• KSII Transactions on Internet and Information Systems (TIIS)
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• v.12 no.12
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• pp.6057-6078
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• 2018

Smart home systems provide a safe, comfortable, and convenient living environment for users, whereby users enjoy featured home services supported by the data collected and generated by smart devices in smart home systems. However, existing smart devices lack sufficient protection in terms of data security and privacy, and challenging security and privacy issues inevitably emerge when using these data. This article aims to address these challenging issues by proposing a private blockchain-based access control (PBAC) scheme. PBAC involves employing a private blockchain to provide an unforgeable and auditable foundation for smart home systems, that can thwart illegal data access, and ensure the accuracy, integrity, and timeliness of access records. A detailed security analysis shows that PBAC could preserve data security against various attacks. In addition, we conduct a comprehensive performance evaluation to demonstrate that PBAC is feasible and efficient.

• Informatization Policy
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• v.26 no.2
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• pp.62-80
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• 2019

The purpose of this study is to investigate the direct effect of victimization experience on cyber security behavior and the indirect effect of information protection awareness through the Dual Process Theory. Baron & Kenny regression analysis was conducted and the results are as follows - first, victimization experience has a positive effect on cyber security behavior; second, the relationship between victimization experience and cyber security behavior is mediated by cyber security awareness; and third, the direct effect of victimization experience on cyber security behavior and the indirect mediating effect of cyber security awareness are both positive (+). The direct effect of victimization experience on cyber security behavior is analyzed to be relatively large compared to the indirect effect that cyber security awareness has on cyber security behavior. Based on these results, It is suggested that periodic cyber security education and campaign policies are needed to enhance cyber security behavior.

• The Journal of Society for e-Business Studies
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• v.20 no.3
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• pp.1-10
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• 2015

The main objective of this study was to identify the factors that can maximize the effect of preventing technology leakage by government support. Therefore we used the 2013 small business technology protection capabilities and level of research which is conducted by the Small and Medium Business Administration, and have analyzed the presence of small business technological assets leakage protection eand skills. Multiple logistic regression analysis was performed to identify 1,518 small companies (43 big companies are excluded) which are divided into 155 technological assets leaked small business and non-leaked 1363 small business. The most important factors associated with technology leakage were entrant control system, security audit, employee absence of security activities and important data protection measures. This result shows that if the government can support more for these details, technological asset leakage prevention effect is expected to be maximized.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.10 no.3
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• pp.1229-1248
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• 2016

With the feature of convenience and low cost, remote healthcare monitoring (RHM) has been extensively used in modern disease management to improve the quality of life. Due to the privacy of health data, it is of great importance to implement RHM based on a secure and dependable network. However, the network connectivity of existing RHM systems is unreliable in disaster area because of the unforeseeable damage to the communication infrastructure. To design a secure RHM system in disaster area, this paper presents a Secure VANET-Assisted Remote Healthcare Monitoring System (SVC) by utilizing the unique "store-carry-forward" transmission mode of vehicular ad hoc network (VANET). To improve the network performance, the VANET in SVC is designed to be a two-level network consisting of two kinds of vehicles. Specially, an innovative two-level key management model by mixing certificate-based cryptography and ID-based cryptography is customized to manage the trust of vehicles. In addition, the strong privacy of the health information including context privacy is taken into account in our scheme by combining searchable public-key encryption and broadcast techniques. Finally, comprehensive security and performance analysis demonstrate the scheme is secure and efficient.

• Korean Security Journal
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• no.18
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• pp.169-190
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• 2009

Today, the rapid advance of scientific technologies has brought about fundamental changes to the types and levels of terrorism while the war against the world more than one thousand small and big terrorists and crime organizations has already begun. A method highly likely to be employed by terrorist groups that are using 21st Century state of the art technology is cyber terrorism. In many instances, things that you could only imagine in reality could be made possible in the cyber space. An easy example would be to randomly alter a letter in the blood type of a terrorism subject in the health care data system, which could inflict harm to subjects and impact the overturning of the opponent's system or regime. The CIH Virus Crisis which occurred on April 26, 1999 had significant implications in various aspects. A virus program made of just a few lines by Taiwanese college students without any specific objective ended up spreading widely throughout the Internet, causing damage to 30,000 PCs in Korea and over 2 billion won in monetary damages in repairs and data recovery. Despite of such risks of cyber terrorism, a great number of Korean sites are employing loose security measures. In fact, there are many cases where a company with millions of subscribers has very slackened security systems. A nationwide preparation for cyber terrorism is called for. In this context, this research will analyze the current status of Korea's cyber security systems and its laws from a policy perspective, and move on to propose improvement strategies. This research suggests the following solutions. First, the National Cyber Security Management Act should be passed to have its effectiveness as the national cyber security management regulation. With the Act's establishment, a more efficient and proactive response to cyber security management will be made possible within a nationwide cyber security framework, and define its relationship with other related laws. The newly passed National Cyber Security Management Act will eliminate inefficiencies that are caused by functional redundancies dispersed across individual sectors in current legislation. Second, to ensure efficient nationwide cyber security management, national cyber security standards and models should be proposed; while at the same time a national cyber security management organizational structure should be established to implement national cyber security policies at each government-agencies and social-components. The National Cyber Security Center must serve as the comprehensive collection, analysis and processing point for national cyber crisis related information, oversee each government agency, and build collaborative relations with the private sector. Also, national and comprehensive response system in which both the private and public sectors participate should be set up, for advance detection and prevention of cyber crisis risks and for a consolidated and timely response using national resources in times of crisis.

• The International Journal of Costume Culture
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• v.3 no.3
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• pp.201-211
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• 2000

The purpose of this study is to pinpoint currently arising issues concerning cyber fashion mall by analysing present status and contents of its web design, management and planning within the limits o business to customer (B2C) commerce, and to suggest a direction for building an ideal fashion mall on the internet. As for the study method, conceptual definitions were given based on previous studies. And a positive study was implemented, in which the cases of 23 chosen cyber fashion malls among 60 or so domestic and foreign malls selling fashion products were found by internet search engines and analysed. Results of the case analysis of cyber fashion malls are as follows : 1) cybermall must provide customers with an integrated service as well as e-commerce. 2) various products assortment and price differentiation must be developed, 3) the techniques of graphics, coloring and texturing, and layout design must be adopted to process and express product information, 4) the legislative system is needed to deal with the security, and 5) design and management of customer oriented interface are needed to process and express product information matter of electronic payment and customer protection. Considering the issues in internet fashion cybermalls, are suggested the important factors that are necessary or web design, planning and management to build an ideal cyber fashion mall. These results will contribute to the development of fashion e-commerce.

• Journal of the Korean Society of Systems Engineering
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• v.14 no.2
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• pp.73-82
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• 2018

In this work, a hardware based cryptographic module for the cyber security of nuclear power plant is developed using a system engineering approach. Nuclear power plants are isolated from the Internet, but as shown in the case of Iran, Man-in-the-middle attacks (MITM) could be a threat to the safety of the nuclear facilities. This FPGA-based module does not have an operating system and it provides protection as a firewall and mitigates the cyber threats. The encryption equipment consists of an encryption module, a decryption module, and interfaces for communication between modules and systems. The Advanced Encryption Standard (AES)-128, which is formally approved as top level by U.S. National Security Agency for cryptographic algorithms, is adopted. The development of the cyber security module is implemented in two main phases: reverse engineering and re-engineering. In the reverse engineering phase, the cyber security plan and system requirements are analyzed, and the AES algorithm is decomposed into functional units. In the re-engineering phase, we model the logical architecture using Vitech CORE9 software and simulate it with the Enhanced Functional Flow Block Diagram (EFFBD), which confirms the performance improvements of the hardware-based cryptographic module as compared to software based cryptography. Following this, the Hardware description language (HDL) code is developed and tested to verify the integrity of the code. Then, the developed code is implemented on the FPGA and connected to the personal computer through Recommended Standard (RS)-232 communication to perform validation of the developed component. For the future work, the developed FPGA based encryption equipment will be verified and validated in its expected operating environment by connecting it to the Advanced power reactor (APR)-1400 simulator.

• Proceedings of the Korean Society of Disaster Information Conference
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• 2022.10a
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• pp.423-424
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• 2022

본 연구에서는 미국의 국가핵심기반보호제도의 변화에 대해 고찰하고 시사점을 도출한다. 이를 위해 9/11 테러 공격 이후 국가핵심기반보호계획(National Infrastructure Protection Plan)을 중심으로 관련 법률 및 제도와 조직변화를 추적하고 고찰하였고, 이들의 관계를 도식화하여 타임라인(timeline)분석을 실시하였다. 본 연구를 통해 국토안보대통령령-8호(HSPD-8), 대통령령-21호(PDD-21), 사이버보안과 핵심기반법(Cybersecurity & Infrastructure Act)등의 관련 법제 변화를 통해 총 3가지 버전의 NIPP이 있음을 확인할 수 있었으며, 2018년에 사이버보안과 주요인프라청(CISA)이 창설되어 국가핵심기반보호제도업무를 이곳으로 이관하여 운영되고 있음을 알 수 있었다. 또한 국가핵심기반을 보는 관점이 9/11 테러 공격 이후 주요 핵심기반 보호(Protection)에서 주요핵심기반의 복원력(Resilience)제고로 변화하고 있음을 도출하였다.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2005.11a
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• pp.126-135
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• 2005

• Informatization Policy
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• v.23 no.4
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• pp.38-58
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• 2016

The ever-evolving Internet environment along with changes in the mass media has been creating a new way of communicating in the virtual cyber world. The Internet users have more services at their disposal to communicate with ease. Such a new way of communication styles, however, makes them vulnerable to personal information leakage, increasing the concerns of cyber security. A thorny issue is how we can control the disclosure of personal information. Lately, the Korean government implemented privacy policies to resolve and prevent personal information leakage incidents that incur social problems. Here, we seek to identify problems in the privacy policies for better solutions.