• Title/Summary/Keyword: Digital Copyright Protection

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A Study on Invisibility Improvement of Watermarking Image (워터마킹 영상의 비가시성 개선에 관한 연구)

  • Kim, Hyeong-Gyun;Lee, Yang-Weon
    • Journal of Advanced Navigation Technology
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    • v.11 no.3
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    • pp.329-336
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    • 2007
  • 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 digital watermarking algorithm for preventing forged attack, ownership protection and authentication by transforming the wavelet algorithms in frequency domain in terms of human visual system.

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Asymmetric Watermarking Using Public Key Infrastructure (공개키 기반 구조를 이용한 비대칭 워터마킹)

  • Jun Young-Min;Yang Sun-Ouk;Kim Gye-Young
    • Journal of Korea Multimedia Society
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    • v.7 no.9
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    • pp.1282-1293
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    • 2004
  • This paper proposes an asymmetric watermarking system using Public Key Infrastructure. The distinguishing characteristic of the proposed method connects between the two different techniques, cryptography technique and watermarking technique, by using the authentication technique. The connection between the two techniques are established based on the special qualities of each technique. Watermarks that are inserted into the digital contents consist of a digital signature described as an encrypted copyright information with the private key of a distributor or a copyright holder, and an authentication code. In the situation where the ownership of the digital contents has to be decided, authentication technique examines the data integrity of the digital contents based on an authentication and decides the ownership of the digital contents by examining whether it satisfies or not satisfies the integrity test. The formal case uses decryption method which compares the user defined copyright information, and the decrypted copyright information extracted from the watermark in the digital contents that are decrypted by distributors' public key The latter case determines the ownership by comparing the similarity between encrypted copyright information separated from the watermark that are extracted from the digital contents, and the user defined encrypted copyright information that are separated from the watermark The proposed method provides protection from the assault which attempts to identify or erase the encoding key.

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A New Digital Watermarking for Architectural Design Drawing Using LINES and ARCs Based on Vertex (건축설계도면상에서 꼭지점에 기반한 LINE과 ARC를 이용한 디지털 워터마킹)

  • Jang, Bong-Ju;Moon, Kwang-Seok;Young Huh;Kwon, Ki-Ryong
    • Proceedings of the IEEK Conference
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    • 2003.11b
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    • pp.247-250
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    • 2003
  • This paper proposed to digital watermarking technique for architectural drawing using LINES and ARCs based on vertex in CAD system to prevent infringement of copyright from unlawfulness reproductions and distribution. After extract LINES and ARCs from designed drawing, we embed watermarks using adaptive algorithm in each characteristics. Watermarks robust to various attacks like as geometrical transformation as being embedded in LINE's length and ARC's angle information. Also, the proposed method satisfies enough transparency about watermarked drawing because have suitable embedding strength to each component. By experimental result, we confirmed robustness and invisibility of embedded watermarks in several conversions of architectural design drawing.

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Digital Watermarking using Phase hologram and Optical Interferometer (위상 홀로그램과 광학적 간섭계를 이용한 디지털 워터마킹)

  • 김병열;조규보;신창목;서동환;김수중
    • Proceedings of the IEEK Conference
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    • 2002.06b
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    • pp.87-90
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    • 2002
  • A digital watermark is an invisible mark embedded in a digital image which used for copyright protection. In this paper, we propose a new optical watermarking system. A optical watermarking system is applied for digital watermarking by phase hologram and Mach-Zehnder interferometer. A optical watermarking technique to be hidden is phase modulated in a random patten, and its Fourier-transformed hologram image is superposed on a content image. The autentication information extract by using Mach-zehnder interferometer.

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Digital Watermarking using Phase hologram and Optical Interferometer (위상 홀로그램과 광학적 간섭계를 이용한 디지털 워터마킹)

  • 김병열;조규보;신창목;서동환;김수중
    • Proceedings of the IEEK Conference
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    • 2002.06a
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    • pp.227-230
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    • 2002
  • A digital watermark is an invisible mark embedded in a digital image which used for copyright protection. In this paper, we propose a new optical watermarking system. A optical watermarking system is applied for digital watermarking by phase hologram and Mach-Zehnder interferometer. A optical watermarking technique to be hidden is phase modulated in a random patten, and its Fourier-transformed hologram image is superposed on a content image. The autentication information extract by using Mach-zehnder interferometer.

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The Application of Digital Watermarking in Remote Sensing Image

  • Jin, Peidong;Qin, Xuwen
    • Proceedings of the KSRS Conference
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    • 2003.11a
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    • pp.1264-1267
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    • 2003
  • To protect the digital image, video and audio from non-authorized use, the digital watermarking technology has received a great attention in the field of multimedia in recent years . An overview of the development of watermark techniques is given in the current paper followed by a discussion of potential application of spatial domain, transform domain watermark techniques in remote sensing images copyright protection and verification in different forms of processed images.

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The Effective Protection Mechanism for Digital Images using Transform of the Wavelet in Frequency Domain (주파수 영역에서 웨이브릿 변환을 이용한 디지털 이미지의 효과적인 보호)

  • 최우진;오무송
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.6 no.6
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    • pp.937-942
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    • 2002
  • 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.

Watermarking Technique for the Digital Contents Protection (디지털콘덴츠 보호를 위한 워터마킹 기술)

  • Song Hag-hyun;Kim Yoon-ho
    • Journal of Digital Contents Society
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    • v.5 no.1
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    • pp.66-72
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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 ilegal 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 chi the digital content copyright protection method(DRM). Most of previous digital watermarking have embeded to the content. In this paper, we have researched the standardization of digital rights management and developed more efficient watermark embedding method.

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Implementation of A Real Time Watermark Embedding System for Copyright Protection of Digital Broadcasting Contents (디지털 방송 콘텐츠 저작권 보호를 위한 실시간 워터마크 삽입 시스템 구현)

  • Jeong, Yong-Jae;Park, Sung-Mo;Kim, Jong-Nam;Moon, Kwang-Seok
    • Journal of the Institute of Convergence Signal Processing
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    • v.10 no.2
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    • pp.100-105
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    • 2009
  • A watermarking for copyright protection of digital contents for broadcasting have to be made for a real-time system. In this paper, we propose a real-time video watermarking chip and system which is hardware based watermark embedding system of SD/HD video. Our chip is implemented by FPGA which is STRATIX device from ALTERA, and our system is implemented by GS1560A and GS1532 devices from GENNUM for HD/SD video signal processing. There was little visual artifact due to watermarking in subjective quality evaluation between the original video and the watermarked one. Embedded watermark was all extracted after a robustness test called natural video attacks such as A/D conversion and MPEG compression. Our implemented watermarking hardware system can be useful in movie production and broadcasting companies that requires real-time based copyright protection system.

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Watermarking Algorithm for Copyright Protection of Haegeum Sound Contents (해금 사운드 콘텐츠의 저작권 보호를 위한 워터마킹 알고리듬)

  • Hong, Yeon-Woo;Kang, Myeong-Su;Cho, Sang-Jin;Chong, Ui-Pil
    • Journal of the Institute of Convergence Signal Processing
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    • v.10 no.4
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    • pp.214-219
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    • 2009
  • This paper proposes a watermarking algorithm considering the frequency characteristics of Haegeum sounds for copyright protection of digital Haegeum sound contents. The harmonics of Haegeum sounds commonly have large magnitude values in 1500Hz~2000Hz and 2800Hz~3500Hz so that those bands are selected to embed a watermark. The proposed method computes the FFT (fast Fourier transform) of the original sound signal and embeds the watermark bits generated by PN (pseudo noise) sequence into the harmonics in the selected bands. Furthermore, the proposed method is robust to lowpass filter, bandpass filter, cropping, noise addition, MP3 compression attacks and the maximum BER (bit error rate) is 1.41% after lowpass filter attack. To measure the quality of the watermarked sound, subjective listening test, MUSHRA (multiple stimuli with hidden reference and anchor), was conducted. The mean value of MUSHRA listening test is bigger than 98 and 96.67 for every Haegeum sounds and Korean classical music with Haeguem, respectively.

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