Digital Watermarking 2001 4 11 Security EPayment Ahn

Digital Watermarking 날짜 : 2001. 4. 11. 과목명 : Security & E-Payment 팀원 : Ahn Joongmin(2001064) Jo Wonsun(2001126) Kim Yoonjeong(2001024)

목차 1. Introduction 2. Digital Rights Management and Digital Watermarking 3. Technical Review of Digital Watermarking 4. Business Perspectives of Digital Watermarking 2

2. DRM and Digital Watermarking n 적용분야 • 음악 : MP 3, AAC, WMA 등 AUDIO FORMAT • 동영상 : MPEG, WMA, AVI, MOV 등 VIDEO FORMAT • 전자출판 : PDF, XML등 PORTABLE DOCUMENT FORMAT • 의료 : 16 Bit Grayscale, 24 Bit Color Images FORMAT • 교육 : PDF, GVA 등 전자출판 및 원격강의용 FORMAT • 만화 : SWF 등 ANIMATION용 FORMAT 9

3. Technical Review n Watermarking 과정 Watermark information Encoder Watermark detector Decoder Watermark Information Watermarked media Original media Signal Human perceptual System(ear, eye. . ) Perceived Media (sound, image, etc) 워터마크도 디지털 데이터형태로 삽입된다. 사람은 인식 불가능하나 검출기로는 검출된다. 삽입, 검출 과정에 Key 사용 14

3. Technical Review n Challenges…. 모든 용도의 요구 조건을 만족 시키기가 어려움, 비용상승 다양한 기법들의 특성을 이용하여, 적절한 용도에 저작권 보호를 가능하게 하는 해결책으로 대두되고 있음 “ 디지털 데이터에 대한 저작권 보호의 핵심 기술 ” * 표준화그룹 CPTWG(Copy Protection Technical Working Group) MPEG(Moving Picture Expert Group) DAVIC(Digital audio Visual Council) SDMI(Secure Digital Music Initiative) 19

3. Business Perspectives n Domestic Multimedia Marketplace 단위 : 백만원 온라인 컨텐츠 매출액 업체수 컨텐츠 관련 매출총액 합계 업체평균 전체 1, 202 410, 600 342 1, 269, 055 1, 056 일반CP 온라인 게임 * 교육 384 130, 420 341 382, 972 1, 000 206 120, 802 586 137, 105 666 188 53, 975 287 123, 571 657 영화 112 23, 358 209 222, 175 1, 984 음악 105 16, 279 155 195, 880 1, 866 e-Book 86 7, 011 82 142, 863 1, 661 신문 121 58, 755 486 64, 489 533 <한국소프트웨어진흥원, 1999> 21

3. Business Perspectives n Is watermarking valid for illegal duplication? (Provider) n Reason for Inefficiency of watermarking >>> Weakness of technological liability >>> Difficulty of control on individual’s duplication 22

3. Business Perspectives n Digital Distribution of Music file Worldwide marketplace Domestic electronic marketplace of MP 3(‘ 1998) 23

3. Business Perspectives n Trend of World Music Marketplace l P 2 P(Peer-to-Peer) - 개인 대 개인이 집중화된 서비스 체계의 개입 없이 음악이나 영상 또는 텍스트 파일 등의 Contents를 직접 교류하는 형태의 온라인 커뮤니케이션 - Napster, 소리바다, . . l Regulation on the Internet Piracy l SDMI(Secure Digital Music Initiative) l Legal and Technological Defense - Difficulty to develop protecting technology - Taking time to digitizing whole catalogues Ratio piracy to legitimate sale of music industry <IFPI, 2001> 24

3. Business Perspectives n Several ways of payment for Mp 3 downloading n Encoding System n 1 st Step – Take Watermarking (eg. Veterance Technologies) (Insert Copyright & other signal for tracing) 25

3. Business Perspectives n E-Book Market perspectives l Forrest Research : E-Book, custom-printed books, textbooks 17. 5% l Amazon, Adobe team on E-Book(2001. 4. 10) - 6 percent of college book sales would be in electronic form by 2005 n Barrier of E-Book Market Expansion l Difficulty to acquire contents l High hardware cost l Problem for protection technology 27