KR101811668B1 - A driving system for voice encryption by Based Security Chip and that of driving method - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a voice encoding and decoding system based on a security chip and a driving method using the same. The encapsulation driving system of the present invention is equipped with a security chip for encryption driving to generate a security key in a security chip for voice call and to use a TLS (Transfer Layer Security) to transmit a security key through a VoIP exchanger A wireless VoIP terminal for transmitting the security key of the called terminal and requesting the security key of the called terminal and reproducing the voice by encrypting or decrypting the received security key and the generated security key in the security chip, a signal between the wireless VoIP terminal and RTP Protocol to the VoIP exchanger so that voice communication is performed.
Thus, a security chip for encryption and activation implemented in hardware is installed in a wireless VoIP terminal to generate a security key in a security chip, and a security key is mutually exchanged between a calling terminal and a called terminal through a VoIP exchange, , It is possible to encrypt a voice packet in a security chip or to maintain security of a voice call during a decryption VoIP call.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a voice encryption system based on a security chip,

The present invention relates to a voice encoding and decoding system based on a security chip and a driving method using the same, and more particularly, to a security chip implemented in hardware, A security chip-based voice that encrypts or decrypts voice packets in a security chip by exchanging security keys between a calling terminal and a called terminal through a VoIP exchange, And a drive method using the same.

In addition, the present invention provides a wireless IP terminal equipped with a cryptographic driver chip implemented in hardware, encrypts an RTP packet in a chip and delivers the encrypted RTP packet to a wireless terminal, and decrypts an RTP packet received from a chip, And more particularly, to a voice encoding and decoding system based on a security chip for ensuring voice security by making it impossible to reproduce voice without a chip, and a driving method using the same.

A commonly used wireless VoIP terminal transmits voice using RTP (Real Time Protocol). However, wireless VoIP is vulnerable to interception of RTP packets in the wireless section. In particular, the RTP packet is exposed without any restriction in the WiFi section which is commonly used. RTP packets that are delivered unencrypted can be played back as is with a simple tool, so conversations with the other party can be intercepted by a third party. In order to prevent this, a technique of encrypting the RTP packet by software rather than directly is used, but encryption by software can be decrypted by a group or a technician who specializes in hacking. Wireless VoIP technology, which is vulnerable to security, is an important factor in turning off customers who need security.

Accordingly, in the related art, a technology for providing a secure voice call by encrypting and decrypting a voice packet by generating a security key by embedding a security chip in a terminal by a hardware technique is proposed.

[Related Technical Literature]

1. VOICE ENCRYPTED COMMUNICATION MODULE FOR MOBILE COMMUNICATION TERMINAL FOR A MOBILE COMMUNICATION TERMINAL (Patent Application No. 10-2007-0034509)

2. SYSTEM AND METHODS FOR ENCRYPTED MOBILE VOICE COMMUNICATIONS (Patent Application No. 10-2014-706228)

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a security chip for a cryptographic operation implemented in hardware in a wireless VoIP terminal and generate a security key in a security chip, A security chip-based voice encoding / decoding system capable of encrypting or decrypting voice packets in a security chip by exchanging with each other using a security key in each terminal, and maintaining security of a voice call during a VoIP call, and a driving method using the same will be.

In addition, the present invention provides a wireless IP terminal equipped with a cryptographic driver chip implemented in hardware, encrypts an RTP packet in a chip and delivers the encrypted RTP packet to a wireless terminal, and decrypts an RTP packet received from a chip, A voice encoding and decoding system based on a security chip for ensuring voice security by preventing a voice from being reproduced even if a chip is not present, and a driving method using the same

In addition, the present invention provides a security key authentication method. When transferring to the called terminal, TLS (Transfer Layer Security) is used to prevent the security key from being exposed in the radio section. RTP, which carries the actual voice after key transmission, is encrypted using a security chip, The present invention provides a voice encoding and decoding system based on a security chip and a driving method using the same, which can play back voice without being able to reproduce it if the security keys transmitted to each other at the start are not known.

However, the objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

According to another aspect of the present invention, there is provided a security chip-based voice encoding / decoding system, comprising: a security chip for encryption / Transmits the encrypted security key through the VoIP exchange so that the security key is not exposed in the radio section, requests the security key of the called terminal, encrypts the received security key and the generated security key in the security chip to encrypt or decrypt the RTP, A VoIP terminal, and a VoIP exchange for transmitting a signal between a wireless VoIP terminal and a real time protocol (RTP) through a communication network to allow a voice call to be established.

In addition, in the voice encoding / decoding system based on the security chip according to another embodiment of the present invention, the wireless VoIP terminal encrypts the security key generated in the security chip with an RTP packet and transmits the encryption key to the other party using TLS (Transfer Layer Security) Encrypts the received security key with RTP, and encrypts or decrypts the received RTP packet by encrypting or decrypting the RTP packet. If the RTP packet is intercepted in the wireless section, Can not be reproduced.

In addition, in the voice encoding and decoding system based on the security chip according to another embodiment of the present invention, the wireless VoIP terminal generates a security key in a security chip for encryption and transmits the generated security key to a counterpart using TLS And encrypts and decrypts the RTP by applying the counterpart's security key and the generated security key transmitted from the counterpart to the security chip.

According to another aspect of the present invention, there is provided a method of operating a voice encryption method based on a security chip, the method comprising the steps of: receiving a voice signal from a calling wireless VoIP terminal through a security chip Generating a security key, transmitting the generated security key to an incoming call request signal, transmitting it to a VoIP exchange for an incoming call request, and transmitting the message to a receiving wireless VoIP terminal; Upon receiving a call from the VoIP exchanger, the receiving wireless VoIP terminal generates a security key of its own through a security chip for encryption driving installed in the receiving wireless VoIP terminal at the moment of receiving a ring while ringing, Transmitting the security key to the VoIP exchange and transmitting the security key to the originating wireless VoIP terminal; At the same time, the receiving wireless VoIP terminal sends the security key of the originating wireless VoIP terminal and its own security key to the security chip to prepare for encryption and decryption of RTP, and the originating wireless VoIP terminal also secure the received security key and its security key A third step of transferring the RTP to the chip to prepare for encryption and decryption of RTP; After the third step, the originating wireless VoIP terminal transmits a response confirmation signal to the response signal of the receiving wireless VoIP terminal through the VoIP exchange, and transmits the security key of the receiving wireless VoIP terminal and its security key to the security chip A fourth step of encrypting the RTP through the security chip, transmitting the encrypted RTP to the VoIP exchange, and decrypting the encrypted RTP of the received wireless VoIP terminal received from the VoIP exchange; And a fifth step of encrypting the RTP of the receiving wireless VoIP terminal through the security chip and transmitting the encrypted RTP to the VoIP exchange and decoding the encrypted RTP of the originating wireless VoIP terminal received from the VoIP exchange .

A voice encoding and decoding system based on a security chip and a method of using the same according to an embodiment of the present invention includes a security chip for encrypting and driving implemented in a hardware and installed in a wireless VoIP terminal to generate a security key in a security chip, The security key is exchanged between the called terminals through the VoIP exchange so that each terminal can encrypt the voice packet in the security chip by using the security key or maintain the security of the voice call during the decryption VoIP call.

In addition, a voice encoding and decoding system based on a security chip and a driving method using the encryption chip according to the present invention may be configured such that an encryption driving chip implemented in hardware is installed in a wireless VoIP terminal and an RTP packet is encrypted in a chip, Even if the RTP packet is intercepted in the wireless section by using the method of decoding by the chip, voice can be guaranteed by preventing the voice from being reproduced without the chip.

In addition, a voice encoding and decoding system based on a security chip according to the present invention and a driving method using the same provide security keys. When transferring to the called terminal, TLS (Transfer Layer Security) is used to prevent the security key from being exposed in the radio section. RTP, which carries the actual voice after key transmission, is encrypted using a security chip, If you do not know the secret keys that are passed to you at startup, you can play with confidence because you can not play.

1 is a block diagram of a voice encoding and decoding system based on a security chip according to the present invention;
FIG. 2 is a flowchart illustrating a procedure for operating a voice encryption based on a security chip according to the present invention; FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a detailed description of preferred embodiments of the present invention will be given with reference to the accompanying drawings. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In the present specification, when any one element 'transmits' data or signals to another element, the element can transmit the data or signal directly to the other element, and through at least one other element Data or signal can be transmitted to another component.

1 is a block diagram of a voice encoding and decoding system based on a security chip according to the present invention. The voice encryption operating system based on the security chip according to the present invention comprises an originating wireless VoIP terminal 10, an incoming wireless VoIP terminal 20, and a VoIP switching center 30.

Hereinafter, a detailed configuration and operation of a voice encoding and decoding system based on a security chip according to the present invention will be described with reference to FIG. 1, wherein the wireless VoIP terminals 10 and 20 include a security chip A secure key is generated in the security chip mounted on the terminal, the secure key is generated through the VoIP exchange 30, the security key of the called terminal is requested through the VoIP exchange 30, and the received security key and the generated secret key are encrypted or decrypted in the security chip And reproduces the voice by decoding.

The wireless VoIP terminal 10 encrypts the security key generated in the security chip with an RTP packet and transmits the encrypted RTP packet to the counterpart wireless VoIP terminal 20 using TLS (Transfer Layer Security) So that the voice can not be reproduced even if the RTP packet is eavesdropped in the wireless section without the security chip.

That is, the wireless VoIP terminals 10 and 20 use the TLS (Transfer Layer Security) as a counterpart of the security key generated in the security chip to prevent the security key from being exposed in the radio section, Is encrypted using a security chip so that even if the RTP packet is intercepted in the wireless section, the voice can not be reproduced without the chip.

As described above, according to the security chip-based voice encoding and encryption method of the present invention, the security key is generated in the hardware security chip, the generated security key is transmitted to the other party using the TLS, The generated security key is applied to the security chip so that RTP is encrypted and decrypted.

The security key is not exposed in the radio section through the TLS (Transfer Layer Security), which transmits the security key to the other party, and the RTP for transmitting the actual voice after the key transmission is encrypted using the security chip. And is used during the VoIP exchange with the wireless VoIP terminal and is a protocol used to connect the other party with the telephone.

Since the TLS technology is already a publicized technology, it is not described in detail in the present invention.

Meanwhile, the VoIP exchange 30 is an exchange for relaying signals and RTP between the wireless VoIP terminals 10 and 20

FIG. 2 is a flowchart illustrating a voice encoding / decoding process based on a security chip according to an embodiment of the present invention. Referring to FIGS. 1 and 2, As follows.

First, the originating wireless VoIP terminal 10 generates a security key through a security chip for encryption driving installed in the terminal before the voice call to the receiving wireless VoIP terminal 20. (Step S10)

The originating wireless VoIP terminal 10 transmits the generated security key to the incoming VoIP terminal 20 in response to the incoming call request signal to the VoIP exchange in step S20, (Refer to step S30)

Upon receiving a call from the VoIP exchange 30, the receiving wireless VoIP terminal 10 receives a phone call while the ringing tone is ringing, and transmits its own security key through a security chip for encryption driving installed in the receiving wireless VoIP terminal 20 The VoIP switching center 30 transmits the security key of the receiving wireless VoIP terminal 20 to the calling wireless VoIP terminal 30 in step S40 and transmits the generated security key to the VoIP switching center 30 in step S50. (Step S60)

Meanwhile, the receiving wireless VoIP terminal 20 simultaneously transmits the security key of the source wireless VoIP terminal 20 and its security key to the security chip to prepare for encryption and decryption of the RTP (step S70) (10) also transmits the received security key and its security key to the security chip to prepare for encryption and decryption of RTP (step S80)

Thereafter, the source wireless VoIP terminal 10 transmits an acknowledgment signal to the response signal of the receiving wireless VoIP terminal 20 through the VoIP switch 30 (step S90) And transmits its own security key to the security chip, encrypts the RTP through the security chip, transmits it to the VoIP exchange 30, and decrypts the encrypted RTP of the received wireless VoIP terminal 20 received from the VoIP exchange (step S100)

Likewise, the receiving wireless VoIP terminal 20 having received the acknowledgment encrypts its own RTP through the security chip, sends it to the VoIP exchange 30, decrypts the encrypted RTP of the source wireless VoIP terminal 10 received from the VoIP exchange 30 (Step S110)

Through the above process, the voice RTP of the source wireless VoIP terminal 10 and the destination wireless VoIP terminal 20 are mutually encrypted and transmitted. Even if the voice RTP is leaked by the third party in the process of being transmitted, Even if it finds the key, it can not play RTP except the security chip at the time of generating the security key. The conversation between incoming calls is safely protected.

As described above, preferred embodiments of the present invention have been disclosed in the present specification and drawings, and although specific terms have been used, they have been used only in a general sense to easily describe the technical contents of the present invention and to facilitate understanding of the invention , And are not intended to limit the scope of the present invention. It is to be understood by those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

10: Outgoing wireless VoIP terminal
20: receiving wireless VoIP terminal
30: VoIP exchanger

Claims (4)

It is equipped with a security chip for encryption operation to generate a security key in the security chip of voice call and transmit it through VoIP exchange so that the security key is not exposed in the radio section by using TLS (Transfer Layer Security) (10, 20), a signal between a wireless VoIP terminal (10, 20) and an RTP (Real Time Protocol (RTP)) signal for encrypting or decrypting a received security key and a generated security key in a security chip And a VoIP exchanger (3) for communicating a voice call to the voice communication system,
The wireless VoIP terminal
Encrypts the security key generated by the security chip with the RTP packet, forwards it to the other party using TLS (Transfer Layer Security), passes the security key, encrypts the security key through RTP, which transmits the actual voice using the security chip, Wherein the RTP packet is encrypted or decrypted by the security chip so that the voice can not be reproduced even if the RTP packet is intercepted in the wireless section without the security chip.
delete delete The originating wireless VoIP terminal 10 generates a security key through a security chip for encryption driving installed in the terminal before voice call to the receiving wireless VoIP terminal 20 and sends the generated security key to the incoming call request signal, To the called wireless VoIP terminal (20);
Upon reception of a call from the VoIP exchange 30, the receiving wireless VoIP terminal 20 generates a security key of its own via a security chip for encryption driving installed in the receiving wireless VoIP terminal 20 A second step of transmitting the generated security key to the VoIP switching center 30 and transmitting the security key to the outgoing wireless VoIP terminal 10;
At the same time, the receiving wireless VoIP terminal 20 sends the security key of the originating wireless VoIP terminal 20 and its security key to the security chip to prepare for encryption and decryption of RTP, and the originating wireless VoIP terminal 10 also receives A third step of transferring the security key and its security key to the security chip to prepare for encryption and decryption of RTP;
After the third step, the source wireless VoIP terminal 10 transmits an acknowledgment signal to the response signal of the destination wireless VoIP terminal 20 through the VoIP switch 30, Transmitting the key and its security key to the security chip, encrypting the RTP through the security chip, transmitting the encrypted RTP to the VoIP exchange 30, and decrypting the encrypted RTP of the received wireless VoIP terminal 20 received from the VoIP exchange; And
Upon receipt of the acknowledgment, the receiving wireless VoIP terminal 20 encrypts its RTP through the security chip and transmits it to the VoIP exchange 30 and decrypts the encrypted RTP of the source wireless VoIP terminal 10 received from the VoIP exchange 30 The method comprising the steps of: (a) receiving a voice message from a user;

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