• Journal of the Korean Society for information Management
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• v.18 no.2
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• pp.31-56
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• 2001

The number of websites in Korea is increasing rapidly as demonstrated by more than 510,000websites registered under the ".kr" domain as of the end of December 2000. In order to effectively copewith the deluge of web information and maintain ready access to useful information on the web,utilization and management of web information through websites that have been evaluated and ratedfavorably is becoming increasingly important. As websites now increasingly provide industry-specificinformation, information managers are now finding it essential to meet their specific information needsthrough separation and ranking of useful information from the rest.However, evaluation of industry-specific information requires industry-specific expertise as well asgeneral website evaluation tools. This paper develops a website evaluation model and attempts to rankindustry-specific websites through case studies of previous website evaluation and consultation withexperts in specific industries. Based on the model developed, this paper selects 100 outstanding websitesin 10 areas of construction industry. The research also hypothesizes that, with appropriate modifications,the rating models used for the construction industry can also be applied to other industries for moreefficient information management.e efficient information management.

• Journal of KIISE
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• v.43 no.9
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• pp.983-997
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• 2016

Many available online product reviews for any given product makes it difficult for a consumer to locate the helpful reviews. The purpose of this study was to investigate automatic helpfulness evaluation of online product reviews according to review information types based on the target of information. The underlying assumption was that consumers find reviews containing specific information related to the product itself or the reliability of reviewers more helpful than peripheral information, such as shipping or customer service. Therefore, each sentence was categorized by given information types, which reduced the semantic space of review sentences. Subsequently, we extracted specific information from sentences by using a topic-based representation of the sentences and a clustering algorithm. Review ranking experiments indicated more effective results than other comparable approaches.

• Journal of Convergence Society for SMB
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• v.5 no.2
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• pp.1-6
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• 2015

Small and medium-sized companies lack countermeasures to secure the safety of a information system. In this circumstance, they have difficulties regarding the damage to their images and legal losses, when the information is leaked. This paper examines the information leakage of the system and hacking methods including APT attacks. Especially, APT attack, Advanced Persistent Threats, means that a hacker sneaks into a target and has a latency period of time and skims all the information related to the target, and acts in the backstage and neutralize the security services without leaving traces. Because he attacks the target covering up his traces not to reveal them, the victim remains unnoticed, which increases the damage. This study examines attack methods and the process of them and seeks a countermeasure.

• Journal of the Korea Convergence Society
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• v.8 no.6
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• pp.37-44
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• 2017

Mobile devices provide various services through payment and authentication by inputting important information such as passwords on the screen with the virtual keypads. In order to infer the password inputted by the user, the attacker captures the user's touch location information. The attacker is able to infer the password by using the location information or to obtain password information by peeping with Google Glass or Shoulder Surfing Attack. As existing secure keypads place the same letters in a set order except for few keys, considering handy input, they are vulnerable to attacks from Google Glass and Shoulder Surfing Attack. Secure keypads are able to improve security by rearranging various shapes and locations. In this paper, we propose secure keypads that generates 13 different shapes and sizes of Tetris and arranges keypads to be attached one another. Since the keypad arranges different shapes and sizes like the game, Tetris, for the virtual keypad to be different, it is difficult to infer the inputted password because of changes in size even though the attacker knows the touch location information.

• Journal of Industrial Convergence
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• v.17 no.1
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• pp.1-6
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• 2019

Various cryptographic technologies have been proposed from ancient times and are developing in various ways to ensure the confidentiality of information. Due to exponentially increasing computer power, the encryption key is gradually increasing for security. Technology are being developed; however, security is guaranteed only in a short period of time. With the advent of the 4th Industrial Revolution, encryption technology is required in various fields. Recently, encryption technology using homomorphic encryption has attracted attention. Security threats arise due to the exposure of keys and plain texts used in the decryption processing for the operation of encrypted information. The homomorphic encryption can compute the data of the cipher text and secure process the information without exposing the plain text. When using the homomorphic encryption in processing big data like stored personal information in various services, security threats can be avoided because there is no exposure to key usage and decrypted information.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.10 no.8
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• pp.1359-1365
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• 2006

Digital Koguryo is a virtual reality reconstruction of the Koguryo mural tumulus, Anak No. 3, designed for an interactive educational gaming and learning environment. Digital Koguryo aims at not only developing a digital reconstruction of cultural heritage but also helping young students learn the living style and the custom of Koguryo Kingdom while playing the game environment. This paper describes the digital restoration process of Koguryo mural paintings and 3D structure, as well as the construction of educational virtual environment designed to get more user's interests. It then discusses a few design issues learned from the development and the public demonstration. Finally, it will present the future research directions to improve the users' immersion.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2000.10a
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• pp.292-295
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• 2000

This paper presents effective Load Balancing Algorithm by exampling EvtProc Daemon controlling the Event handling among the W/S Daemon which manages and controls Digital Cross Connect Systems. In this paper, when a lot of event occur, charging process waits regular times instead of executing consecutive exec process. so, We can reduce overheads of fork and exec process. another method of reducing the overheads is it that waiting process handles consecutives events of Op Code. And We also presents effective and stable management scheme of event handling , for the generation of event handling Child process by charging the Load Balancing to the main child process

• The Journal of the Convergence on Culture Technology
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• v.3 no.3
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• pp.21-25
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• 2017

In this paper, we review relevant technologies of Mixed Reality(MR) and show important components of perspective that can overcome technical limitations of the current MR. An MR technology combines real and virtual objects in a real environment, and runs interactive in real time, and is regarded as an emerging technology in a large part of the future of Information Technology(IT). We've grouped the major obstacles limiting the wider use of MR technologies into three themes: technological limitations (i,e., tracking, rendering, authoring, and registration), user interface(UI) limitations(i.e., UI metaphor for MR interaction), and social acceptance issues.

• Journal of the Korea Society of Computer and Information
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• v.11 no.2 s.40
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• pp.231-238
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• 2006

As digital contents circulation environment goes on-line by fast development of the latest Internet, contents demand is growing rapidly. However, XrML hard to change dynamically and has controversial point that hard to reflect user's request maximum after create license and issues to user, in this paper study of active digital license administration model who can reflect user request dynamically and support reusability of license XrML eXrML model who design extension design and suggested. Expect that this presents efficient administration plan in administration study of license base as well as study for digital contents administration.

• Proceedings of the Korean Society of Computer Information Conference
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• 2010.07a
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• pp.311-314
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• 2010

예전부터 IT 기술을 이용한 장애인의 복지 증진을 위한 많은 연구들이 진행되고 있다. 최근에는 거리에 설치된 수많은 모바일 센서들을 활용하여 라이프 로그를 저장하고 네트워크를 통하여 서버에 전송함으로써 로그를 저장한 후, 이러한 라이프 로그를 분석함으로써 해당 사용자가 위험에 노출되어 있는 지를 판단 할 수 있게 되는 시스템이 많이 제안되고 있다. 특히 장애인의 경우 위험에 노출되기 쉬우며 매번 보조자들이 함께 다녀야 한다는 부담 때문에 외출을 두려워하는 경향이 있다. 따라서 이러한 부담감을 덜어주어야 심리적으로도 육체적으로도 더 나은 삶을 살아갈 수 있게 유도할 수 있을 것이다. 본 연구는 이러한 심리적 부담감을 덜어주기 위한 방법으로 장애인의 라이프 로그를 기록하고 분석할 수 있는 시스템을 제안한다.