• KSII Transactions on Internet and Information Systems (TIIS)
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• v.18 no.1
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• pp.233-262
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• 2024

Due to the rapid evolution of vehicular ad hoc networks (VANETs), effective communication and security are now essential components in providing secure and reliable vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) communication. However, due to their dynamic nature and potential threats, VANETs need to have strong security mechanisms. This paper presents a novel approach to improve VANET security by combining the Vehicular Delay-Tolerant Network (VDTN) protocol with the Deep Reinforcement Learning (DRL) technique known as the Twin Delayed Deep Deterministic Policy Gradient (TD3) algorithm. A store-carry-forward method is used by the VDTN protocol to resolve the problems caused by inconsistent connectivity and disturbances in VANETs. The TD3 algorithm is employed for capturing and detecting Worm Hole Attack (WHA) behaviors in VANETs, thereby enhancing security measures. By combining these components, it is possible to create trustworthy and effective communication channels as well as successfully detect and stop rushing attacks inside the VANET. Extensive evaluations and simulations demonstrate the effectiveness of the proposed approach, enhancing both security and communication efficiency.

• Journal of the Korea Computer Industry Society
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• v.5 no.4
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• pp.427-434
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• 2004

Attacks such as hacking, a virus intimidating a system and a network are increasing recently. However, the existing system security or network management system(NMS) cannot be safe on various threats. Therefore, Firewall, IDS, VPN, LAS(Log Analysis System) establishes security system and has defended a system and a network against a threat. But mutual linkage between security systems was short and cannot prepare an effective correspondence system, and inefficiency was indicated with duplication of security. Therefore, an active security and an Enterprise Security Management came to need. An effective security network was established recently by Enterprise Security Management, Intrusion Tracking, Intrustion Induction. But an internetworking is hard for an enterprise security systems, and a correspondence method cannot be systematic, and it is responded later. Therefore, we proposes the active enterprise security management module that can manage a network safely in this paper.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.25 no.1
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• pp.61-73
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• 2015

In order to respond quickly to security threats that are increasing fast and variously, security control personnel needs to understand the threat of a massive amount of logs generated from security devices such as firewalls and IDS. However, due to the limitations of the information processing capability of humans, it takes a lot of time to analyze the vast amount of security logs. As a result, there is problem that the detection and response of security threats are delayed. Visualization technique is an effective way to solve this problem. This paper visualizes the security log using the RGB Palette, offering a quick and effective way to know whether the security threat is occurred. And it was applied empirically in VAST Challenge 2012 dataset.

• Convergence Security Journal
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• v.18 no.5_1
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• pp.75-81
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• 2018

As industries converge in recent years, the impact of the use of convergence tools among industries on the security of the organization is increasing. However, organizational members lack the ability to adapt to introduction of new system because they are operating business around existing systems, and thus, security considerations are an environment that will inevitably emerge as a follow-up priority. In this study, we studied cost-effective options for factors that should be considered first in order to establish a security system for small and medium-sized healthcare institutions in the healthcare convergence industry. Specifically, the current legal system was considered and the security status was analyzed through prior research, and the necessary security solution/system was derived from small and medium-sized healthcare institutions. In addition, it analyzed relative priorities for cost-efficient deployment of security systems to those involved in small and medium-sized healthcare institutions in actual business environments and presented measures to establish a overall security.

• The Journal of Information Systems
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• v.29 no.4
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• pp.57-76
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• 2020

Purpose Although examining the antecedents of employees' extra-role behavior (i.e. information security participation behavior) in the information security context is significant for researchers and practitioners, most behavioral security studies have focused on employees' in-role behavior (i.e. information security policy compliance). Thus, this research addresses this gap by investigating how organizational information security climate influences information security participation behavior based on social information processing theory and Griffin and Neal's safety model. Design/methodology/approach We developed a research model by applying Griffin and Neal's safety model to the information security context and then tested our research model by conducting an online survey for employees of organizations with information security policies. Structural equation modeling (SEM) with SmartPLS 3.3.2 is used to test the corresponding hypothesis. Findings Our results show that organizational information security climate, information security knowledge, information security motivation are effective in motivating information security participation behavior. Also, we find that organizational information security climate positively influences both information security knowledge and information security motivation. Our findings emphasize the importance of organizational information security climate because it is capable of affecting employees on information security participation behavior. Our study contributes to the literature on information security by exploring the role of organizational information security climate in enhancing employees' information security participation behavior.

• Korean Security Journal
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• no.7
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• pp.29-59
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• 2004

This is a study on hostage crisis and effective resolution of the crisis. First, we surveyed the theoretical guidance for our study: definition, patterns, of hostage crisis; psychology of hostage-takers. And we explores a great variety of hostage crisis cases to develop principles and methods for negotiation and subjugation. We suggest, throughout this study, some action program to be developed, as follow: First, we need to broaden and deepen the understanding on the issue of hostage-crisis by expanding educational opportunity on the issue, while raising hostage negotiators. Second, information sharing system among hostage management related offices, and complete training for SWAT team are required. Third, when a hostage-crisis is raised, police enforcement must corporate with mass-media in a way of close manner. Fourth, in a critical hostage crisis, the commander should appear on site for effective command. Lastly, the top-priority for the commander who is in charge of the crisis should be put on the security of hostage and hostage-taker, as well.

• Journal of Korea Multimedia Society
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• v.21 no.1
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• pp.61-68
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• 2018

In this paper, we present an effective encryption algorithm for 3D printing models in the frequency domain of discrete cosine transform to prevent illegal copying, access in the secured storage and transmission. Facet data of 3D printing model is extracted to construct a three by three matrix that is then transformed to the frequency domain of discrete cosine transform. The proposed algorithm is based on encrypting the DC coefficients of matrixes of facets in the frequency domain of discrete cosine transform in order to generate the encrypted 3D printing model. Experimental results verified that the proposed algorithm is very effective for 3D printing models. The entire 3D printing model is altered after the encryption process. The proposed algorithm is provide a better method and more security than previous methods.

• Proceedings of the Korean Information Science Society Conference
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• 2007.10a
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• pp.118-119
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• 2007

• Korean Security Journal
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• no.4
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• pp.319-341
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• 2001

Most of protecting security activity is carried out by manpower partly by security equipment. The protecting security market and the area of protecting security activity is increasing in spite of change of economic and social environment situation. For more effective protecting security activity, the coordination of electronic equipment and manpower is required. So some application method is suggested throughout the thesis, which is especially focused on new approaching method. The integration of intrusion detecting system, C.C.TV system and Access control system is introduced for general application in chapter III, and some application systems are proposed for protecting security activity in chapter IV. But the security equipment is only aid for manpower, so manpower and equipment should be coordinated well.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2013.05a
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• pp.256-259
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• 2013

Data and network security for e-Healthcare Systems are a primary concern due to the easiest deployment area accessibility of the sensor devices. Furthermore, they are often interacting closely in cooperation with the physical environment and the surrounding people, where such exposure increases security vulnerabilities in cases of improperly managed security of the information sharing among different healthcare organizations. Hence, healthcare-specific security standards such as authentication, data integrity, system security and internet security are used to ensure security and privacy of patients' information. This paper discusses security threats on e-Healthcare Systems where an attacker can access both data and network using masquerade attack. Moreover, an efficient and cost effective approach for countermeasures is discussed for the delivery of secure services.