KR200425873Y1 - 유해정보 탐지 및 방지 기능을 구비한 가상사설망 장치 - Google Patents

유해정보 탐지 및 방지 기능을 구비한 가상사설망 장치 Download PDF

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KR200425873Y1
KR200425873Y1 KR2020060016994U KR20060016994U KR200425873Y1 KR 200425873 Y1 KR200425873 Y1 KR 200425873Y1 KR 2020060016994 U KR2020060016994 U KR 2020060016994U KR 20060016994 U KR20060016994 U KR 20060016994U KR 200425873 Y1 KR200425873 Y1 KR 200425873Y1
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virtual private
network
private network
data packet
harmful information
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KR2020060016994U
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김세곤
윤영태
박동기
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주식회사 인프니스
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/02—Network architectures or network communication protocols for network security for separating internal from external traffic, e.g. firewalls
    • H04L63/0272—Virtual private networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
    • H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/14—Network architectures or network communication protocols for network security for detecting or protecting against malicious traffic
    • H04L63/1408—Network architectures or network communication protocols for network security for detecting or protecting against malicious traffic by monitoring network traffic

Abstract

유해정보 탐지 및 방지 기능을 구비한 가상사설망 장치가 개시된다. 가상사설망부는 터널링 프로토콜과 보안 절차를 사용하여 공중망 기반시설을 기초로 데이터 네트워크를 구성한다. 암호화/복호화부는 가상사설망부에 의해 구성된 제1가상사설망의 내부에 위치한 네트워크 단말장치로부터 유입된 데이터 패킷을 공중망을 통해 제2가상사설망의 내부에 위치한 목적지 단말장치로 송신하기 전에 제1데이터 패킷을 암호화하고, 공중망을 통해 유입된 데이터 패킷을 제1가상사설망의 내부에 위치한 네트워크 단말장치로 전달하기 전에 복호화한다. 유해정보탐지부는 제1가상사설망의 내부에 위치한 네트워크 단말장치로부터 유입된 데이터 패킷에 대한 암호화가 수행되기 전 또는 제1가상사설망의 외부에 위치한 네트워크 단말장치로부터 유입되어 복호화된 데이터 패킷을 제1가상사설망의 내부에 위치한 네트워크 단말장치로 전달하기 전에 데이터 패킷의 유해성을 검사하고, 유해정보가 발견된 데이터 패킷을 폐기한다. 본 고안에 따르면, 정보의 암호화/복호화 과정에서 유해한 정보를 탐지하여 관리자에게 통지하거나 해당 정보의 전송을 차단함으로서 통신의 비밀성을 보장하는 동시에 유해정보의 전달을 방지할 수 있다.
ADSL, 보안, 유해정보, 가상사설망, 비화통신

Description

유해정보 탐지 및 방지 기능을 구비한 가상사설망 장치{Virtual private network device having a function of detecting and preventing malignant data}
도 1은 기존의 VPN 장비에 의한 정보의 전달과정을 도시한 도면,
도 2는 본 고안에 따른 유해정보 탐지 및 방지 기능을 구비한 가상사설망 장치에 대한 일 실시예의 상세한 구성을 도시한 도면, 그리고,
도 3은 본 고안에 따른 유해정보 탐지 및 방지 기능을 구비한 가상사설망 장치에서 데이터 패킷의 전송과정을 도시한 흐름도이다.
본 고안은 유해정보 탐지 및 방지 기능을 구비한 가상사설망 장치에 관한 것으로, 보다 상세하게는, 정보의 비화통신이 수행되는 가상사설망에서 유해정보의 전달을 차단하기 위한 유해정보 탐지 및 방지 기능을 구비한 가상사설망 장치에 관한 것이다.
전화선을 통한 인터넷의 사용은 xDSL의 기술로 대표되며, 저가형의 기술로는 ADSL을 통한 기술이 있다. 이러한 기술은 인터넷의 보급을 전국민화하게 하는 중요한 솔루션으로 자리를 잡았다. 또한 인터넷 망에서의 상호간의 비화통신을 위한 VPN 솔루션의 기술은 이미 최상에 도달해 있다고 해도 과언이 아니다. 그러나, 최근의 해킹 또는 보안침해의 동향은 VPN의 한 쪽의 종단에서 보안침해를 위한 정보가 생산되어 VPN 구간을 통해서 다른 쪽의 종단에 전달되어 보안사고를 유발하는 문제점이 지속적으로 노출되고 있다. 이러한 보안사고를 방지하기 위해서는 정보를 암호화하기 전에 그 정보가 유해한 정보인지 여부를 분석하거나 해당 사용자에게 정보가 전달되기 전에 복호화하여 정보의 유해성을 검사하여야 한다.
현재의 VPN 시스템은 1:1의 암호화 통신을 수행하는 VPN 장비로 구성되어 있으며, 정보의 전달과정은 도 1에 도시된 바와 같다. 도 1을 참조하면, 특정한 네트워크에 연결되어 있는 PC, 서버 등과 같은 네트워크 단말장치(110)에서 전송된 정보는 해당 네트워크에 존재하는 VPN 장비(120)에 의해 암호화되어 인터넷을 통해 다른 네트워크에 존재하는 VPN 장비(130)로 전달되고, 암호화된 정보는 해당 VPN 장비(130)에 의해 복호화되어 해당 네트워크에 연결되어 있는 PC, 서버 등과 같은 네트워크 단말장치(140)로 전달된다.
도 1에 도시된 바와 같이 양 쪽 네트워크의 VPN 구간에서는 암호화 통신으로 인하여 보안 무결성이 유지되어 도감청 및 통신에 대한 유해 여부를 판별할 수 없다. 그런데, 각각의 VPN 단말 장비(120, 130)의 하위 단에 위치한 네트워크 단말장치(110, 140)에 암호화 통신을 위한 컨텐츠가 웜(Worm), 바이러스(Virus) 또는 통신 상대 단말장치에 대한 해킹 코드 등이 존재하면, 이러한 부정데이터를 암호화 통신 중에는 차단할 수 없다. 이것은 VPN이 구현하고자 하는 암호화를 통한 통신 무결성 때문이다. 이와 같이 현재의 VPN 시스템은 암호화를 통해 통신의 비밀은 보 장이 되지만 통신의 내용의 안정성을 보장할 수 없다는 문제가 있다.
본 고안이 이루고자 하는 기술적 과제는, 정보의 암화화 또는 복호화 과정에서 유해한 정보를 탐지할 수 있는 유해정보 탐지 및 방지 기능을 구비한 가상사설망 장치를 제공하는 데 있다.
상기의 기술적 과제를 달성하기 위한, 본 고안에 따른 유해정보 탐지 및 방지 기능을 구비한 가상사설망 장치는, 터널링 프로토콜과 보안 절차를 사용하여 공중망 기반시설을 기초로 데이터 네트워크를 구성하는 가상사설망부; 상기 가상사설망부에 의해 구성된 제1가상사설망의 내부에 위치한 네트워크 단말장치로부터 유입된 데이터 패킷을 공중망을 통해 제2가상사설망의 내부에 위치한 목적지 단말장치로 송신하기 전에 상기 제1데이터 패킷을 암호화하고, 공중망을 통해 유입된 데이터 패킷을 상기 제1가상사설망의 내부에 위치한 네트워크 단말장치로 전달하기 전에 복호화하는 암호화/복호화부; 및 상기 제1가상사설망의 내부에 위치한 네트워크 단말장치로부터 유입된 데이터 패킷에 대한 암호화가 수행되기 전 또는 상기 제1가상사설망의 외부에 위치한 네트워크 단말장치로부터 유입되어 복호화된 데이터 패킷을 상기 제1가상사설망의 내부에 위치한 네트워크 단말장치로 전달하기 전에 데이터 패킷의 유해성을 검사하고, 유해정보가 발견된 데이터 패킷을 폐기하는 유해정보탐지부;를 가진다.
이에 의해, 정보의 암호화/복호화 과정에서 유해한 정보를 탐지하여 관리자 에게 통지하거나 해당 정보의 전송을 차단함으로서 통신의 비밀성을 보장하는 동시에 유해정보의 전달을 방지할 수 있다.
이하에서, 첨부된 도면들을 참조하여, 본 고안에 따른 유해정보 탐지 및 방지 기능을 구비한 가상사설망 장치의 바람직한 실시예에 대해 상세하게 설명한다.
도 2는 본 고안에 따른 유해정보 탐지 및 방지 기능을 구비한 가상사설망 장치에 대한 일 실시예의 상세한 구성을 도시한 도면이다.
도 2를 참조하면, 본 고안에 따른 유해정보 탐지 및 방지 기능을 구비한 가상사설망 장치(200)는 가상사설망부(210), 암호화부(220) 및 유해정보탐지부(230)로 구성된다.
가상사설망부(210)는 터널링 프로토콜과 보안 절차 등을 사용하여 공중망 기반시설을 기초로 각각의 목적에 맞는 데이터 네트워크를 구성한다. 가상사설망부(210)는 xDSL, ADSL 등의 기술에 의해 통신회사가 제공하는 공중망 기반시설을 기초로 보안이 유지되는 자체망을 구성하며, 보안이 유지되는 공중망 자원의 공유를 가능하도록 한다.
암호화/복호화부(220)는 가상사설망의 내부에 위치한 네트워크 단말장치로부터 유입된 데이터 패킷을 공중망을 통해 목적지 단말장치로 송신하기 전에 해당 데이터 패킷을 암호화하고, 공중망을 통해 유입된 데이터 패킷을 가상사설망의 내부에 위치한 네트워크 단말장치로 전달하기 전에 복호화한다. 이러한 암호화 및 복호화는 패킷의 데이터 뿐만 아니라 부가적인 차원의 보안으로서 패킷에 포함되어 있는 송수신지의 네트워크 주소에도 적용될 수 있다.
유해정보탐지부(230)는 가상사설망의 내부에 위치한 네트워크 단말장치로부터 유입된 데이터 패킷에 대한 암호화가 수행되기 전 또는 가상사설망의 외부에 위치한 네트워크 단말장치로부터 유입된 데이터 패킷에 대한 복호화를 수행하여 가상사설망의 내부에 위치한 네트워크 단말장치로 복호된 데이터 패킷을 전달하기 전에 데이터 패킷의 유해성을 검색한다. 이 때, 유해정보탐지부(230)는 데이터 패킷에 웜(Worm), 바이러스(Virus) 해킹 코드 등이 존재하는지 여부를 검출한다. 유해정보탐지부(230)에 의한 유해정보의 검출시 적용되는 고속 비교 알고리즘은 본 고안이 속하는 기술분야에서 통상의 지식을 가진 자에게 널리 알려진 사항이며, 바이러스 치료 프로그램에 적용되는 알고리즘이 대표적인 예이다. 유해정보탐지부(230)는 데이터 패킷으로부터 유해정보가 검출되면 해당 데이터 패킷을 폐기하고, 이러한 사항을 네트워크 관리자에게 통지한다.
도 3은 본 고안에 따른 유해정보 탐지 및 방지 기능을 구비한 가상사설망 장치에서 데이터 패킷의 전송과정을 도시한 흐름도이다.
도 3을 참조하면, 가상사설망부(210)는 가상사설망의 내부에 위치한 네트워크 단말장치가 다른 가상사설망에 위치한 네트워크 단말장치로 통신을 요청하면, 해당 가상사설망에 존재하는 가상사설망 장치와의 사이에 터널을 구성한다(S300). 다음으로, 가상사설망부(210)는 통신을 요청한 네트워크 단말장치를 인증한 후 다른 가상사설망에 존재하는 가상사설망 장치에 인증을 요청한다(S310). 인증이 성공적으로 수행되면 가상사설망부(210)는 통신을 요청한 네트워크 장치로부터 데이터 패킷을 수신한다(S320). 다음으로, 유해정보탐지부(230)는 수신된 데이터 패킷의 유해성 여부를 검사하고(S330), 유해정보가 발견되면 해당 데이터 패킷을 폐기하고 네트워크 관리자에게 통지한다(S340). 이때 유해정보를 포함한 데이터 패킷의 발견사실의 통지과정은 장치의 설정상태에 따라 선택적으로 수행될 수 있다. 다음으로, 암호화/복호화부(220)는 유해정보가 발견되지 않는 데이터 패킷을 암호화한다(S350). 마지막으로, 가상사설망부(210)는 암호화된 데이터 패킷을 다른 가상사설망 장치로 전송한다(S360). 도 3에 도시된 바와 달리 다른 가상사설망에 존재하는 네트워크 장치로부터 데이터 패킷이 유입되는 경우에는 상술한 과정을 역순으로 수행된다.
이상에서 본 고안의 바람직한 실시예에 대해 도시하고 설명하였으나, 본 고안은 상술한 특정의 바람직한 실시예에 한정되지 아니하며, 청구범위에서 청구하는 본 고안의 요지를 벗어남이 없이 당해 고안이 속하는 기술분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변형 실시가 가능한 것은 물론이고, 그와 같은 변경은 청구범위 기재의 범위 내에 있게 된다.
본 고안에 따른 유해정보 탐지 및 방지 기능을 구비한 가상사설망 장치에 의하면, 송수신되는 정보의 암호화/복호화를 통해 비화통신을 가능하게 하는 동시에 정보의 유해성 여부를 분석하여 유해한 정보를 필터링함으로써 보안 침해, 해킹, 정보 유출 등의 보안 침해적인 요소를 제거하여 보다 안전한 통신을 제공할 수 있다. 이와 같이 비화통신기능과 유해정보차단기능을 하나의 통합된 장치에서 수행함으로써, 인터넷을 통한 정보의 도청 및 감청이 불가능한 시스템을 구축할 수 있으 며, 두개의 모뎀의 사용시 두개의 라인을 통하여 24x7의 중단없는 서비스를 제공할 수 있다.

Claims (1)

  1. 터널링 프로토콜과 보안 절차를 사용하여 공중망 기반시설을 기초로 데이터 네트워크를 구성하는 가상사설망부;
    상기 가상사설망부에 의해 구성된 제1가상사설망의 내부에 위치한 네트워크 단말장치로부터 유입된 데이터 패킷을 공중망을 통해 제2가상사설망의 내부에 위치한 목적지 단말장치로 송신하기 전에 상기 제1데이터 패킷을 암호화하고, 공중망을 통해 유입된 데이터 패킷을 상기 제1가상사설망의 내부에 위치한 네트워크 단말장치로 전달하기 전에 복호화하는 암호화/복호화부; 및
    상기 제1가상사설망의 내부에 위치한 네트워크 단말장치로부터 유입된 데이터 패킷에 대한 암호화가 수행되기 전 또는 상기 제1가상사설망의 외부에 위치한 네트워크 단말장치로부터 유입되어 복호화된 데이터 패킷을 상기 제1가상사설망의 내부에 위치한 네트워크 단말장치로 전달하기 전에 데이터 패킷의 유해성을 검사하고, 유해정보가 발견된 데이터 패킷을 폐기하는 유해정보탐지부;를 포함하는 것을 특징으로 하는 유해정보 탐지 및 방지 기능을 구비한 가상사설망 장치.
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