• International Journal of Computer Science & Network Security
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• 제23권5호
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• pp.179-192
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• 2023

The widespread use of Cloud Computing, Internet of Things (IoT), and social media in the Information Communication Technology (ICT) field has resulted in continuous and unavoidable cyber-attacks on users and critical infrastructures worldwide. Traditional security measures such as firewalls and encryption systems are not effective in countering these sophisticated cyber-attacks. Therefore, Intrusion Detection and Prevention Systems (IDPS) are necessary to reduce the risk to an absolute minimum. Although IDPSs can detect various types of cyber-attacks with high accuracy, their performance is limited by a high false alarm rate. This study proposes a new technique called Fuzzy Logic - Objective Risk Analysis (FLORA) that can significantly reduce false positive alarm rates and maintain a high level of security against serious cyber-attacks. The FLORA model has a high fuzzy accuracy rate of 90.11% and can predict vulnerabilities with a high level of certainty. It also has a mechanism for monitoring and recording digital forensic evidence which can be used in legal prosecution proceedings in different jurisdictions.

• 정보과학회 논문지
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• 제41권12호
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• pp.1035-1049
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• 2014

본 논문은 행위 온톨로지(Behavior Ontology)의 개념을 기반으로 한 보안-중심 시스템 안의 공격 패턴을 감지하기 위한 방법을 제안한다. 일반적으로 보안-중심 시스템들은 매우 규모가 크고 복잡하며, 가능한 모든 방법으로 공격자에 의해 공격된다. 그러므로, 공격 감지를 위한 몇 가지의 구조적 방법을 통해 다양한 공격들을 감지하는 것은 매우 복잡하다. 본 논문은 행위 온톨로지를 통하여 이러한 문제를 극복한다. 시스템 안의 공격의 패턴들은 시스템의 클래스 온톨로지에서 정의된 행동(Action)들을 순서에 따라 나열함으로써 정의된다. 공격 패턴이 행동들의 순서로 정의됨으로써 격자와 같이 포함관계를 기반으로 한 계층적인 순서로 추상화될 수 있다. 공격 패턴을 위한 행위 온톨로지가 정의되면, 대상 시스템 안의 공격들은 온톨로지의 구조 안에서 의미적이고 계층적으로 감지될 수 있다. 다른 공격 분석 모델들과 비교해보면, 본 논문에서의 행위 온톨로지를 통한 분석은 시간과 공간적으로 매우 효율적이고 효과적인 방법이다.

• 정보보호학회논문지
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• 제19권4호
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• pp.77-89
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• 2009

정보보호에 대한 인식이 제고되면서 정보보호 인력의 효율적인 양성 및 관리에 대한 다양한 연구가 수행되었다. 효율적인 인력양성을 위해서는 정보보호 인력이 직무수행을 위해 갖추어야 할 지식 및 기술 요구사항을 파악하여 교육프로그램의 개발 및 운영에 반영하는 것이 필요하다. 본 연구에서는 문헌고찰 및 델파이 방법을 통하여 정보보호 분야의 71개 요소 지식 및 기술을 도출하고 정보보호 전문인력을 대상으로 요소 지식 및 기술에 대한 필요정도 및 숙련정도를 조사하여, 정보보호 전문인력의 업무 경력에 따라 상대적으로 중요한 지식 및 기술을 도출하였다. 본 연구의 결과는 정보보호 전문인력의 경력 개발 단계별로 신규 교육 및 재교육이 필요한 요소 지식 및 기술을 제시함으로써, 산업체 및 교육기관에서 정보보호 교육 프로그램을 개발하고 운영할 때 활용될 수 있을 것으로 기대된다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제11권9호
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• pp.4588-4608
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• 2017

The measurement of information security levels is a very important but difficult task. So far, various measurement methods have studied the development of new indices. Note, however, that researches have focused on the problem of attaining a certain level but largely neglecting research focused on the issue of how different types of possible flaws in security controls affect each other and which flaws are more critical because of these effects. Furthermore, applying the same weight across the board to these flaws has made it difficult to identify the relative importance. In this paper, the interrelationships among security flaws that occurred in the security controls of K-ISMS were analyzed, and the relative impact of each security control was measured. Additionally, a case-control study was applied using empirical data to eliminate subjective bias as a shortcoming of expert surveys and comparative studies. The security controls were divided into 2 groups depending on whether or not a security flaw occurs. The experimental results show the impact relationship and the severity among security flaws. We expect these results to be applied as good reference indices when making decisions on the removal of security flaws in an enterprise.

• 산업경영시스템학회지
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• 제38권4호
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• pp.193-201
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• 2015

Corporation's valuable intelligent asset is being threatened from the skills of threatening subject that has been evolved along with the growth of the information system and the amount of the information asset. Domestically, attempts of various private information attacks, important information extortion, and information damage have been detected, and some of them have abused the vulnerability of security of information system, and have become a severe social problem that generates security incident. When accessing to the security, most of companies used to establish a strategy with a consistent manner and a solution plan. However, this is not a proper way. The order of priorities vary depending on the types of business. Also, the scale of damage varies significantly depending on the types of security incidents. And method of reaction and critical control point vary depending on the types of business and security incidents. In this study, I will define the security incidents by their types and preponderantly examine how one should react to those security incidents. In this study, analyzed many types of security accidents that can occur within a corporation and an organization considering various factors. Through this analysis, thought about factors that has to be considered by corporations and organizations when they intend to access to the information security. This study focuses on the response methodology based on the analysis of the case analysis of the leakage of industrial secret and private secret other than the conceptual response methodology that examines the way to prevent the leakage of the industry security systems and the industry information activities. And based on these factors, want to be of help for corporations to apply a reasonable approach when they establish a strategy to information security.

• 한국정보과학회논문지:시스템및이론
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• 제36권5호
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• pp.380-386
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• 2009

중요 IT 자산에 대한 보안성 강화를 위해서는 관련 위협(또는 취약점)의 식별 및 이에 대한 보안 대비책의 적정성 분석이 선행되어야 한다. 이를 위해 본 논문에서는 자산 및 위협에 기반한 보안 위험도 평가기법을 제안한다. 제안한 기법은 식별된 자산 및 위협 관련 공격시도 탐지와 취약점 점검 등의 대응 범위 및 수준의 사전 점검과 정량적인 위험도 평가를 제공함으로써 기존 연구에 비해 효과적으로 위협관리 업무에 활용될 것으로 기대된다.

• 한국경영정보학회:학술대회논문집
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• 한국경영정보학회 2007년도 International Conference
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• pp.646-651
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• 2007

Secure digital payment is critical in the successful shaping of global digital business. Digital payments are increasingly being used as a substitute to traditional payments, contributing markedly to the efficiency of the economy. The focus of every digital business transaction is to minimize risks arising from transactions. It is essential to ensure the security of digital payment whether used in internal networks or over wireless Internet. This paper analyses secure digital payment methods from the viewpoint of systemic security and transaction security. According to comparative analysis of digital payment models, this paper proposes a comparative analysis framework to investigate and evaluate secure digital payment. In conclusion, the comparative analysis framework, comparison of digital payment models and mobile payment models proposes a useful academic and practical foundation to enhance the understanding of secure digital payment methods. It also provides academic background and practical guidelines for the development of secure digital payment systems.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2010년도 춘계학술대회
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• pp.639-641
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• 2010

Healthcare applications involve complex structures of interacting processes and professionals that need to exchange information to provide the care services. In this kind of systems many different professional competencies, ethical and sensibility requirements as well as legal frameworks coexist and because of that the information managed inside the system should not be freely accessed, on the contrary. it must be subject to very complex privacy restrictions. This is particularly critical in distributed systems, where additionally, security in remote transmissions must be ensured. In this paper, we address the fundamental security issues that must be considered in design of a distributed healthcare application.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제17권5호
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• pp.1484-1502
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• 2023

The medical sector actively changes and implements innovative features in response to technical development and revolutions. Many of the most crucial elements in IoT-connected health services are safeguarding critical patient records from prospective attackers. As a result, BlockChain (BC) is gaining traction in the business sector owing to its large implementations. As a result, BC can efficiently handle everyday life activities as a distributed and decentralized technology. Compared to other industries, the medical sector is one of the most prominent areas where the BC network might be valuable. It generates a wide range of possibilities and probabilities in existing medical institutions. So, throughout this study, we address BC technology's widespread application and influence in modern medical systems, focusing on the critical requirements for such systems, such as trustworthiness, security, and safety. Furthermore, we built the shared ledger for blockchain-based healthcare providers for patient information, contractual between several other parties. The study's findings demonstrate the usefulness of BC technology in IoHT for keeping patient health data. The BDSA-IoHT eliminates 2.01 seconds of service delay and 1.9 seconds of processing time, enhancing efficiency by nearly 30%.

• 정보보호학회논문지
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• 제29권2호
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• pp.365-375
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• 2019

PLC(Programmable Logic Controller)는 안전 지향 제어시스템(safety-critical control system)을 위한 실시간 임베디드 제어 애플리케이션들을 지원하는 고신뢰성의 산업용 디지털 컴퓨터이다. PLC의 실시간 제약조건을 만족시키기 위하여 uC/OS 등의 실시간 운영체제들이 구동되고 있다. PLC들이 산업제어 시스템 등에 널리 보급되고 인터넷에 연결됨에 따라, PLC 시스템을 대상으로 한 사이버 공격들이 증대되고 있다. 본 논문에서는, 통합 개발 환경(IDE)에서 개발된 프로그램이 PLC로 다운로드 되기 전에 실행 코드를 분석하여 취약성을 완화시켜 주는 "실행코드 새니타이저(sanitizer)"를 제안한다. 제안기법은, PLC 프로그램 개발 중에 포함되는 취약한 함수들과 잘못된 메모리 참조를 탐지한다. 이를 위해 취약한 함수 DB 및 이상 포인터 연산과 관련된 코드 패턴들의 DB를 관리한다. 이들 DB를 기반으로, 대상 실행 코드 상에 취약 함수들의 포함 여부 및 포인터 변수의 이상 사용 패턴을 탐지 제거한다. 제안 기법을 구현하고 실험을 통해 그 유효성을 검증하였다.