• Title/Summary/Keyword: Digital Fingerprinting

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Implementation of commercial digital Forensic Marking systems (디지털 추적표시(For ensic Marking) 시스템 개발)

  • Kim, Jong-An;Kim, Jin-Han;Kim, Jong-Heum
    • 한국정보통신설비학회:학술대회논문집
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    • 2007.08a
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    • pp.142-146
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    • 2007
  • Digital Rights Management (DRM) technology has been widely used for protecting the digital contents over the recent years. But the digital contents protected by DRM are vulnerable to various video memory capture programs when DRM packaged contents are decrypted on the consumers' multimedia devices. To make up for this kind of DRM security holes the Forensic Marking (FM) technology is being deployed into the content protection area. Most leading DRM companies as well as big electronics companies like Thomson and Philips already have commercial FM solutions. Forensic Marking technology uses the digital watermarking to insert the user information such as user id, content playing time and etc. into the decrypted and decoded content at the playback time on the consumer devices. When the content containing watermarked user information (Forensic Mark) is illegally captured and distributed over the Internet, the FM detection system takes out the inserted FM from the illegal contents and informs contents service providers of the illegal hacker's information. In this paper the requirements and test conditions are discussed for the commercial Forensic Marking systems.

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디지털 핑거프린팅에 대한 공모 공격 기술

  • 김원겸;서용석;이선화
    • Review of KIISC
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    • v.16 no.1
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    • pp.49-58
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    • 2006
  • 디지털 핑거프린팅(Digital Fingerprinting) 기술은 온라인상에서 멀티미디어 콘텐츠의 저작권을 보호하기 위한 기술의 하나로 워터마킹(Watermarking) 기술과 같이 콘텐츠에 저작권을 증명하기 위한 부가정보를 비인지적으로 삽입하고 추출하는 기술이다. 핑거프린팅 기술에서는 주로 구매자의 정보를 삽입하기 때문에 콘텐츠를 처음 유포한 구매자를 역추적 할 수 있는 기능(trace traitor)을 제공한다. 본 고에서는 핑거프린팅 된 콘텐츠에서 악의적인 사용자가 핑거프린트를 제거하기 위하여 같은 콘텐츠를 구매한 다른 구매자와 공모하는 기술과, 이런 공모 후에도 핑거프린트를 추출할 수 있도록 삽입 코드를 공모 허용하도록 설계하는 공모보안코드에 대해 고찰한다.

Development of Forensic Marking technology for tracing multiple users (다중 불법콘텐츠 복제자 추적 기술 개발)

  • Kim, Jong-An;Kim, Jin-Han;Kim, Jong-Heum
    • 한국정보통신설비학회:학술대회논문집
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    • 2008.08a
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    • pp.102-106
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    • 2008
  • Forensic Marking is the technology that enables the service providers (SP) to identify the illegal digital contents distributors by first inserting markings (data indicating the user information and playback time) in realtime into the digital contents at time of playback of digital contents, and then later by extracting inserted markings from the contents which are illegally captured from the multimedia device such as IPTV STBs and distributed over the Internet. Digital Rights Management (DRM), which is a very popular content protection technology, has the security hole that can be vulnerable because the encrypted digital contents are transformed into their original plaintext forms after the decrypting process on the STBs. Therefore Forensic Marking (FM) has now become a companion content protection solution to DRM. This article describes a new way of tracking up to 4 illegal content users in FM implementation using the blue-difference chroma component of YCbCr color space. This FM technology has many advantages like fast processing time and easy portability to STB devices compared to that of the traditional watermarking processing in the frequency domain.

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Scalable Fingerprinting Scheme based on Angular Decoding for LCCA Resilience (선형결합 공모공격에 강인한 각도해석 기반의 대용량 핑거프린팅)

  • Seol, Jae-Min;Kim, Seong-Whan
    • The KIPS Transactions:PartD
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    • v.15D no.5
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    • pp.713-720
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    • 2008
  • Fingerprinting scheme uses digital watermarks to trace originator of unauthorized or pirated copies, however, multiple users may collude and escape identification by creating an average or median of their individually watermarked copies. Previous research works are based on ACC (anti-collusion code) for identifying each user, however, ACC are shown to be resilient to average and median attacks, but not to LCCA and cannot support large number of users. In this paper, we propose a practical SACC (scalable anti-collusion code) scheme and its angular decoding strategy to support a large number of users from basic ACC (anti-collusion code) with LCCA (linear combination collusion attack) robustness. To make a scalable ACC, we designed a scalable extension of ACC codebook using a Gaussian distributed random variable, and embedded the resulting fingerprint using human visual system based watermarking scheme. We experimented with standard test images for colluder identification performance, and our scheme shows good performance over average and median attacks. Our angular decoding strategy shows performance gain over previous decoding scheme on LCCA colluder set identification among large population.

Energy and Statistical Filtering for a Robust Audio Fingerprinting System (강인한 오디오 핑거프린팅 시스템을 위한 에너지와 통계적 필터링)

  • Jeong, Byeong-Jun;Kim, Dae-Jin
    • The Journal of the Korea Contents Association
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    • v.12 no.5
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    • pp.1-9
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    • 2012
  • The popularity of digital music and smart phones led to develope noise-robust real-time audio fingerprinting system in various ways. In particular, The Multiple Hashing(MLH) of fingerprint algorithms is robust to noise and has an elaborate structure. In this paper, we propose a filter engine based on MLH to achieve better performance. In this approach, we compose a energy-intensive filter to improve the accuracy of Q/R from music database and a statistic filter to remove continuity and redundancy. The energy-intensive filter uses the Discrite Cosine Transform(DCT)'s feature gathering energy to low-order bits and the statistic filters use the correlation between searched fingerprint's information. Experimental results show that the superiority of proposed algorithm consists of the energy and statistical filtering in noise environment. It is found that the proposed filter engine achieves more robust to noise than Philips Robust Hash(PRH), and a more compact way than MLH.

Detection of Colluded Multimedia Fingerprint using LDPC and BIBD (LDPC와 BIBD를 이용한 공모된 멀티미디어 핑거프린트의 검출)

  • Rhee Kang-Hyeon
    • Journal of the Institute of Electronics Engineers of Korea CI
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    • v.43 no.5 s.311
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    • pp.68-75
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    • 2006
  • Multimedia fingerprinting protects multimedia content from illegal redistribution by uniquely marking every copy of the content distributed to each user. Differ from a symmetric/asymmetric scheme, fingerprinting schemes, only regular user can know the inserted fingerprint data and the scheme guarantee an anonymous before recontributed data. In this paper, we present a scheme which is the algorithm using LDPC(Low Density Parity Check) for detection of colluded multimedia fingerprint and correcting errors. This proposed scheme is consists of the LDPC block, Hopfield Network and the algorithm of anti-collusion code generation. Anti-collusion code based on BIBD(Balanced Incomplete Block Design) was made 100% collusion code detection rate about the linear collusion attack(average, AND and OR) and LD% block for the error bits correction confirmed that can correct error until AWGN 0dB.

A Study on a Illegal Copy Protection model using Hidden Agent in Embedded Computing Environment (임베디드 컴퓨팅 환경에서 은닉 에이전트를 이용한 불법복사 방지 모델에 관한 연구)

  • Lee, Deok-Gyu;Kim, Tai-Hoon;Yeo, Sang-Soo;Kim, Seok-Soo;Park, Gil-Cheol;Cho, Seong-Eon
    • Journal of Advanced Navigation Technology
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    • v.12 no.2
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    • pp.180-190
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    • 2008
  • There have been researches into digital Watermarking technology or Fingerprinting vigorously to safeguard Protective rights for knowledge and poverty for digital contents. DRM(Digital Rights Management) is not only Protective rights for knowledge and poverty, but also management and systems that are necessary to put out, circulate and use for contents. This paper proposes two kinds of ideas. One is protecting contents from illegal acts such as illegal copies when the contents are in the process of circulation. The other is the protocol that can give users convenience. Hidden Agents are used so that contents are protected from illegal copies and illegal use in the contents and cuts off those illegal acts. The Agent will be installed without any special setup. In addition, it can replace roles of Watermarking as a protection. Therefore, this paper shows the solution of illegal copies that happens frequently.

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Fingerprinting Embedding Technique based on BIBD AND-ACC (BIBD AND-ACC 기반 핑거프린팅 삽입 기법)

  • SaKong, Myoung;Park, Yo-Han;Park, Young-Ho;Moon, Sang-Jae
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.48 no.7
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    • pp.41-47
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    • 2011
  • Recently, digital contents are used a lot due to the rapid development of Internet and the commercialization of smartphones. However variety of attacks, such as collusion attack, can violate the intellectual property rights. BIBD AND-ACC is typical method to protect digital contents from attacks, but it is hard to distribute many users because of the heavy complexity of matrix computation. In this paper, we propose embedding technique to distribute BIBD AND-ACC for many users more than primitive one. We checked the PSNR result as 50.84dB when amplication factor is one and found out the colluders who involved the collusion attack by simulation.

Digital Signature Using Fingerprinting for Web Page (웹페이지의 전자서명 핑거프린팅 기법)

  • Park, Su-Bin;Cho, Dong-Sub
    • Proceedings of the KIEE Conference
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    • 2008.10b
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    • pp.415-416
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    • 2008
  • 새로운 유비쿼터스 컴퓨터 환경 하에서 다양한 응용 서비스들은 사용자들의 편의성과 정보의 접근성을 향상시키고 있다. 그러나 정보의 고도화에 따른 역기능이 사회적 문제로 지적되고 있다. 특히 개방형 환경에서의 인가되지 않는 제 3자에 의한 공격은 사용자의 프라이버시 문제뿐만 아니라, 국가적 문제로 대두되고 있다. 따라서 안전한 유비쿼터스 컴퓨팅환경에서의 사회 경제활동을 위한 정보보호의 연구가 활발히 진행되고 있으며 이 중 전자서명은 개인의 프라이버시 보호뿐만 아니라 사회 경제활동의 근간을 제공할 수 있다. 따라서 본 논문에서는 안전한 유비쿼터스 환경 구현을 위한 전자서명 핑거프린팅 기법을 제안한다. 제안된 방식은 기존의 전자서명 방식의 제한성을 보완하여 이를 웹 페이지에 적용하고 HTML로 표현된 문서에 대한 안정성 향상을 제공할 수 있다.

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A Novel Copyright Protection for Digital Images Using Magnitude and Orientation of Edge (영상의 에지 크기와 각도를 이용한 정지영상 보호 기법)

  • Shin, Jin-Wook;Min, Byung-Jun;Yoon, Sook
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.33 no.3C
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    • pp.262-270
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    • 2008
  • We propose a technique to protect digital images using the magnitude and orientation of their edges. The proposed technique uses the content-associated copyright message generated by combining the original copyright message with the magnitude and orientation of some edges of a digital image. It enables the distribution of the original copyright message without any distortion of original digital images by avoiding embedment of the original copyright message into images. In addition to the advantage in the image quality, it also has a relatively low computational complexity by using simple operations to generate the content-associated copyright message. To verify the proposed technique, we performed experiments on its robustness to the external attacks such as histogram equalization, median filtering, rotation, and cropping. Experimental results on restoring the copyright message from images distorted by attacks show that more than 90%, on the average, can be recovered.