conversion process for matching between the wireless vocoding scheme on the A (or B) side and the wired voice coding scheme on the C side to make a call between A (or B) and C. To lose.

Secondly, a case of a secret communication connection from C, which is a general wired terminal, to A (or B), which is a wireless secret terminal, will be described.

In this case, C, which has no built-in secret module, calls A (or B) to make a general call.

In the call, if the two parties agree to communicate with each other, and in A (or B), the talk mode key is operated, and the telephone key is operated after the telephone number of C is input, the talk mode signal and An RF signal is generated that includes the telephone number of C.

The RF signal is received by the V _O IP server 160 through the mobile communication network 120, the V _O IP server 160 is a communication between A (or B) and C based on the received secret mode signal Determine that this is being tried.

The V _O IP server 160, and notifies the fact that the A (or B) ciphered with the C and at the same time assign a temporary IP address for access, and the A (or B) to the welding device 170 to the communication request A temporary IP address for C connection is assigned to the bonding device 170.

The subsequent procedure is the same as the first case.

5 is a flowchart illustrating a secret communication method between a wireless secret terminal and a wired secret terminal.

Determining whether the communication between the wireless secret terminal (A or B) and the wired secret terminal (200: hereinafter referred to as D) is a secret communication (S300), and the communication between A (or B) and D in the step (S300) If it is not the non-communication communication step (S315) that the normal (plain) call is executed,

If the communication between A (or B) and D in the step (S300) is non-speech communication, determining whether the connection attempt from the A (or B) to D or the connection attempt from the D to A (or B) ( S301 and, in the case of a connection attempt from A (or B) to D in step S301, the A (or B) is connected to the V _O IP server 160 through the mobile communication network 120 (S302). )Wow,

The V _O IP server 160 assigning a temporary IP address to A (or B) (S303), the V _O IP server 160 assigning a temporary IP address to D (S304), the V _O IP server 160 is the a (or B) with the matching device 170, with the process in step (S305) and the step (S305) for passing process voice data between D is a (or B Performing conversion processing for matching between the wireless vocoding scheme on the) side and the wired non-coding vocoding scheme on the D side (S306),

In step S307, a non-speech call is made between A (or B) and D through the step S306, and in the case of the connection attempt from D to A (or B) in step S301, the step of being connected by a general call (S308) and the step (S309) of switching to the secret mode by A (or B) through the step (S308),

A (or B) is connected to the V _O IP server 160 through the step S309, and the V _O IP server 160 assigns temporary IP addresses to the A (or B) and D. (S310 and S311), and the V _O IP server 160 passing the voice data between the A (or B) and the D (passing) (S312),

In addition to the processing of the step S312, the matching device 170 performs a conversion process for matching between the wireless vocoding scheme on the A (or B) side and the wired non-coding vocoding scheme on the D side (S313); In step S313, a non-call between A (or B) and D is made.

The process will be described in detail by dividing into two cases according to the step (S301).

First, the case of the secret communication connection from A (or B) which is a wireless secret terminal to D as a wired secret terminal will be described.

If the talk mode key is operated at the A (or B) and the call back key with the telephone number of D is operated, an RF signal including the talk mode signal and the phone number of D is generated at the A (or B). do.

The RF signal is received through the mobile communication network 120 to the V _O IP server 160, and the V _O IP server 160 communicates between A (or B) and D based on the received secret mode signal. Determine that this is being tried.

The V _O IP server 160 assigns a temporary IP address to the D with allocates a temporary IP address to the A (or B). In addition, the V _O IP server 160 stores and manages the numbers of A (or B) and D and a temporarily assigned IP address table.

Thus, after allocating the each temporary IP address to the A (or B), and D, wherein the V _O IP server 160 processes the voice data passing between the D and the A (or B). In addition, the matching device 170 executes a conversion process for matching between the wireless vocoding method on the A (or B) side and the wired non-coding vocoding method on the D side, so that a call between A (or B) and D is lost. To be done.

In this case, when the A (or B) or the D implements and uses all of the vocoding methods used in the wired and wireless networks, the conversion processing of the matching device 170 is not necessary.

Second, a description will be given of the case of the secret communication connection from the wired secret terminal D to the radio secret terminal A (or B).

In this case, the wired secret terminal D calls A (or B) to make a general call.

In the call, if the two parties agree to communicate with each other, the secret mode key is operated at A (or B), and the call key is operated after the telephone number of D is input, the secret mode signal is transmitted at A (or B). An RF signal is generated that includes the telephone number of D.

The RF signal is received through the mobile communication network 120 to the V _O IP server 160, and the V _O IP server 160 communicates between A (or B) and D based on the received secret mode signal. Determine that this is being tried.

The V _O IP server 160 assigns a temporary IP address to the D with allocates a temporary IP address to the A (or B).

The subsequent procedure is the same as the first case.

As described above, according to the present invention, end-to-end secret communication is provided.

6 is a flowchart illustrating a secret communication method between the radio secret terminal and the secret mode internet phone.

Determining whether the communication between the wireless secret terminal (A or B) and the dedicated Internet phone 130 (hereinafter referred to as "E") is secret communication, and the communication between A (or B) and E in step S400. If it is not the non-communication communication step (S406) that the normal (plain) call is executed,

When the communication between A (or B) and E in the step (S400) is non-speech communication, the step (S401) and the A (or B) is connected to the V _O IP server 160 through the mobile communication network 120 and ,

The V _O IP server 160 assigning a temporary IP address to A (or B) (S402), the V _O IP server 160 assigning a temporary IP address to E (S403), The V _O IP server 160 passing the voice data between the A (or B) and the E (S404);

In step S405, a step (S405) in which a non-call between A (or B) and E is made.

If the talk mode key is operated in A (or B), and the call key is operated after the telephone number of E is input, the A (or B) generates an RF signal including the secret mode signal and the phone number of E. do.

The RF signal is received to the V _O IP server 160 through the mobile communication network 120, the V _O IP server 160 is a non-communication communication between A (or B) and E based on the received secret mode signal Determine that this is being tried.

The V _O IP server 160 assigns a temporary IP address to the E with a allocates a temporary IP address to the A (or B). In addition, the V _O IP server 160 stores and manages the numbers of A (or B) and E and a temporarily assigned IP address table.

After allocating temporary IP addresses to A (or B) and E as described above, the V _O IP server 160 passes voice data between A (or B) and E to make a non-call conversation between the two. To lose.

In this case, it is preferable that the voice vocoding scheme allows E to accept the scheme used by A (or B).

As described above, according to the present invention, end-to-end secret communication is provided.

Further, though not shown, but may be practiced also ciphering a communication between the private internet phone 130 and other private Internet phone by the IP address assignment and data processing by the IP server, V _O 160 is a matter of course.

Meanwhile, the same method as described above, i.e., IP address allocation and data by the V _O IP server 160, may also be performed during communication with the Internet phone 140 including the headset and the PC, not the dedicated Internet phone 130. Can be executed by processing. In this case, the secretion module is mounted in the PC.

If you want to talk with the called terminal using CNIP (Caller Number Identification Presentation) function, check the incoming telephone number and select the calling mode to select the calling party number and the calling mode. The signal can be transmitted to the V _O IP server for more convenient communication.

In addition, the telephone numbers of the terminals are stored by using the telephone number storage and retrieval function of the terminals. In the future, when a secret communication with a specific terminal user is desired, the secret communication can be performed more conveniently by selecting a secret mode and selecting a telephone number of the specific terminal from the stored phone numbers.

Also, for example, if the IP address of a frequently-called terminal is stored as a fixed address in the server, and the connection state is maintained with the server in the dormant mode, an immediate call with the caller requesting the non-call is made. Communication can take place.

As described above, according to the present invention, it is possible to guarantee the end-to-end secret service without modification of the existing communication network or system.

Although the present invention has been described in detail by the above embodiments, various modifications are possible without departing from the spirit and scope of the present invention.

Claims (13)

Communication means for generating a secret mode selection signal and a telephone number of the called party communication means according to a user's selection; A V _O IP server which assigns an IP address for a secret mode to the communication means and the called party communication means in response to the secret mode selection signal of the communication means; And When connected to the V _O IP server and one side of the communication means is a wireless communication means and the other side is a wired communication means, matching processing between wireless vocoding on the wireless communication means side and wired vocoding on the wire communication means is performed. A matching means for performing, The called party communication means decrypts the encrypted voice data transmitted from the communication means, And said V _O IP server passes the encrypted voice data between the communication means to which the IP address for the secret mode is assigned. delete 2. A communication system using a VoIP server according to claim 1, further comprising an Internet phone having a secretion module as said communication means. 2. The communication system using a VoIP server according to claim 1, wherein the communication network between the communication means and the V _O IP server includes a mobile communication network, an internet network, and a wired network. 2. The communication apparatus according to claim 1, wherein each of the communication means retrieves a telephone number of a specific communication means that wishes to communicate while storing and managing telephone numbers of called party communication means, and then selects a secret mode together with the telephone number. Secret communication system using the VoIP server, characterized in that for performing the secret communication with the specific communication means. 2. The method according to claim 1, wherein each of the communication means checks the telephone number of the called party's communication means indicated by the CNIP function, and then performs secret communication with the called party's communication means by selecting a secret mode together with the telephone number. Secret communication system using a VoIP server characterized in that. The method of claim 1, wherein in the communication between the secret mode wireless terminal and the secret mode wired terminal among the communication means, both vocoding methods commonly used in wired and wireless are embodied, and the common beam is connected when connected. A communication system using a VoIP server, characterized in that matching processing is performed between two terminals by a coding scheme. a) transmitting a secret mode selection signal and a called party number according to a user's selection; b) connecting the calling party and called party communication means to the V ₀ IP server in response to the secret mode selection signal of step a); c) performing a matching process between wired vocoding and wireless vocoding on the wired communication means side and the wireless communication means side when one side of the communication means is a wired communication means and the other side is a wireless communication means; d) assigning an IP address to the calling party and called party communication means connected according to step b); And and e) passing the encrypted data between the communication means assigned the IP address according to step d) to execute the call. delete 9. The communication method according to claim 8, further comprising: an Internet phone including a secretion module as the communication means. 9. The communication apparatus according to claim 8, wherein each of the communication means retrieves a telephone number of a specific communication means for which communication is desired while storing and managing telephone numbers of called party communication means, and then selects a secreting mode with the telephone number. Secreting communication method using the VoIP server, characterized in that it further comprises the step of performing secret communication with the specific communication means. 9. The method according to claim 8, wherein each of the communication means confirms the telephone number of the called party communication means indicated by the CNIP function, and then performs a secret communication with the called party communication means by selecting a secret mode together with the telephone number. Secret communication method using a VoIP server, characterized in that it further comprises. 10. The method of claim 8, wherein in the communication between the secret mode wireless terminal and the secret mode wired terminal of the communication means, implement both vocoding schemes commonly used in the wired and wireless to the two terminals, and the common beam when connected And a step of matching processing between the two terminals by a coding method.