• Proceedings of the IEEK Conference
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• 2000.09a
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• pp.519-522
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• 2000

Digital watermarking has been proposed as a solution to the problem of copyright protection of the multimedia documents. In this paper a new watermarking method for digital images operating in the frequency domain is proposed. In our approach, DCT coefficients of the watermark are added to the low frequency region of the host image, and extract it using the Wiener Filter. Due to the characteristic of the wiener filtering, the watermark is robust to various image processing techniques. Experimental results show that it is possible to reliably extract the watermark without degrading image quality.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2004.05b
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• pp.144-148
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• 2004

Beyond the digital world from the analog age, the contents are very easily copied under the illegal conditions and these are rapidly distributed by the information super highway. The increase of illegal usage and conflict in digital content market would diminish motivation of creators for their work, furthermore break down digital content market on cyberspace. Watermarking technology support to the legal users by the protection technique based on the digital content copyright protection method(DRM). Most of previous digital watermarking have embeded to the content. In this paper, we researched the standardization of digital rights management and developed more efficient watermark embedding method.

• Journal of the Korea Society of Computer and Information
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• v.22 no.4
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• pp.51-58
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• 2017

Research on the Development of EPUB SCP(Secure Content Protection) Technical Specification and International Standardization has been carried out as a R&D project granted by the Korea Copyright Commission since 2014. The research aims to build a standard framework for the EPUB DRM(Digital Rights Management) based on the Readium LCP(Licensed Content Protection) and KS EPUB DRM specifications, to develop element technologies for the framework, and to standardize it as an IDPF(International Digital Publishing Forum) industrial standard. One of the essential features of the EPUB DRM developed though this study is to support the lending model of the digital library. This paper introduces LSD(License Status Document) specification which is a DRM license management protocol for the digital library lending process, and also represents a model which can automatically test the implemented entities of the LSD specification, test scenarios and test materials.

• 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 Korea Information Processing Society Conference
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• 2002.11a
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• pp.19-22
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• 2002

워터마킹(watermarking) 기술은 판매하거나 배포할 자료들 중, 특히 이미지, 오디오, 텍스트, 비디오 및 멀티미디어 데이터 등에 원래의 소유주를 표시할 수 있는 특정 데이터, 즉 워터마크를 넣어 소유주를 확인할 수 있게 하는 저작권 보호(copyright protection)기법으로 근래에 들어 그 필요성이 크게 대두되고 있는 기술이다. 본 논문에서는 wave format 파일을 읽어들여 음향에 효과를 주는 응용프로그램의 불법사용을 막는 데에 대한 저작권 보호를 연구 기술하였다. 원본 없이 추출 가능한 디지털 워터마킹 기법[1]을 음악파일에 삽입하고 응용프로그램이 그것을 추출하여 편집저장할 여부를 결정하도록 하는 방법에 주요 관점을 두고 실험 및 구현을 하였다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2006.05a
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• pp.573-576
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• 2006

Recently, the standard work of the copyright of the Digital content is not completed. And the content providers are developing self's copyright protecting technique. here is some problem such as the confusion existed in the copyright protecting and management system. The reason is that the company using different technique when developing the Digital Contents. Now, there is a standard working leaded by the MPEG. It's called MPEG-21 Multimedia framework and the REL is parted of the Intellectual Property Management and Protection included the framework. And the REL's standard working is completed. The Intellectual Property Management and Protection system contain license server, tool server, metadate server and consume server. In this paper, In order to management and protect the Digital Content copyright, We applying the REL, One of the contents of the MPEG-21 framework to design and implementation the License Server manage the settlement and the consumption information and the Tool Server manage and transport the Tools used from Digital Contents formation to the Digital Contents consumption.

• Journal of the Korean Society for information Management
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• v.40 no.3
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• pp.119-142
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• 2023

Copyright is a legal criterion for determining the scope and method of digital library service. Works with expired protection periods correspond to the public domain and can be freely used by anyone. For this reason, it is a priority consideration in digital library construction and services. The purpose of this study is to examine how actively libraries are using expired protected works for digital library services. To this end, the relevant provisions of the Copyright Act applied to the construction and service of digital libraries were first summarized, and the meaning of the copyright protection period was theoretically examined. The current status of online services for expired works by the National Library of Korea was examined, focusing on the works of three Japanese colonial era writers, Kim Yoo-jung, Lee Hyo-seok, and Chae Man-sik, to check the specific service status of expired works. It reveals that the National Library of Korea is not fully utilizing the scope of the law, and that this situation is linked to the rights of other authors included in the book. Based on these results, it suggests that there is a need to change the service unit to focus on copyrighted works and to use authority records to systematize the management of authors' death years.

• Review of KIISC
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• v.7 no.4
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• pp.59-72
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• 1997

본 고에서는 정지 및 동화상, 음성등과 같은 멀티미디어 데이터의 저작권 보호를 위하여 사용되는 워터마크 기술에 대하여 분석함으로써 기존의 워터마크를 특수 코드의 삽입 기술로 응용함으로써 영상 인증 분야 연구에 도움이 되고자 하였다.

• Proceedings of the Korea Contents Association Conference
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• 2005.11a
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• pp.480-484
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• 2005

In this paper, the multiwatermarking method to make it possible to the authentication, modification detection and copyright protection of the digital image was proposed. After the original image is transformed by the DWT(Discrete Wavelet Transform), the encrypted watermark information is embedded into the LSB(Least Significant Bit) of LL band on the low frequence domain for authenticating and detecting modified position in the image. And watermark information is embedded by exchanging the wavelet coefficient for the copyright protection. Thereby, we can authenticate the modification and detect the modified location by extracting the values of LSB on the low frequence domain. And we can perceive the copyright information of original image by extracting the embedded watermark on the high frequence domain.

• Journal of the Institute of Convergence Signal Processing
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• v.15 no.1
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• pp.1-8
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• 2014

Digital watermarking techniques are attracting attention as a proper solution to protect copyright for multimedia data. This paper proposes a new audio watermarking method based on Discrete Cosine Transformation (DCT) and Discrete Wavelet Transformation (DWT) for copyright protection. In our proposed watermarking method, the original audio is transformed into DCT domain and divided into two parts. Synchronization code is applied on the signal in first part and 2 levels DWT domain is applied on the signal in second part. The absolute value of DWT coefficient is divided into arbitrary number of segments and calculates the energy of each segment and middle peak. Watermarks are then embedded into each middle peak. Watermarks are extracted by performing the inverse operation of watermark embedding process. Experimental results show that the hidden watermark data is robust to re-sampling, low-pass filtering, re-quantization, MP3 compression, cropping, echo addition, delay, and pitch shifting, amplitude change. Performance analysis of the proposed scheme shows low error probability rates.