• Journal of the Korea Society of Computer and Information
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• v.20 no.7
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• pp.49-56
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• 2015

In this paper, we introduce recent cloud system security technologies categorizing them according to Reliability, Availability, Serviceability, Integrity, and Security (RASIS), terms that evaluate robustness of the computer system. Then we describe examples of security attacks and corresponding security technologies for each of them. We introduce security technologies based on Software Defined Network (SDN) for Reliability, security technologies based on hypervisor and virtualization for Availability, disaster restoration systems for Serviceability, authorization and access control technologies for Integrity, and encryption algorithms for Security. We believe that this paper provide wise view and necessary information for recent cloud system security technologies.

• International Journal of Computer Science & Network Security
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• v.22 no.1
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• pp.199-205
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• 2022

The main purpose of the study is to analyze the main aspects of the impact of information and communication technologies on the economic security system in the context of a pandemic situation. The new realities of the modern turbulent world require a new approach to the issues of ensuring economic security, in which information and communication technologies and information security are beginning to play an increasingly important role. As a result of a detailed analysis of the further functioning of all components of economic security in the context of the existence of the consequences of the COVID-19 pandemic.

• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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• 2006.06a
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• pp.412-415
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• 2006

본 논문에서는 NTFS 파일시스템의 $LOGFILE을 활용하여 범인의 행동 흐름 파악 메커니즘을 제시한다. 기존에 Carrier, Brian에 의해 제시된 NTFS파일 시스템의 분석은 주로 할당되지 않은 $MFT의 분석을 통해서 이루어졌다.$^{[1]}$ 증거물을 포착하기 위해서 사용되었던 $MFT 분석 방식을 벗어나 $LOGFILE을 통해 범죄자의 파일에 대한 조작 행위의 순서를 파악한다.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.18 no.5
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• pp.1-8
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• 2018

The latest cyber attack utilizing advanced technologies is more rapidly advancing than developing speed of defense technology, thereby escalates the security risk. In responding to this recent threat, academia and industries are developing some sophisticated security technologies applying various methods. Based on these technologies, security systems are used in many fields. This article aims to select noticeable network security related technologies for the security systems. In particular, we compared and analyzed the trend, performance, and functions of both foreign and domestic technologies in regard to UTM having the largest portions among network security systems so far. We will also discuss the prospect for the change in network infrastructure due to the emergence of the next-generation network technology.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2008.02a
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• pp.63-65
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• 2008

저장장치는 기술의 발달로 인해 대용량화가 가속화 되었고 휴대하기 편리하게 되었다. 그 중 휴대용 저장장치로 USB 대용량 저장장치가 널리 쓰이고 있다. 더 나아가 프라이버시와 기업의 기밀, 기술정보 유출사고가 발생함에 따라 이러한 데이터를 보호하기 위해 보안기능을 제공하는 USB저장장치의 사용량이 증가하고 있다. 디지털 수사 측면에서 볼 때 이러한 USB의 보안기능은 용의자에 의해 데이터를 은폐할 목적으로 사용될 수 있다. 이러한 현재 상황에 비추어 볼 때 보안기능이 있는 USB(이하 보안 USB)에 포렌식 관점에서 중요한 증거물이 저장될 가능성이 높아졌으며, 증거로서 보안 USB를 획득하였을 때, 해당 USB에서 데이터를 획득하기 위한 대비책이 필요하다. 본 논문에서는 현재 보안 USB에 관한 동향 및 대처방안에 대해 논한다.

• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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• 2006.06a
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• pp.497-500
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• 2006

신상욱 등은 JCCI 2003에서 새로운 인증-암호화 모드 NAE를 제안하였다. NAE는 CFB 모드와 CTR 모드를 결합시킨 변형된 형태로, 하나의 기반이 되는 블록 암호 키를 가지고 최소한으로 블록 암호를 호출하여 기밀성과 무결성을 모두 제공한다. 이 모드는 CBC 암호화 모드와 CBC-MAC이 결합된 CCM 인증-암호화 모드보다 효율적이며, 기제안된 다른 인증-암호화 기법들과 유사한 성능을 가진다. 그러나 본 논문에서는 단순 암호문 조작으로 유효한 암호문-태그 쌍을 생성할 수 있음을 보인다.

• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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• 2006.06a
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• pp.397-402
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• 2006

디지털 범죄 수사 능력은 디지털 포렌식 기술 개발 뿐만 아니라 정책적인 수사체계가 얼마나 잘되어 있느냐에 따라 달라진다. 점차 다양화 되고 지능화 되어가는 디지털 범죄를 수사하기 위해서는 디지털 범죄 수사 체계 모델링이 필요하다. 따라서 본고에서는 디지털 범죄의 종류와 그에 적합한 수사 절차를 언급하고, UML(Unified Modeling Language)을 이용하여 디지털 범죄 수사 절차를 체계화하고 모델링하는 방법을 제시하고자 한다.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.26 no.1
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• pp.125-134
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• 2016

MySQL database is currently used by many users and It has gained a big market share in the database market. Even though MyISAM storage engine was used as a default storage engine before, but records recovery method does not existed. Deleted records have a high possibility for important evidence and it is almost impossible to determine that investigators manually examine large amounts of database directly. This paper suggests the universal recovery method for deleted records and presents the experimental results.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.15 no.1
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• pp.57-66
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• 2005

SHACAL-2 is a 256-bit block cipher with various key sizes based on the hash function SHA-2. Recently, it was recommended as one of the NESSIE selections. This paper presents differential-linear type attacks on SHACAL-2 with 512-bit keys up to 32 out of its 64 rounds. Our 32-round attack on the 512-bit keys variants is the best efficient attack on this cipher in published literatures.

• International Journal of Computer Science & Network Security
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• v.22 no.5
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• pp.204-214
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• 2022

Speedy development has been witnessed in communication technologies and the adoption of the Internet across the world. Information dissemination is the primary goal of these technologies. One of the rapidly developing nations in the Middle East is Saudi Arabia, where the use of communication technologies, including mobile and Internet, has drastically risen in recent times. These advancements are relatively new to the region when contrasted to developed nations. Thus, offenses arising from the adoption of these technologies may be new to Saudi Arabians. This study examines cyber security awareness among Saudi Arabian citizens in distinct settings. A comparison is made between the cybersecurity policy guidelines adopted in Saudi Arabia and three other nations. This review will explore distinct essential elements and approaches to mitigating cybercrimes in the United States, Singapore, and India. Following an analysis of the current cybersecurity framework in Saudi Arabia, suggestions for improvement are determined from the overall findings. A key objective is enhancing the nationwide focus on efficient safety and security systems. While the participants display a clear knowledge of IT, the surveyed literature shows limited awareness of the risks related to cyber security practices and the role of government in promoting data safety across the Internet. As the findings indicate, proper frameworks regarding cyber security need to be considered to ensure that associated threats are mitigated as Saudi Arabia aspires to become an efficient smart nation.