KR20000043340A - Security apparatus of video conference system - Google Patents

Abstract

PURPOSE: A security apparatus of a video conference system is provided to prevent overhearing, privately hearing, and hacking in a security situation by diversely changing code modes. CONSTITUTION: A video encoder/decoder(140) codes and decodes video data inputted and outputted from and to a video input/output unit(100). An audio encoder/decoder(150) codes and decodes audio data inputted and outputted from and to an audio input/output unit(110). A reception path delay unit(180) delays a voice data path received to the audio encoder/decoder(150). A data protocol(160) codes and decodes digital data inputted and outputted from and to a digital data input/output unit(120). A MUX/DEMUX(190) matches data mutually transmitted to be connected.

Description

Security Device in Video Conference System

The present invention relates to a security device in a videoconferencing system, and more particularly, it is possible to use the videoconferencing system in a secure state and to change the encryption mode in various ways so that eavesdropping, eavesdropping and hacking by a third party can be performed. It relates to a security device of a video conferencing system to prevent it.

In recent years, video conferencing systems that can conduct meetings through remote telephone lines have been widely used in large corporations, research groups, and hospitals. That is, such a video conferencing system is a system that is connected to each other through a predetermined communication network using a modem to transmit and receive video data and audio data.

Such a conventional video conferencing system includes a video input / output device (1), an audio input / output device (2), a data input / output device (3), a system controller (4), a video encoder / decoder (6), An audio encoder / decoder 7, a data transmission protocol 8, a control signal protocol 9, a reception delay device 10, a mux / demux 11 and a modem 12 are provided.

The video input / output device 1 is a video input / output device composed of a camera and a video output apparatus composed of a monitor. The audio input / output device 2 is an audio output device composed of a voice input device composed of a microphone and a sound card. The digital data input / output device 3 is composed of a computer and is a device for inputting and outputting data from a user.

The video encoder / decoder 6 compresses and decompresses video data inputted and outputted to the video input / output device 1. The audio encoder / decoder 7 compresses and restores audio data input and output to the audio input / output device 2.

The data protocol 8 transmits and receives data of a protocol such as a control flow for data transmission. The receiving path delay apparatus 10 delays the received audio data input to the audio encoder / decoder 7.

The mux / demux 11 transmits and receives data to and from the video encoder / decoder 6 and the audio encoder / decoder 7 and the data protocol 8 based on the control signal from the control signal protocol 8. It will connect sequentially.

The modem modulates the data output through the mux / demux 11 and outputs it to the communication line side, and demodulates the data received from the communication line and transmits the demodulated data to the mux / demux 11 side. The system controller 4 controls the control signal protocol 9 to smoothly transmit and receive data while controlling the operation of the modem 120 in accordance with a predetermined processing procedure.

However, such a conventional video conferencing system communicates with each other's video input / output devices or audio input / output devices. At this time, the data according to the communication is only compressed and restored, but the data transmission is not secured. There was a problem that the contents of communication can be intercepted and eavesdropped.

Accordingly, the present invention has been made to solve the problems of the conventional video conferencing system, the video conferencing system can be used in a secure state, it is possible to variously change the encryption mode by tapping, tapping and hacking by a third party The purpose of the present invention is to provide a security device of a video conferencing system.

The present invention for achieving the above object is a video encoder / decoder for coding and decoding the image data input and output to the video input / output device, an audio encoder / decoder for coding and decoding the audio data input and output to the audio input / output device, and A reception path delay device for delaying a path of voice data received by an audio encoder / decoder, a data protocol for coding and decoding digital data input / output to a digital data input / output device, the video encoder / decoder, an audio encoder / decoder, A mux / demux for correspondingly connecting and transmitting data transmitted through a data protocol, a modem for modulating data to be transmitted through a predetermined transmission path and demodulating and transmitting the received data to each other; The data transmitted between the demux and modem A scrambler to scramble the received data and descramble the received data, and to control the data transmission of the mux / demux to be sequentially performed based on a predetermined communication protocol, while controlling the modem to change the cipher mode of the encryption processor. And a control signal protocol for controlling the protocol of the control signal transmitted from the system control unit to the mux / demux from the system control unit.

The encryption processing unit for achieving the object of the present invention scrambles the scrambled data storage unit for storing a plurality of encrypted data and the information data output from the mux / demux based on the encrypted data stored in the scrambled data storage unit And a descrambler for restoring the encrypted information data received from the modem side to the original data and transmitting the original data to the mux / demux, and controlling the scrambler data storage unit according to a predetermined control signal from a system controller to control the scrambler and the descrambler. Characterized in that the mode selection unit for selecting the encrypted data provided to.

1 is a block diagram showing the configuration of a conventional video conferencing system.

2 is a block diagram illustrating a system for recall meetings having a security function according to an embodiment of the present invention.

Figure 3 is a diagram showing in detail the encryption processing unit of the video conferencing system having a security function according to an embodiment of the present invention.

<Explanation of symbols for main parts of drawing>

100: video input / output device 110: audio input / output device

120: digital data input and output device 130: system control unit

140: data protocol 170: control signal protocol

180: reception delay device 190: mux / demux

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The security device in the video conferencing system according to the present invention includes a video encoder / decoder 140 and an audio input / output device 110 for coding and decoding image data input and output to the video input / output device 100 as shown in FIG. 2. An audio encoder / decoder 150 for coding and decoding audio data inputted and outputted to the audio signal; a reception path delay device 180 for delaying a path of voice data received by the audio encoder / decoder 150; and a digital data input / output device. A data protocol 160 for coding and decoding digital data input and output to the 120 and the video encoder / decoder 140 and the audio encoder / decoder 150 and the data protocol 160 are transmitted to each other. The mux / demux 190 that connects the data in correspondence with each other, modulates the data to be transmitted through a predetermined transmission path, and demodulates the received data. The modem 210 to transmit, the encryption processing unit 200 is connected between the mux / demux 190 and the modem to scramble the transmitted data and to descramble the received data, and the mux / demux 190 The system controller 130 controls to change the encryption mode of the encryption processing unit 200 and controls the data transmission and reception of the modem 210 while controlling data transmission to be sequentially performed based on a predetermined communication protocol. And a control signal protocol 170 for controlling the protocol of the control signal transmitted from the system controller 130 to the mux / demux 190.

The encryption processing unit 200 is outputted from the mux / demux 190 based on the scrambled data storage unit 203 for storing a plurality of encrypted data and the encrypted data stored in the scrambled data storage unit 203. The descrambler 202 which scrambles the information data, restores the encrypted information data received from the modem 210 side to the original data, and transmits the original data to the mux / demux 190, and a predetermined value from the system controller 130. The mode selector 204 controls the scrambled data storage unit 203 according to a control signal to select encrypted data provided to the scrambler 201 and the descrambler 202.

On the other hand, the security operation according to the communication in the video conferencing system according to the present invention having such a configuration is as follows.

First, when the data output from the mux / demux 190 is encrypted and transmitted to the modem 210, a predetermined mode control signal is input from the system controller 130 to the encryption processing unit 200. The mode selector 204 then selects the encrypted data code stored in the scrambled data memory 203 according to the mode control signal.

At this time, the selected encryption data code is output from the scrambled data storage unit 203 and input to the predetermined encryption data code input terminal S3 of the scrambler 201. Then, the scrambler 210 scrambles (encrypts) the transmission data input to the data input terminal S1 and the encryption data input to the encryption data code input terminal S3 and output the data through the data output terminal S2.

The encrypted data as described above is modulated by the modem 210 to be transmitted to the other party through a predetermined communication line.

Next, when the data received from the modem 210 is decrypted and transmitted to the mux / demux 190 side, the same encryption transmission mode is selected during the transmission operation.

Thereafter, the cipher data code of the scrambled data storage unit 203 selected by the mode selection unit 204 is input to the predetermined cipher data input terminal S3 of the descrambler 202. Then, the descramble 202 descrambles (decrypts) the received data received from the modem 210 and input to the data input terminal D1 and the encrypted data code input terminal D3 to decode (decrypt) the data output terminal D2. Is sent through. Thus, the decrypted data is received through the mux / demux 190.

As described above, the present invention can use the video conferencing system in a secure state, and can change the encryption mode in various ways, thereby preventing eavesdropping, eavesdropping, and hacking by a third party.

Claims (2)

A video input / output device 100 through which a predetermined video signal is input and output, an audio input / output device 110 through which an audio signal is input / output, and a digital input / output device 120 through which digital information data is input / output is provided. In the video conferencing system for transmitting a, A video encoder / decoder 140 for coding and decoding image data input and output to the video input / output device 100, an audio encoder / decoder 150 for coding and decoding audio data input and output to the audio input / output device 110; A data path 160 for coding and decoding digital data input and output to and from the reception path delay device 180 for delaying a path of the voice data received by the audio encoder / decoder 150 and the digital data input / output device 120. And a mux / demux 190 for connecting data transmitted to each other through the video encoder / decoder 140, the audio encoder / decoder 150, and the data protocol 160, and a predetermined transmission. The modem 210 modulates data to be transmitted through a furnace, demodulates the received data, and transmits the demodulated data to each other, and is connected between the mux / demux 190 and the modem and transmitted. The encryption processing unit 200 and the encryption processing unit 200 to scramble the received data and descrambles the received data, and to control the data transmission of the mux / demux 190 to be made sequentially based on a predetermined communication protocol, And a control signal transmitted from the system controller 130 to the mux / demux 190 so as to control the encryption mode of the control panel and to control the data transmission / reception and connection functions of the modem 210. Security signal in a video conferencing system, characterized in that it comprises a control signal protocol 170 for controlling the protocol of the. 2. The mux / demux according to claim 1, wherein the encryption processing unit (200) is based on the scrambled data storage unit (203) for storing a plurality of encrypted data and the encrypted data stored in the scrambled data storage unit (203). The descrambler 202 for scrambled the information data output from the 190, restoring the encrypted information data received from the modem 210 to the original data, and transmitting the original data to the mux / demux 190, and a system controller. And a mode selector 204 for controlling the scrambled data storage unit 203 according to a predetermined control signal to select encrypted data provided to the scrambler 201 and the descrambler 202. Security device in a video conference system.