• The Journal of Korean Institute of Communications and Information Sciences
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• v.38B no.8
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• pp.654-662
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• 2013

Android applications can be easily decompiled owing to their structural characteristics, in which applications are developed using Java and are self-signed so that applications modified in this way can be repackaged. It will be crucial that this inherent vulnerability may be used to an increasing number of Android-based financial service applications, including banking applications. Thus, code obfuscation techniques are used as one of solutions to protect applications against their forgery. Currently, many of applications distributed on Android market are using ProGuard as an obfuscation tool. However, ProGuard takes care of only the renaming obfuscation, and using this method, the original opcodes remain unchanged. In this paper, we thoroughly analyze obfuscation mechanisms applied in ProGuard, investigate its limitations, and give some direction about its improvement.

• Journal of the Korean Society of Marine Environment & Safety
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• v.29 no.7
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• pp.879-886
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• 2023

The purpose of this study was to verify the relationship between job calling consciousness and job enthusiasm for the development of marine police izations and individuals. A study was conducted on 136 Korea Cost Guard officials. Sub-variables of vocational calling consciousness consisted of transcendent calling, the existence of purpose and meaning, and pro-social-oriented motivation, and job enthusiasm consisted of vitality, immersion, and dedication. As a result of the verification, it was found that transcendent calling, purpose, and meaning, which are sub-variables of occupational calling recognized by Korea Cost Guard officials, have a positive (+) effect on vitality, and commitment. However, it was found that pro-social-oriented motivation did not affect vitality, commitment, and immersion. Through the analysis results, practical implications of the maritime police ization were proposed.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.27 no.6
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• pp.1457-1465
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• 2017

With the growing of smart devices market, malicious behavior has gradually expanded its scope. Accordingly, many studies have been conducted to analyze malicious apps and automated analysis tools have been released. However these tools cause the side effects that the application protection tools such as ProGuard, DexGuard become vulnerable to analyzers or attackers. This paper suggests the protection mechanism to apply to the Android apps using security token, rather than general-purpose protection solutions that can be applied in malicious apps. The main features of this technique are that Android app is not properly loaded in the memory when the security token is abnormal or is not inserted and protected parts using the technique are not exposed.

• Korean journal of communication and information
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• v.45
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• pp.296-340
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• 2009

The power of media has always been problematic in the countries of full press freedom. Originally, the media used to be an effective vehicle for communication within human beings. However, it exerts an overwhelming power toward human society. Through applying the well-known four dog models in terms of media function, this study attempts to examine how the press media in South Korea transformed themselves into another powerful independent organization or institution after regime shift in 1987. The whole editorials of four sampled newspapers were analyzed through frame analysis model. The ChosunIlbo, known as a conservative and pro-government paper, shows to take the role of supporting chaebol policies under Roh TaeWoo Administration. However, it criticizing sharply against the chaebol policies of Roh MooHyun Administration. The JoongangIlbo, known as a pro-chaebol paper, appears anti-government position through the entire four administrations in terms of chaebol policies. Particularly, it reveals hostile editorial coverage during the Roh MooHyun Administration. However, KyunghyangShinmun, currently known as a liberal paper, viewed somewhat complicated positions (see text in more detail) because of its ownership turbulence during the past twenty years. On the other hand, Hangyoreh, regarded as a progressive paper, keeps in supportive attitude consistently against the four sampled administrations as far as regulating each government policies for chaebols.

• Proceedings of the KSME Conference
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• 2007.05a
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• pp.1179-1184
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• 2007

An unmaned surveillance robot consists of rifle, laser receiver, thermal imager, color CCD camera, and laser illuminator. A human guard can be replaced with such a robot to take care dangerous surveillance tasks. Currently most of surveillance robots are mounded at a fixed post to take care of surveillance tasks. In order to watch blind areas, it is necessary to modify such a surveillance robot to become a mobile robot. In this paper, simulation based design procedure of mobile surveillance robot has been introduced. 3D CAD geometry model has been produced using Pro-Engineer. Required pen and tilt motor capacities have been analyzed using ADAMS inverse dynamics analysis. A target tracking and stabilization control algorithm of the mobile surveillance robot has been developed in order to stabilize the system from the motion of the vehicle which experiences the rough terrain. ADAMS-Matlab co-simulation has been also carried out to validate the proposed target tracking and stabilization algorithm.

• The Journal of the Korea Contents Association
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• v.12 no.5
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• pp.380-392
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• 2012

The study of security personnel and psychological empowerment and organizational commitment to investigate the relationship between prosocial behavior in 2011 in Seoul, served in the private security companies after being selected as a security guard purposive sampling method using a 300 extracted samples, but the number of cases used in the study a total of 282 people. This study SPSSWIN 18.0 using factor analysis, reliability analysis, multiple regression analysis, path analysis, the following conclusions were obtained. First, psychological empowerment on organizational commitment affects. In other words, self-determination, job performance, impact, meaning a higher level of calculation ever higher levels of commitment and affective commitment. Second, the psychological empowerment influences prosocial behavior. In other words, self-determination, meaningfulness, influence job performance higher level of customer service and increases coordination Third, organizational commitment affects the prosocial behavior. In other words, the calculation ever commitment, emotional commitment, the higher the customer service, increases the level of coordination. Fourth, psychological empowerment and organizational commitment prosocial behavior direct and indirect impacts.