• 디지털산업정보학회논문지
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• 제16권1호
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• pp.99-109
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• 2020

In the past, conservative concepts have been applied in terms of the characteristic of nuclear power plants(NPPs), resulting in analog-based equipment and closed networks. However, as digital technology has recently been applied to the design, digital-based facilities and communication networks have been used in nuclear power plants, increasing the risk of cybersecurity than using analog-based facilities. Nuclear power plant facilities are divided into a safety system and a non-safety system. It is essential to identify the difference and cope with cybersecurity threats to the safety system according to its characteristics. In this paper, we examine the cybersecurity regulatory guidelines for safety systems in nuclear power plant facilities. Also, we analyze cybersecurity threats to a programmable logic controller of the safety system and suggest cybersecurity requirements be applied to it to respond to the threats. By implementing security functions suitable for the programmable logic controller according to the suggested cybersecurity requirements, regulatory guidelines can be satisfied, and security functions can be extended according to other system requirements. Also, it can effectively cope with cybersecurity attacks that may occur during the operation of nuclear power plants.

• International Journal of Internet, Broadcasting and Communication
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• 제16권2호
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• pp.1-9
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• 2024

As the Internet of Things (IoT) continues to permeate every facet of modern life, the imperative to secure this vast and dynamic frontier becomes increasingly paramount. This presents a comprehensive exploration of the challenges and opportunities inherent in safeguarding the interconnected web of IoT devices. The research critically examines the limitations of current cybersecurity measures through an extensive review of diverse topics, including IoT network performance, smart grid security, and the escalating cyber threats against critical infrastructures. A meticulous analysis of research findings underscores the need for enhanced infrastructure and ongoing research to fortify the cybersecurity mechanisms surrounding IoT objects. We underline the imperative of relentless research efforts to parry the advancing threats and leverage the promise of nascent technologies. Our findings affirm the pivotal influence of robust cybersecurity measures in crafting a resiliently connected ecosystem. The paper underscores the importance of ongoing research to address evolving threats and harness the potential of emerging technologies, reaffirming the central role of cybersecurity in shaping a secure interconnected world. In conclusion, the study emphasizes the dynamic and ever-evolving nature of cybersecurity on the IoT frontier. It unveils a complex landscape of challenges, ranging from network performance intricacies to the security concerns of critical infrastructures.

• 디지털산업정보학회논문지
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• 제18권2호
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• pp.39-48
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• 2022

The application of digital technology to instrumentation and control systems in nuclear power plants has overcome many shortcomings of analog technology, but the threat of cybersecurity has increased. Along with other systems, the reactor protection system also uses digital-based equipment, so responding to cybersecurity threats is essential. We generally determine cybersecurity threats according to the role and function of the system. However, since the instrumentation and control system has various systems linked to each other, it is essential to analyze cybersecurity threats together between the connected systems. In this paper, we analyze the cybersecurity threat of the reactor protection system with the associated facilities. To this end, we quantitatively identified the risk of the reactor protection system by considering safety functions, a communication type, the use of analog or digital-based equipment of the associated systems, and the software vulnerability of the configuration module of the reactor protection system.

• 융합보안논문지
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• 제24권3호
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• pp.187-193
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• 2024

AI와 IoT의 발전으로 사이버 보안 위협은 급격히 증가하고 있다. 사이버 공격의 수단과 목적이 진화함에 따라 대학도 모든 주요 산업과 마찬가지로 심각한 사이버 보안 문제에 직면하고 있는 상황이다. 대학은 학생들의 개인정보, 연구 데이터, 지적 재산 등 방대한 양의 민감한 정보를 보유하고 있어 사이버 위협의 주요 대상이 된다. 이에 본 논문에서는 대학의 기관장과 정책 입안자들이 사이버 보안 태세를 강화하는데 도움이 되는 제도 및 기술적 관점에서의 사이버 보안 전략을 제시하고자 한다. 연구에서는 지금까지의 사이버 공격 흐름을 통해 동향을 검토하고, 랜섬웨어 및 AI 기반 맬웨어와 같은 고도화된 위협 증가에 대응하기 위해 거버넌스, 정책 개발, 위험 관리 및 FIDO와 AI 기반 기술적 보안 시스템 구축을 제시한다.

• International Journal of Computer Science & Network Security
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• 제21권12호
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• pp.123-130
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• 2021

Cybersecurity has been vital for decades and will remain vital with upcoming ages with new technological developments. Every new day brings advancement in technology, which leads to new horizons, and at the same time, it brings new security challenges. Numerous researchers around the globe are continuously striving hard to provide better solutions for the daily basis of new arising security issues. However, the challenges are always there. These challenges become new norms during the current Covid pandemic, where most industries, small industrial enterprises, education, finance, public sectors, etc. were under several attacks and threats globally. The hacker has more opportunities during the pandemic period by shifting most of the operations live. This research enlightened the several cybersecurity attacks and threats during this pandemic time globally. It provided the best possible recommendations to avoid them using the cyber awareness and with appropriately linked training. This research can provide a guideline to the above stated sector by identifying the related attacks.

• 융합보안논문지
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• 제13권4호
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• pp.3-10
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• 2013

사이버공격은 단순 범죄의 차원을 넘어 테러의 성격을 보이고 있으며 국가안보를 위협하고 있다. 오늘날 사이버안보 위협 양상은 국가 기밀과 개인정보의 유출 및 확산, 기반시설 제어시스템에 대한 직접적인 공격의 현실화, 정치 사회적 목적을 지닌 핵티비즘 대두 등으로 나타나고 있으며, 한국의 경우는 남북분단에 따른 북한의 위협이라는 특수한 상황이 더해져 있다. 따라서 사이버공격을 국가안보적 측면에서 다루면서 사이버안보 추진체계를 점검하고 문제점을 확인하여 개선해야 한다. 정부는 국가 사이버안보 종합대책을 발표하는 등 노력을 기울이고 있으나 제도적으로 미흡한 점이 있다. 사이버안보 추진체계의 제도적 개선을 위한 과제로는 관계부처 기관 역할의 법적 근거 정비, 국가차원 합동대응 강화, 정보공유 체계 정립 및 활성화, 산업육성 및 인력양성을 통한 기반조성, 연구개발 강화를 통한 방어수단 확보 등이 있다. 이러한 과제를 해결하기 위해서는 관련 법률의 제 개정에 많은 관심을 기울이고 법제도 개선을 실천하여야 한다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제10권2호
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• pp.857-880
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• 2016

Due to an increasing number of cyberattacks globally, cybersecurity has become a crucial part of national security in many countries. In particular, the Digital Pearl Harbor has become a real and aggressive security threat, and is considered to be a global issue that can introduce instability to the dynamics of international security. Against this context, the cyberattacks that targeted nuclear power plants (NPPs) in the Republic of Korea triggered concerns regarding the potential effects of cyber terror on critical infrastructure protection (CIP), making it a new security threat to society. Thus, in an attempt to establish measures that strengthen CIP from a cybersecurity perspective, we perform a case study on the cyber-terror attacks that targeted the Korea Hydro & Nuclear Power Co., Ltd. In order to fully appreciate the actual effects of cyber threats on critical infrastructure (CI), and to determine the challenges faced when responding to these threats, we examine factual relationships between the cyberattacks and their responses, and we perform analyses of the characteristics of the cyberattack under consideration. Moreover, we examine the significance of the event considering international norms, while applying the Tallinn Manual. Based on our analyses, we discuss implications for the cybersecurity of CI in South Korea, after which we propose a framework for strengthening cybersecurity in order to protect CI. Then, we discuss the direction of national policies.

• 디지털산업정보학회논문지
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• 제17권1호
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• pp.35-44
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• 2021

With the development of information technology, the cybersecurity threat continues as digital-related technologies are applied to the instrumentation and control system of nuclear power plants. The malfunction of the instrumentation and control system can cause economic damage due to shutdown, and furthermore, it can lead to national disasters such as radioactive emissions, so countering cybersecurity threats is an important issue. In general, the study of cybersecurity in instrumentation and control systems is concentrated on safety systems, and diverse protection systems perform protection and reactor shutdown functions, leading to reactor shutdown or, in the worst case, non-stop situations. To accurately analyze cyber threats in the diverse protection system, its linked facilities should be analyzed together. Risk analysis should be conducted by analyzing the potential impact of inter-facility cyberattacks on related facilities and the impact of cybersecurity on each configuration module of the diverse protection system. In this paper, we analyze the linkage of the diverse protection system and discuss the cybersecurity linkage threat by analyzing the availability of equipment, the cyber threat impact of the linked equipment, and the configuration module's cybersecurity vulnerability.

• ETRI Journal
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• 제44권6호
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• pp.991-1003
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• 2022

Industrial control systems (ICSs) used to be operated in closed networks, that is, separated physically from the Internet and corporate networks, and independent protocols were used for each manufacturer. Thus, their operation was relatively safe from cyberattacks. However, with advances in recent technologies, such as big data and internet of things, companies have been trying to use data generated from the ICS environment to improve production yield and minimize process downtime. Thus, ICSs are being connected to the internet or corporate networks. These changes have increased the frequency of attacks on ICSs. Despite this increased cybersecurity risk, research on ICS security remains insufficient. In this paper, we analyze threats in detail using STRIDE threat analysis modeling and DREAD evaluation for distributed control systems, a type of ICSs, based on our work experience as cybersecurity specialists at a refinery. Furthermore, we verify the validity of threats identified using STRIDE through case studies of major ICS cybersecurity incidents: Stuxnet, BlackEnergy 3, and Triton. Finally, we present countermeasures and strategies to improve risk assessment of identified threats.

• 정보보호학회논문지
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• 제30권6호
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• pp.1167-1187
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• 2020

해킹, 말웨어, 자료 유출 및 도난 등의 사이버 위협은 생활 및 경제, 국가 안보의 중요한 문제가 될 정도로 일상과 밀접한 상황에 직면하고 있다. 국가·산업 차원의 안보 및 경제적 관점에서 사이버 위협 대응은 필수적인 방어책으로 인식하고 있으나, 사이버보안 분야에서의 산·학 기술격차 및 전문인력 부족 문제는 매우 심각한 상황이다. 본 논문에서는 이를 극복하는 방법으로 사이버보안 인력의 직무 역량 개념을 도입하여 사이버보안 기술적 대응 직무 역량(CtrJC) 프레임워크를 제안하고, 국가 및 조직 차원에서 시급히 요구되는 실시간 사이버 위협 대응 기술적 직무 역량(CtrJC-R) 모델을 구현하여 그 타당성을 확인한다.