• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.9
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• pp.504-509
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• 2019

Recently, both wireless communications technology and the performance of small devices have developed exponentially, while the number of services using various types of Internet of Things (IoT) devices has also massively increased in line with the ongoing technological and environmental changes. Furthermore, ever more devices that were previously used in the offline environment-including small-size sensors and CCTV-are being connected to the Internet due to the huge increase in IoT services. However, many IoT devices are not equipped with security functions, and use vulnerable open source software as it is. In addition, conventional network equipment, such as switches and gateways, operates with vulnerabilities, because users tend not to update the equipment on a regular basis. Recently, the simple vulnerability of IoT devices has been exploited through the distributed denial of service (DDoS) from attackers creating a large number of botnets. This paper proposes a system that is capable of identifying Internet-connected devices quickly, analyzing and managing the vulnerability of such devices using Internet-wide scan technology. In addition, the vulnerability analysis rate of the proposed technology was verified through collected banner information. In the future, the company plans to automate and upgrade the proposed system so that it can be used as a technology to prevent cyber attacks.

• The Journal of Korean Association of Computer Education
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• v.16 no.2
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• pp.1-8
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• 2013

Internet ethics education in school is very necessary for young people to use the Internet properly and to be able to utilize information and communication technology well. However Internet ethics education for the would-be teachers is very insufficient. Therefore, it is very important that teacher training institutions to train teachers operates Internet ethics curriculum and teaches it to would-be teachers. In this paper, we analyzed the operating status about Internet ethics curriculum in teacher training institutions in which open a major in computer related education. As a result, only less than 30% of the entire teacher training institutions are operating to have the curriculum. So, in order to solve the problem, Internet ethics curriculum in teacher training institutions should be strengthened and we should have applied it to other curriculum in other major. In addition, training and retraining to the teachers for Internet ethics should be strengthened.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.9 no.12
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• pp.4739-4758
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• 2015

The IPv4 addressing scheme, which was proposed by IETF in 1981, provides 4.3 billion unique 32-bit IP addresses but has been fully exhausted in Feb, 2011. This exhaustion of unique IP addresses poses significant challenges to the addition of new devices to the Internet as well as offering new services. Internet of Things, which provides interconnected uniquely identifiable devices in the existing Internet infrastructure, will be greatly affected by the lack of unique IP addresses. In order to connect to the existing Internet infrastructure, every new device needs a uniquely identified IP address for communication. It has been estimated that by the year 2020 more than 30 billion devices would be connected to the Internet. In order to meet the challenge of such vast requirement of unique IP addresses, the devices in IoT will have to adopt IPv6, which is the latest version of Internet Protocol. IPv6 uses 128-bit IP addresses and offers 2¹²⁸ unique IP addresses. Therefore, it expands IPv4 and provides new features of end to end connections as well as new services. In this paper, the various challenges with respect to providing connectivity, security, mobility, etc., have been discussed and how IPv6 helps in meeting those challenges.

• Journal of Korea Society of Digital Industry and Information Management
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• v.5 no.4
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• pp.231-247
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• 2009

With the growth of e-commerce banks make the best use of internet banking which can provide all sorts of financial services in cyber space and satisfy customers beyond traditional banking services which are cash reserve and loan based on retail. For survival of internet banking high quality of service should be provided to customers. For this, the attributes of service quality in internet banking should be identified first. The studies on scale of service quality in internet banking have been divided into two ways. While traditional way has focused on SERVQUAL, several researchers have developed scale of e-service quality. However, the dimension of e-service quality is applied from the traditional dimension of service quality. In this paper five dimensions of tangibles, reliability, responsiveness, assurance, and empathy based on SERVQUAL are used as scale of service quality in internet banking through reviewing previous studies. In addition, because service value is correlated to service quality, the dimensions of service quality can affect e-service value. The positive relationship among e-service value, customer satisfaction, and customer loyalty in online or offline service has been identified by previous studies. The purpose of this study is to identify the relationship among service quality, e-service value, customer satisfaction, and customer loyalty in internet banking. SPSS 12.0 is used to test validity and reliability of questionnaire items and correlation of variables and AMOS 4.0 is used to test the hypotheses. The results of this study show that the responsiveness, assurance, and empathy factors of service quality have a positive effect on service value and that the tangible and assurance factors have a positive effect on customer satisfaction. It also shows that e-service value affects positively customer satisfaction and loyalty. Customer satisfaction affects positively customer loyalty. Therefore, to enhance customer satisfaction and loyalty, service quality and value of internet banking should be improved through reinforcing customers' trust in internet service quality.

• The Journal of the Korea Contents Association
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• v.19 no.3
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• pp.357-364
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• 2019

The purpose of this study was to investigate the relationship between Internet addiction and oral health behavior among university students. The results, internet addiction was found in gender and smoking, oral health behaviors were classified according grade and smoking, differences in internet addiction were found in gender and smoking, there were statistically significant differences. And in common, high was first grades, non-health related major, smokers and drinkers, male students living at home. Oral health behaviors were found to be "lying on one side when sleeping" the highest, indicating that frequent use of the Internet occurred before sleep and thus negative oral health behaviors. In addition, there was a statistically significant correlation between college students 'oral health behavior and Internet addiction. Also, university students' internet addiction was found to be an oral health behavior. As a result of the above research, it is necessary to educate and guide appropriate internet use considering the influence on university students academic performance, and to develop oral health education program to recognize the problem of internet use regulation and the oral health behavior of university students themselves.

• The Journal of Korean Society for School & Community Health Education
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• v.16 no.1
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• pp.39-50
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• 2015

Objectives: A large number of teenagers are addicted to Internet games. The purpose of this study is to analyze the influence of leisure and family factors affecting internet game addiction among middle school boys. Methods: The data was used from 'Survey on the Online Game and Family Leisure Activities of Youth and Children in 2009' conducted by Korea Youth Policy Institute. Data were obtained from 1,681 middle school boys and analyzed by using the SPSS(version 20) program. Factors affecting game addiction were analyzed by ANOVA, Multiple Regression Analysis. Results: The results of this study revealed that the following variables have significant effects on game addition among middle school boys; psychology disorder about leisure, preference and participation disorder about leisure, father-child open communication, mother-child problem communication. Conclusions: Based on these results, we suggested leisure facility and programs to participate leisure life and activate communication with parents. Finally, limitations of this study and suggestions for future research were discussed.

• KSCI Review
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• v.14 no.1
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• pp.273-285
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• 2006

This study compares choice of contents genre between mobile VOD service users and landline internet VOD service users. Overall, males showed a higher rate of VOD usage than females and a variety of contents were used for entertainment, programs and mood alteration. In addition, a higher frequency of VOD usage showed a higher rate of VOD usage and also resulted in higher level of satisfaction. Also, the quality of landline internet VOD service showed to be higher than mobile VOD service. This suggests that programs for mobile VOD needs to be developed as well as a more open and simple rate system. In addition, subjects of this study showed to use VOD services mainly for entertainment purposes, suggesting that a variety of programs need to be developed in order to higher the level of satisfaction of its users.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.3 no.4
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• pp.376-384
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• 2009

In this article, we demonstrate that the asymmetric key-based architecture for securing wireless sensor networks recently introduced by Haque et al. is insecure under impersonation attack, since it does not provide authentication semantics. In addition, we show that, for the scheme to work correctly, the resulting key distribution construction should be symmetric and group-wise.

• Proceedings of the IEEK Conference
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• 1998.10a
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• pp.7-10
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• 1998

In implementing real time video on demand(VOD), the increase of user on internet causes a network traffic congestion. In this paper, we programmed a CGI able to login in VOD home for limiting the number of user in solving the problem, and also applied and adaptive multimedia synchronization technique for controlling video and audio data in a network. In addition, a real time multimedia player was designed and implemented in a personal computer operating at Window95/98/NT.

• Korean Journal of Computational Design and Engineering
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• v.10 no.2
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• pp.89-96
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• 2005

In this paper, Internet based ship technical information management system has been developed as a means to accumulate, manage, share and utilize various distributed applications and information used for ship design and building. The information managed in the system are data from whole life cycle including concept design, basic design, detailed design, construction, operation and maintenance. In addition, using the developed system, integrated system framework is also proposed to integrate applications and database in concurrent engineering environment.