• Proceedings of the Korea Information Processing Society Conference
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• 2001.10b
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• pp.965-968
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• 2001

최근 초고속 통신망을 이용한 인터넷의 대중화와 더불어 인터넷을 기반으로 하는 전자상거래가 활발해지고 있다. 특히 인터넷을 통한 MP3 데이터 등의 멀티미디어 컨텐츠의 유통은 많은 연구의 대상이 되고 있다. 하지만 기존의 AOD(Audio On Demand) 시스템들은 실질적인 불법복제방지와 저작권 보호에 미흡한 단점이 있다. 따라서 본 논문에서는 에이전트를 이용하여 실질적인 불법복제방지와 저작권을 보호하는 AOD 시스템을 제안한다. 제안된 기법은 사용자의 시스템에 에이전트를 설치하여 정식 사용자를 인증하고 해당 사용자키로 암호화되어 전송된 MP3 데이터를 재생함으로써 전송 도중 제 3 자로부터의 공격에 대응할 수 있고, 정당한 사용자 외에는 MP3 데이터를 사용하지 못하도록 함으로써 사용자와 판매자의 권리를 보장한다.

• Proceedings of the Korea Multimedia Society Conference
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• 2002.05d
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• pp.947-950
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• 2002

디지털 컨텐츠의 지적 재산권 보호를 위한 디지털 워터마킹 기술 및 핑거프린팅의 연구가 활발히 진행되고 있다. DRM(Digital Rights Management)는 디지털 컨텐츠 지적 재산권 보호뿐만 아니라 컨텐츠에 대한 출판, 유통 및 사용에 필요한 관리와 보호체계이다. 본 논문에서는 컨텐츠 유통과정에서 발생할 수 있는 불법 복사와 같은 불법 행동에 대해 컨텐츠를 안전하게 보호하며 사용자에게 편의성을 제공 할 수 있는 프로토콜을 제시할 것이며 또한 지불의 효율적 사용을 위해 분할성 기능과 함께 화폐 추적과 사용자 추적 기능을 Hidden Agent에 포함하여 제안한다. 이 Hidden Agent는 특별한 설치가 필요 없이 컨텐츠 내에 내포되어 있어 컨텐츠에 대한 지불, 불법복사 및 불법사용에 대해 체크함으로써 불법복사의 사용을 차단할 수 있도록 한다. 또한 사용자들에게 숨겨져 있기 때문에 워터마킹의 역할 또한 대신할 수 있다. 따라서 본 논문에서는 유통과정에서 가장 빈번하게 나타날 수 있는 지불과 불법 복사에 대하여 Hidden Agent를 이용하여 해결하였다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.14 no.9
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• pp.2049-2056
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• 2010

The illegal copy of computer software have been one of the most serious threats in information society. But a number of protection schemes to solve it have proposed, there are a lot of difficulties for prevention from illegally distributing software through emerging Internet environments. In this paper, we propose a software watermarking scheme for Java programs which it have been popular on the Internet. The proposed scheme can be efficiently implemented and provide a robust software watermark for the protection of the copyright of Java programs.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2004.11a
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• pp.285-288
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• 2004

High-quality digital broadcasting contents are susceptible to illegal copy and unauthorized redistribution, which makes broadcasters difficult to protect valuable media assets. So, broadcasters and content providers need the technology for copyright protection of professional digital content. Digital watermarking technology is one of the most actively developed solutions for the copyright protection. This paper suggests the requirements of watermarking technology in DTV(Digital TV) environment for copyright protection and shows the developed real-time watermark embedding/detecting system for HD(High Definition)/SD(Standard Definition) video and experimental results of the system against watermark attack tests. Our watermarking system meets the watermarking requirements of invisibility, robustness and security of DTV environment.

• Journal of Broadcast Engineering
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• v.10 no.2
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• pp.131-138
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• 2005

High-quality digital broadcasting contents are susceptible to illegal copy and unauthorized redistribution, which makes broadcasters difficult to protect valuable media assets. So, broadcasters and content providers need the technology for copyright protection of professional digital content. Digital watermarking technology is one of the most actively developed solutions for the copyright protection. This paper suggests the requirements of watermarking technology in DTV(Digital TV) environment for copyright protection and shows the developed real-time watermark embedding/detecting system for HD(High Definition)/SD(Standard Definition) video and experimental results of the system against watermark attack tests. Our watermarking system meets the watermarking requirements of invisibility, robustness and security of DTV environment.

• Journal of Digital Contents Society
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• v.7 no.3
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• pp.199-205
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• 2006

Due to easy access to information in our digital society, there are many cases of illegal counterfeiting and usage of personal information. Producing information with investment and effort is important indeed, but managing and protecting information is becoming a furthermore important issue. This is to promote a new detecting theory and solution for cases of intellectual property violations and plagiarizing digital contents.

• Proceedings of the KIEE Conference
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• 1998.11b
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• pp.606-608
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• 1998

Digital watermarking is the technique which embeds the invisible signal into multimedia data such as audio, video, images, for copyright protection, including owner identification and copy control information. In this paper, a new watermark detection algorithm by local masking cross covariance between watermarked signal and pseudo noise signal is proposed. The proposed algorithm enhances the detection probability for embedding information. Since reducing detection errors for the weak embedding signals, the algorithm improves the image quality and robusts against illegal attack to delete the embedding information and data compression applications such as JPEG and MPEGs.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• v.9 no.1
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• pp.910-913
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• 2005

The use of digital imaging technique and digital contents based on internet has grown rapidly for last several years, and the needs of digital image protection become more important. For the purpose of copyright protection on digital image, the verification of authentication techniques like content authentication, ownership authentication, illegal copy and etc are needed. Digital watermarking, the invisible encryption technique to insert digital watermark into image, the sophisticated perceptual information should be used for providing transparency and robustness of images on watermarking process. In this paper, we implement the algorithm for preventing forged attack, ownership protection and authentication by transforming the wavelet algorithms in frequency domain in terms of human visual system.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2006.05a
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• pp.717-720
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• 2006

The use of digital imaging technique and digital contents based on internet has grown rapidly for last several years, and the needs of digital image protection become more important. for the purpose of copyright protection on digital image, the verification of authentication techniques like content authentication, ownership authentication, illegal copy and etc are needed. Digital watermarking, the invisible encryption technique to insert digital watermark into image, the sophisticated perceptual information should be used for providing transparency and robustness of images on watermarking process. In this paper, we implement the algorithm for preventing forged attack, ownership protection and authentication by transforming the wavelet algorithms in frequency domain in terms of human visual system.

• Proceedings of the Korea Information Processing Society Conference
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• 2000.04a
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• pp.620-623
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• 2000

최근 초고속 통신망을 이용한 인터넷의 대중화와 더불어 인터넷을 기반으로 하는 전자 상거래가 활발해지고 있다. 특히 인터넷을 통한 소프트웨어 형태의 디지털 상품을 판매하는 전자 소프트웨어 분배(Electronic Software Distribution)는 전자 상거래 매출에 있어서 빠른 성장률과 높은 거래량을 기록할 것으로 평가되고 있다[1]. 본 논문은 이러한 객체지향 기술중 통합된 모델링 방법인 UML을 이용하여 디지털 상품 불법 복제 방지를 위한 ESD 서버를 설계하였다. 불법 복제 방지를 위한 ESD 서버는 사용자에게 분배하는 사용권을 사용자 공개키를 이용하여 암호 알고리즘을 적용하여 분배한다. 따라서 소프트웨어형태의 디지털 상품의 불법 복제를 차단하는 효과가 있다.