• Journal of Korea Multimedia Society
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• v.2 no.4
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• pp.438-450
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• 1999

In this paper, a new watermaking method embedding digital watermarks in the compressed video for the copy protection of multimedia data. The proposed method segments objects and embeds independent watermarks in each objects by spread spectrum method in the bitstream domain which is compressed by DCT and motion compensated coding method like MPEG-2. And, the proposed method not only embeds watermarks but show the robustness to the attacks like average operation or statistical analysis.

• Proceedings of the Korean Society for Information Management Conference
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• 2012.08a
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• pp.29-32
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• 2012

정보통신기술의 발달로 학술정보가 디지털화되고 온라인으로 유통이 이뤄지면서 영리 출판사를 통한 신속하고 광범위한 배포가 활발해졌다. 그러나 이 과정에서 불명확한 저작권 귀속 규정으로 인한 저작권 침해 문제가 부각되었다. 이 연구에서는 국내 학술지의 저작권 귀속 규정과 저작권 양도 동의서의 현황에 대해 살펴보고, 학술정보 유통 채널의 유형 간 원문 제공 빈도를 비교하고 분석하였다. 본 고는 분석 결과를 통해 현행 저작권 귀속 규정의 문제점을 도출하고, 향후 진행될 저작권 동의서 표준안 개발의 연구 방향을 설정하는 것으로 제한한다.

• Journal of Korea Multimedia Society
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• v.10 no.6
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• pp.737-744
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• 2007

This paper proposes the blind watermarking algorithm for digital video based on magnitude modulus subband in wavelet transform domain. After transforming each of frames into wavelet domain, the proposed algorithm divides LH, HL, and HH subbands of 2-level into $3{\times}3$ blocks and calculates average magnitude modulus of all blocks. Then the watermark bit is embedded into a target magnitude modulus comparing with an average magnitude modulus within a block. Experimental results were confirmed that the proposed algorithm has the good robustness against MPEG and frame attacks than the conventional algorithm.

• Journal of KIISE:Information Networking
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• v.36 no.6
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• pp.536-544
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• 2009

This paper proposed a novel vector digital watermarking method to protect copyright. The proposed method embeds watermarks after finding the closest pair of points and calculating the distance of the points. We tested the robustness of the method through several attacks on watermarked data. The experimental results show that the proposed method has more robustness than previous methods. And the new method doesn't change the topology of the vector data. Therefore, this method can be 'the vector digital watermarking for GIS.

• Proceedings of the Korea Contents Association Conference
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• 2003.05a
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• pp.209-213
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• 2003

We have several kinds of DRM(Digital Rights Management) solutions which protect and control a content based on the cryptography. The current technology of DRM focuses on the content management in the purchaser. It doesn't consider the content management in the other principles like creator, provider, and distributor and doesn't provide the efficient environments of a content distribution. In this paper, we propose a digital content distribution system which processes a content and metadata with electronic copyright management.

• Proceedings of the Korea Contents Association Conference
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• 2003.05a
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• pp.218-222
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• 2003

Internet has made it easer to get information, also distribute and exchange it among people. It brings about issues regarding intelligent property and copyright threats. h a multimedia commerce such as video-on-demand, Internet broadcasting services, only users who have rights for use of these services should be able to access and watch those video or movies In this paper, we propose DRM(Digital Right Management) system for P4 -based streaming and MP4 encryption algorithm for proposed DRM system.

• The Journal of the Korea Contents Association
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• v.1 no.1
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• pp.93-99
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• 2001

The widespread use of the Internet brings about the issue regarding intellectual property and copyright. This paper describes DRM (Digital Rights Management) technologies and their related issues. Current approaches on DRM architecture are examined first. Based on the review, we discuss some security issues that would be essential to design security mood and architecture appropriate for DRM. Having these security issues in mind, we propose a new approach on DRM security architecture, based on our trust model.

• International Journal of Contents
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• v.5 no.2
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• pp.26-31
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• 2009

This paper describes a new image watermarking scheme invariant to rotation, scaling and translation (RST) attacks. For obtaining the invariance properties we propose to present an image of watermark by wedges and rings to convert its rotation to shift and then utilize the shift invariance property of the Direct Fourier Transform (DFT). But in contrast to conversional schemes based on the Fourier-Mellin transform (FMT), we do not use a log-polar mapping (LPM). As a result, our scheme preserves high quality of original image since it is not underwent to LPM For withstanding against JPEG compression, noise addition and low-pass (LP) filtering attacks a low frequency watermark is embedded into middle frequencies of the original image. Experiments with various attacks show the robustness of the proposed scheme.

• Journal of information and communication convergence engineering
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• v.9 no.2
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• pp.212-216
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• 2011

Digital watermarking has gained importance in recent years in copyright protection and multimedia. This paper proposes a secure and novel watermarking system based on complemented Maximum Length Cellular Automata (MLCA) and Two-Dimension Cellular Automata Transform (2D CAT). In this watermarking scheme, the original watermark is first encrypted by complemented MLCA with the private keys, and then the encrypted watermark is embedded into the CAT domain of the cover image, at last use the inverse CAT for the transformed image, the watermarked image is obtained. Experiment results show that this new method is more secure and provides robust performance against watermarking attacks.

• The KIPS Transactions:PartA
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• v.10A no.4
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• pp.405-410
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• 2003

In this paper, we have designed and implemented an E-Book Exchange System which is based on the Open E-Book Exchange protocol of Open E-book forum. The ebook is described digital contents composed of variable media and should require secured ebook server for copyright guarantee. Also, contents manufactures, circulation company, and user must access the ebook contents easily. So, Linux-based ebook server and reader can satisfy this requirements. Therefore, this research has developed Linux-based ebook server and reader which is cost-effective.