• Proceedings of the Korean Information Science Society Conference
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• 2004.10a
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• pp.328-330
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• 2004

인터넷 환경에서 디지털 콘텐츠의 수요는 폭발적으로 증가하고 있으나 복제의 용이성으로 인해 콘텐츠의 불법 유통이 큰 사회적 이슈로 논의되고 있다. 따라서 저작권 보호 수단 중 가장 많이 쓰이는 DRM 기술이 필요하다. 본 논문은 디지털 응원(MP3)의 불법 복제를 방지하고 저작권 보호를 위해 DRM 시스템을 적용한 전자상거래 시스템을 설계하였다. 128비트 대칭키 암호화 기법인 SEED를 사용하여 디지털 콘텐츠를 암호화하고 사용자가 오프라인에서 디지털 콘텐츠 재생할 때 다운로드 방식과 스트리밍 방식의 중간 단계인 하이브리드 방식으로 재생하여 불법 복제로부터 음원을 보호할 수 있다 XrML 명세언어 사용으로 사용권한을 정의하고 재인증 기법으로 사용자 시스템 변경시 사용자의 권한을 보존해 준다

• Proceedings of the Korea Information Processing Society Conference
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• 2011.11a
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• pp.765-767
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• 2011

IT 와 비즈니스가 융합화 되고 정보가 디지털화 됨에 따라 그에 대한 저장매체도 점점 더 다양해지고 있다. 그 중 이동성이 편리하고 휴대하기 간편한 스마트폰을 활용하여 개인 정보를 주고 받고 이를 이용한 비즈니스가 현재 활발히 진행되고 있다. 이러한 소셜 네트워크 서비스 이용이 급격히 증가함에 따라 개인 정보 보안에 대한 중요성은 점점 더 강조 되고 있는 실정이다. 본 연구에서 제안하는 디지털 포렌식 분석 방법을 이용하면 스마트폰에서 지원하는 서비스 형태에 따라 텍스트, 이미지, 동영상 등의 개인 정보를 수집 및 분석이 가능하다. 또한 디지털 포렌식의 관점에 따라 스마트폰 에서 사용되고 있는 애플리케이션의 로그 정보를 수집 및 분석함으로써 스마트폰의 저장 장치에 남겨진 기록들을 훼손 없이 그대로 보존시키고 디지털 증거 자료로 활용이 가능해 사이버 범죄에 대한 신속한 해결이 가능하다.

• The Korean Journal of Archival Studies
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• no.32
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• pp.177-217
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• 2012

The National Archives of Korea(NAK) has a mission to ingest large-scaled digital records and information from a number of different government agencies annually from 2015. There are important issues related to the digital records and information transfer between NAK and agencies, and one of them is how to configure deployment of digital repositories for the archives management systems. The purpose of this paper is to offer the way to design it by examining the checkpoints through the whole life cycle of digital records and information in the archives management systems and calculating the amount of ingested digital records and information to the systems in 2015 and deploying the digital repositories configured according to the amount the records and information. Firstly, this paper suggests that the archives management systems in NAK should be considered and examined into at least three different parts called Ingest tier, Preservation tier and Access tier in aspects to the characteristics of the flow and process of the digital records and information. Secondly, as a results of the calculation the amount of the digital records and information ingested to the archives management systems in 2015 is sum up to around 2.5 Tera bytes. This research draws several requirements related to the large-scaled data and bulk operations which should be satisfied by the database or database management system implemented on to the archives management systems. Thirdly, this paper configures digital repositories deployment according to the characteristics of the three tiers respectively. This research triggers discussion in depth and gives specific clues about how to design the digital repositories in the archives management systems for preparing the year of 2015.

• Journal of Korean Society of Archives and Records Management
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• v.17 no.2
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• pp.189-205
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• 2017

Since the legislation of the act for public records, there has been a remarkable growth in records management in Korea. Recently, how to efficiently handle digital records has become an urgent issue in Korea. However, the appraisal process for (selection) archives seems inappropriate. This study reviewed the problems of each archiving process for records created by police departments and prosecutors' offices. Based on the results of the review, I proposed an improvement plan for the selective and appraisal acquisition of records.

• Journal of Digital Contents Society
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• v.19 no.6
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• pp.1219-1224
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• 2018

Nowaday, smart mobile devices on Internet of Things are required to process and deliver greate amount of data in real-time. Therefore, heterogeneous mult-core architecture such the big.LITTLE core architecture, which shows high energy conservation while guaranteeing high performance, are widely employed on up to date smart mobile devices. The LITTLE cores should be highly utilized to gain higher energy conservation because LITTLE cores have much higher energy efficiency than big cores. In this paper, we propose a core selection algorithm, which tries to firstly assign a real-time task on a LITTLE core rather a big core while the task can be finished within its own deadline. We also perform simulation as performance evaluation to show that our proposed algorithm shows higher energy conservation while guaranteeing the required performance.

• The Korean Journal of Archival Studies
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• no.27
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• pp.209-238
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• 2011

Ecomuseum which appeared in France in 1968 and widely diffused over the world, is a new type of museum. The purpose of this museum is not to simply possess and exhibit the existing relics, but to discover the locational senses of a territory by in-situ conserving and interpreting its entire natural and cultural heritages, and to plan the participation of its population and the development of its local community. The significance of this museum can be found in the recovery of disappearing collective memories of a territory, the restoration of the cultural identity of its population and the revitalization of a underdeveloped area. As the majority of these museums are fragmented or open air museums, an 'web ecomuseum' which makes the remote offering of informations about whole dispersed heritages and their holistic interpretation possible by digitalizing, recording, conserving, interpreting and utilizing related heritages, is necessary. This paper considers the possibility of web ecomuseum and its constitution contents and methods through the case of Mountain Mudeung area. Especially, in relation to the latter, this paper suggests a plan which consists of selection of own local themes, construction of digital archives, design of web expositions and production of electronic cultural maps.

• The Korean Journal of Archival Studies
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• no.38
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• pp.265-309
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• 2013

In response to the current electronic record environment, storing electronic records for necessary long terms have been the topic of the times. Especially, the method to preserving original form such as original functional property and bit stream becomes the key to long term preservation of electronic records. Until now in Korea migration methods were chosen as long term preservation strategy for public records, but the limitations were that the functionality and the original bit stream could not be maintained. Among the strategies for long term preservation of electronic records, emulation has significant strengths in that it can replicate the original form of electronic records without changes in the bit stream, and that unlike migration it can establish a single preservation strategy without needing to apply individual strategies according to type of electronic record. Especially because it can replicate the functional components that cannot be implemented in the current long term preservation format, there is a need to study the application method based on the studies of electronic record types currently used by public institutions. This study, to explore the methods for applying emulation as a strategy for the long term preservation of electronic records, reviews the latest study cases from the west about emulation as base study, and tries to analyze the specific cases about the feasibility, target, and methods of emulation. Through this the study tries to explore the implications for domestic application as well as the strengths and weaknesses of emulation. To do this, the study analyses the concept, strengths and weaknesses of emulation as a long term preservation strategy, the analyses the latest best cases of emulation in the west; CAMiLEON, KB, Planets, and KEEP project. Based on these analysis this study tries to suggest implications and application methods for electronic records in the future in Korea.

• Proceedings of the Korean Society for Information Management Conference
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• 1999.08a
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• pp.89-94
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• 1999

디지털 문헌이 증가하고 디지털 도서관이 개발되면서 인터넷 정보자원을 도서관장서의 일환으로 개발, 보존, 이용시키는 문제가 논의되기 시작되었다. 본 연구는 네트워크로 연결되는 인터넷 자원을 도서관의 가상적 장서로 수용하기 위하여 인터넷을 통해 제공되는 정보자원과. 이의 접근과 관련된 문제들을 정의하였다. 그리고 인쇄자료와 비교하여 인터넷상에 유통되는 자원의 형식 등을 비교 분석하여 자료의 신뢰성을 평가하는 요소를 개발하고, 전통적인 장서개발 요소와 비교하여 인터넷 정보자원을 선택하는데 필요한 평가요소를 설정하였다.

• Proceedings of the KIEE Conference
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• 2000.07d
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• pp.2927-2929
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• 2000

정보보호를 위해 비연성 디지털 워터마킹 방법으로 웨이브릿 변환을 많이 사용하고 있다. 본 연구에서는 여러 웨이브릿 변환인 드비시(Daubechies)변환, Coiflets 변환, Symlets 변환과 biorthogonal 변환등을 이용하여 비연성 디지털 워터마킹기법을 구성하고 각 변환의 특징과 성능비교를 한다. 공격의 형태는 dct변환 압축에 의한 영향에 의한 워터마킹의 보존여부에 관하여 고찰한다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 1999.06b
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• pp.41-44
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• 1999

최근, 방송기술의 발전이 날로 그 속도가 빨라지고 있다. 기존의 아날로그 방송에서 요즘은 디지털 방송으로 전환되는 것이 그 예이다. 방송의 디지털화는 영상 및 음성의 질을 높이고 방송 자료의 영구보존 및 검색에 뛰어난 장점을 가지고 있다. 반면 하드웨어의 복잡도가 높아지고 그 응용 소프트웨어가 부족한 형편이다. 본 논문에서는 MPEG-2로 압축된 영상 데이터에서 원영상 레벨의 복원과 재압축 없이 압축 비트열내 특징정보를 추출 및 간단하게 조작하여 간단하게 움직이는 오브젝트에 모자이크 효과를 적용하였다.