중소기업환경에서 적용 가능한 IEC 62443 기반의개발 보안 생애주기 프로세스 적용 방안 연구
A Study on Application Methodology of SPDL Based on IEC 62443 Applicable to SME Environment
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SME(small and medium-sized enterprise) 환경의 스마트제조 환경에서는 실제 제조라인에서 동작하는 센서(Sensor) 및 액추에이터(Actuator)와이를 관리하는 PLC(Programmable Logic Controller), 더불어 그러한 PLC를 제어 및 관리하는 HMI(Human-Machine Interface), 그리고 다시PLC와 HMI를 관리하는 OT(Operational Technology)서버로 구성되어 있으며, 제어자동화를 담당하는 PLC 및 HMI는 공장운영을 위한 응용시스템인 OT서버 및 현장 자동화를 위한 로봇, 생산설비와의 직접적인 연결을 수행하고 있어서 스마트제조 환경에서 보안 기술의 개발이 중점적으로필요한 영역이다. 하지만, SME 환경의 스마트제조에서는 과거의 폐쇄 환경에서 동작하던 시스템으로 구성되어 있는 경우가 상당하여 인터넷을통해 외부와 연동되어 동작하게 되는 현재의 환경에서는 보안에 취약한 부분이 존재한다. 이러한 SME 환경의 스마트제조 보안 내재화를 이루기위해서는, 스마트제조 SW 및 HW 개발 단계에서 IEC 62443-4-1 Secure Product Development Lifecycle에 따른 프로세스 정립 및 IEC 62443-4-2Component 보안 요구사항과 IEC 62443-3-3 System 보안 요구사항에 적합한 개발 방법론의 도입이 필요하다. 따라서, 본 논문에서는 SME 환경에서의 스마트제조에 보안 내재화를 제공하기 위한 IEC 62443 기반의 개발 보안 생애주기 프로세스에 대한 적용 방안을 제안한다.
Abstract
In a smart factory environment in a small and medium-sized enterprise (SME) environment, sensors and actuators operating on actualmanufacturing lines, programmable logic controllers (PLCs) to manage them, human-machine interface (HMI) to control and manage suchPLCs, and consists of operational technology server to manage PLCs and HMI again. PLC and HMI, which are in charge of controlautomation, perform direct connection with OT servers, application systems for factory operation, robots for on-site automation, andproduction facilities, so the development of security technology in a smart factory environment is demanded. However, smart factoriesin the SME environment are often composed of systems that used to operate in closed environments in the past, so there exist a vulnerablepart to security in the current environment where they operate in conjunction with the outside through the Internet. In order to achievethe internalization of smart factory security in this SME environment, it is necessary to establish a process according to the IEC 62443-4-1Secure Product Development Life cycle at the stage of smart factory SW and HW development. In addition, it is necessary to introducea suitable development methodology that considers IEC 62443-4-2 Component security requirements and IEC 62443-3 System securityrequirements. Therefore, this paper proposes an application plan for the IEC 62443 based development security process to provide securityinternalization to smart factories in an SME environment.
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