• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.1
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• pp.100-109
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• 2011

The study concluded that in order to achieve a single sign-on through the federation ID management method must be used among many other methods so to establish a combined approval service that gives access to education related information provided by the 16 city and provincial offices of education and the KERIS(Korea Education & Research Information Service). The federation ID management method allows the usage of authentication policy and enables transfer of ID information to other institutions through standardized processing. Therefore by establishing single sign-on through the federation ID management method allows individual city and provincial office of education to maintain the already existing approval services while combining user identification database.

• The Journal of the Korea Contents Association
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• v.5 no.5
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• pp.78-84
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• 2005

Various kinds of data broadcasting services can be offered using a return-channel in digital broadcasting TV compared to analog services. In these data broadcasting environments, several data(associated with TV broadcasting programs, or not) are provided to the TV audiences except for audio/video broadcasting data. In this paper, a structure of data manager for data/object carousel, based on data broadcasting protocols, was proposed for data broadcasting services using a return-channel, and were supported to the production technologies of DTV contents. These contents application techniques for DTV will be implemented with this data manager in MPEG2-TS data broadcasts using PID(Packet ID).

• Journal of the Korea Society of Computer and Information
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• v.11 no.2 s.40
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• pp.239-251
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• 2006

Zheng's signcryption scheme is a new encryptical scheme of which can save more expense than those of the current signature encryption by using digital signature and symmetric key encryption logically. The current signcryption schemes have a problem that is to be exposed the secret key of the receiver in the case of checking repudiation of origin by the third party. To solve this problem, a solution suggested in this paper is to use multi-purpose ID-based signcryption scheme with anonymity and unlinkability. This solution is safe and more efficient than current signcryption schemes because the suggested scheme keeps the security of the random oracle model as using Weil-pairing in encryption. and follows a formal proof of semantic security of the decisional Diffie-Hellman problem.

• Human Ecology Research
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• v.53 no.6
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• pp.641-654
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• 2015

This study identifies and tracks changes gender differences in adolescent users' problematic online behavior. This study used Korea Youth Panel Survey (KYPS), which has tracked respondents over 7 years, with self-control theory and social learning theory applied as a theoretical framework. The model included individual-level variables such as self-control and respondent's experience of problematic behavior (offline), as well as socialization variables such as the number close friends who engaged in problematic offline behavior, parent-child relationships, and parental monitoring. Dependent variables included problematic online behavior, unauthorized ID use (ID theft) and cyberbullying (cursing/insulting someone in a chat room or on a bulletin board). Control variables consisted of academic performance, time spent on a computer, monthly household income, and father's educational attainment. Random and fixed effects models were performed by gender. Results supported self-control theory even for the within-level analysis (fixed effects models) regardless of gender, while social learning theory was partially supported. Only peer effects were found significant (except for unauthorized ID use) among girls. Year dummy variables showed significant negative associations; however, academic performance and time spent using computers were significant in some models. Father's educational attainment and monthly household income were found insignificant, even in the random effects models. We also discuss implications and suggestions for future research and policy makers.

• The Journal of the Korea institute of electronic communication sciences
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• v.7 no.5
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• pp.1061-1066
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• 2012

A digital memory has been widely used as a device for storing information due to its reliable, fast and relatively simple control circuit. However, the storage of the digital memory will be limited by the inablility to make smaller linewidths. One way to dramatically increase the storeage capability of the memory is to change the type of stored data from digital to analog. The analog memory fabricated in a standard single poly 0.6um CMOS process has been developed. Single cell and adjacent circuit block for programming have been designed and characterized. Applications include low-density non-volatile memory, control of redundancy in SRAM and DRAM memories, ID or security code registers, and image and sound memory.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.16 no.1
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• pp.87-96
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• 2006

In this paper, we examine general digital evidence collection process which is according to RFC3227 document[l], and establish specific steps for memory information collection. Besides, we include memory dump process to existing digital evidence collection process, and examine privacy information through dumping real user's memory and collecting pagefile which is part of virtual memory system. Especially, we discovered sensitive data which is like password and userID that exist in the half of pagefiles. Moreover, we suggest each analysis technique and computer forensic process for memory information and virtual memory.

• Journal of Broadcast Engineering
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• v.14 no.3
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• pp.311-321
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• 2009

In a single frequency network (SFN) for Advanced Television Systems Committee (ATSC) terrestrial digital television (DTV) system, the interference due to the use of same frequency among multiple transmitters or repeaters is inevitable for receivers. This problem can be solved by adjusting transmit power and time of each transmitter and repeater. To adjust SFNs, the ATSC recommended practice (RP) introduces a transmitter identification (TxID) signal which is embedded in a signal from each transmitter or repeater. This paper proposes an efficient method to estimate the individual reception power from each transmitter or repeater based on the channel profile of SFN and the total reception power. Moreover, field test results are provided to evaluate the performance of the proposed method.

• Journal of Korea Multimedia Society
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• v.15 no.1
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• pp.32-39
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• 2012

In this paper, the implementation of location based services (LBS) using S-DMB (satellite-digital multimedia broadcasting) system was proposed. In S-DMB System, the frequency of transmitted signal is about 2 GHz which has a characteristics of strong straightness but weak diffraction so that there are many shade areas such as indoors and underground spaces. Therefore the signal transmitted from the satellite should be retransmitted by the earth repeaters called as gap filler. Because each gap filler has its own identification value, the gap filler ID introduces the area in which the gap filler was installed. Generally, the 51st data symbols of S-DMB pilot signal transmitted from the satellite are padded by dummy value and gap filler ID is embedded in this pilot symbol by the gap filler when S-DMB signals are retransmitted by gap fillers. So using gap filler ID of S-DMB system, LBS such as region registration, distance and time to destination, alarm of local area information could be implemented. In the experiment to prove the performance of the proposed LBS system using the gap filler ID of the S-DMB system, the firmware of S-DMB chip composing of RF and baseband parts was lightly modified so that application processor was able to manipulate the gap filler ID and the its related regional information.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.11 no.4
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• pp.414-420
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• 2018

The digital convergence looking for new ways to engage visitors by superimposing virtual content on projection over the real world captured media contents. This paper propose the Light ID based interactive 3D immersive exhibition things view using HMD AR technology. This approach does not required to add any additional infrastructure to be built-in to enable service and uses the installed Lighting or displays devices in the exhibit area. In this approach, the Light ID can be used as a Location Identifier and communication medium to access the content unlike the QR Tag which supports provide the download information through web interface. This utilize the advantages of camera based optical wireless communication (OWC) to receive the media content on smart device to deliver immersive 3D content visualization using AR. The proposed exhibition method is emulated on GALAXY S8 smart phone and the visual performance is evaluated for Jeonju Hanok Village. The experimental results shows that the proposed method can give immersive 3D view for exhibit things in real-time.

• Journal of the Korean Geographical Society
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• v.49 no.2
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• pp.310-319
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• 2014

The purpose of this study was building a new method for map making with a toponym by connecting a toponym DB with a digital topographic map DB. First, the table of toponym history in the toponym DB was revised. Second, a table linking the toponym DB and the digital topographic map DB was added. To integrate the toponym DB and the digital topographic map DB, a loose-coupling method was suggested and the combination of legal Dong and a toponym could be used as ID for liking those two databases. Thus, the method presented in this study would be used for effective map making using a toponym. Through the improvement of a toponym DB, it is expected the active use of the toponym DB such as map making.