• Journal of the Korea Institute of Information Security & Cryptology
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• v.18 no.3
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• pp.61-68
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• 2008

In this paper, we propose a new method to assess fingerprint image quality. In the proposed method, analysis of local variance of image's gray values, local orientation, minutiae density, size and position is applied. Especially by using position information of inputted fingerprint images, partial fingerprint images are filtered and recognition performance is improved. In the experimental results, quality threshold value for improving performance can be decided by analysis of correlation between image quality and recognition rate.

• The Journal of Asian Finance, Economics and Business
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• v.9 no.2
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• pp.151-158
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• 2022

The study aims to investigate Lebanese-Chinese relations within the framework of the Belt and Road Initiative. Lebanon formally joined the effort in 2017; this paper emphasizes Lebanon's geostrategic importance. The paper presents an assessment of the investment risks in Lebanon, which is considered an economically unstable country with a volatile security situation, with many internal and external political hurdles. The paper refers to the obstacles and challenges that the Chinese investor may face in Lebanese society. The study employs qualitative descriptive analysis to address the status of Chinese investment in Lebanon and the consequences of this partnership; the paper examines previous research related to the Belt and Road Initiative and the Lebanese political, security, and economic situation literature. Due to the deteriorating security situation, external intervention, and the economic crisis, the results reveal that Lebanon is not a top investment priority for China, which is a big impediment to China entering into economic cooperation with Lebanon. The findings of this study suggest that the Lebanese government should adopt an anti-corruption policy to build confidence for the Chinese investor, reduce unnecessary public spending, and hold a national dialogue to build confidence among the Lebanese parties.

• Journal of Internet Computing and Services
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• v.12 no.5
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• pp.39-46
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• 2011

The user authentication on the security applications is one of the most important process. Because character based password is commonly used for user authentication, it is most important to protect the keyboard. Due to the reason, several software solutions for keyboard security have been applied to critical sites. This paper introduces vulnerabilities to the commonly used USB keyboard, implements a sample code using the vulnerabilities and evaluates the possibility for the keyboard data to be stolen in the guarded environment. Through the comparison of the result, a countermeasure to the vulnerabilities is proposed.

• Proceedings of the KIEE Conference
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• 2001.11b
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• pp.73-76
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• 2001

This paper presents a new systematic contingency selection, screening and ranking method for on-line transient security assessment. Transient stability of a particular generator is influenced most by fault near it. Fault at the transmission lines adjacent to the generators are selected as contingency. Two screening methods are developed using the sensitivity of modal synchronizing torque coefficient and computing an approximate critical clearing time(CCT) without time simulation. The first method, which considers only synchronizing power, may mislead in some cases since it does not consider the acceleration power. The approximate CCT method, which consider both the acceleration and deceleration power, worked well. Finally the Single Machine Equivalent(SIME) method is implemented using IPLAN of PSS/E for detailed stability analysis.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.26 no.3
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• pp.745-756
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• 2016

As infringement accidents of personal information have often occurred and estimates of damages are too large, the government introduces many certifications related with personal information management system for protecting personal information. Among them, PIMS and PIPL share many points in common, so many complaints about duplicate regulation have been suggested. This study evaluates the duplication of two certifications in order to examine redundancy between PIMS and PIPL both of which have been controversial.

• Proceedings of the KIEE Conference
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• summer
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• pp.91-93
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• 2004

This paper is to develope the fast screening algorithm for on line transient security assessment. All generators are represented in a classical model and stability index is defined as a ratio between acceleration power and deceleration power Critical machines and remaining machines are identified based on stability index and aggregated into two equivalent machines. And finally equivalent machines are reduced into OMIB system then CCT is computed. The Proposed algorithm is applied to the KEPCO system and obtained the reasonable results compared with TSA Tool.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.13 no.5
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• pp.69-79
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• 2003

We analyze key business process by using IDEF method in the perspective of business continuity, identify key information assets by using Skandia model, and use Nessus Version 1.4.2 to assess vulnerability about the sever of library information system according to OCTAVE(The Operationally Critical Threat, Asset, and Vulnerability Evaluation) approach. We suggest the vulnerability assessment case for introducing improved OCTAVE method including IDEF method and Skandia model.

• Journal of Software Assessment and Valuation
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• v.8 no.2
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• pp.45-51
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• 2012

This paper is to identify and assess vulnerabilities of services considering the nature of service layers for analyzing vulnerability of SOA security. It is a model driven approach which provides the way to present security requirements of the business model and identify the vulnerabilities of the services to extract the secure service model. We validate the proposed method with the analytic evaluation because the predictive nature of our methodology poses some specific challenges for its validation.

• Journal of the Korea Society of Computer and Information
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• v.16 no.10
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• pp.175-183
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• 2011

Performance of digital video watermarking is an assessment that hides a lot of information in digital videos. Therefore, it is required to find a way that enables to store lots of bits of data into a high quality video of the frequency area of digital contents. Hence, this paper designs a watermarking system improving security with an enhancing watermarking based on invisible watermarking and embedding an watermarking on LH and HL subband and its subband by transforming wavelet after the extraction of luminance component from the frames of video by compromising robustness and invisible of watermarking elements. The performance analysis of security of watermarking is carried out with a statistic method, and makes an assessment of robustness against variety of attacks to invisible watermarking. We can verify the security of watermarking against variety of attacks by testing robustness and invisible through carrying out general signal processing like noise addition, lossy compression, and Low-Pass filtering.

• Journal of Korean Society for Quality Management
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• v.48 no.1
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• pp.187-199
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• 2020

Purpose: This study suggests how to upgrade performance certification technology. Current performance certification of aviation security equipment and the requirements thereof were analyzed. Methods: The performance certification of aviation security equipment worldwide and identified issues with the domestic certification system were compared. The government must upgrade certification in terms of technical standards, the assessment methodology used, and the operating system. Results: Three principal conclusions were drawn. First, certification requirements must be based on a review of the technical literature and real-world experience. Second, development priorities must be set by reference to assessment techniques. Third, both research on the certification system and improvements thereof are essential. Conclusion: Certification of aviation security equipment performance requires gradual upgrading.