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Since the mid 1990s, data hiding has been proposed as an enabling technology for securing multimedia communication, and is now used in various applications including broadcast monitoring, movie fingerprinting, steganography, video indexing and retrieval, and image authentication. Data hiding and cryptographic techniques are often combined to complement each other, thus triggering the development of a new research field of multimedia security. Besides, two related disciplines, steganalysis and data forensics, are increasingly attracting researchers and becoming another new research field of multimedia security. This journal, LNCS Transactions on Data Hiding and Multimedia Security, aims to be a forum for all researchers in these emerging fields, publishing both original and archival research results. This issue consists mainly of a special section on content protection and forensics including four papers. The additional paper deals with histogram-based image hashing for searching content-preserving copies.

Engineering & Applied Sciences --- Computer Science --- Computer science. --- Computer communication systems. --- Computer security. --- Data encryption (Computer science). --- Algorithms. --- Pattern recognition. --- Computers and civilization. --- Computer Science. --- Systems and Data Security. --- Computer Communication Networks. --- Data Encryption. --- Algorithm Analysis and Problem Complexity. --- Computers and Society. --- Pattern Recognition. --- Civilization and computers --- Civilization --- Design perception --- Pattern recognition --- Form perception --- Perception --- Figure-ground perception --- Algorism --- Algebra --- Arithmetic --- Data encoding (Computer science) --- Encryption of data (Computer science) --- Computer security --- Cryptography --- Computer privacy --- Computer system security --- Computer systems --- Computers --- Cyber security --- Cybersecurity --- Electronic digital computers --- Protection of computer systems --- Security of computer systems --- Data protection --- Security systems --- Hacking --- Communication systems, Computer --- Computer communication systems --- Data networks, Computer --- ECNs (Electronic communication networks) --- Electronic communication networks --- Networks, Computer --- Teleprocessing networks --- Data transmission systems --- Digital communications --- Electronic systems --- Information networks --- Telecommunication --- Cyberinfrastructure --- Electronic data processing --- Network computers --- Informatics --- Science --- Foundations --- Protection --- Security measures --- Distributed processing --- Computer software. --- Optical pattern recognition. --- Cryptology. --- Optical data processing --- Pattern perception --- Perceptrons --- Visual discrimination --- Software, Computer --- Multimedia systems. --- Computer-based multimedia information systems --- Multimedia computing --- Multimedia information systems --- Multimedia knowledge systems --- Information storage and retrieval systems

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Since the mid 1990s, data hiding has been proposed as an enabling technology for securing multimedia communication, and is now used in various applications including broadcast monitoring, movie fingerprinting, steganography, video indexing and retrieval, and image authentication. Data hiding and cryptographic techniques are often combined to complement each other, thus triggering the development of a new research field of multimedia security. Besides, two related disciplines, steganalysis and data forensics, are increasingly attracting researchers and becoming another new research field of multimedia security. This journal, LNCS Transactions on Data Hiding and Multimedia Security, aims to be a forum for all researchers in these emerging fields, publishing both original and archival research results. This issue contains a special section on forensic image analysis for crime prevention including two papers. The additional four papers deal with collusion-resistant fingerprinting systems, phase correlation based image matching in scrambled domain, and visual cryptography.

Engineering & Applied Sciences --- Computer Science --- Computer security. --- Computer privacy --- Computer system security --- Computer systems --- Computers --- Cyber security --- Cybersecurity --- Electronic digital computers --- Security of computer systems --- Security measures --- Protection of computer systems --- Protection --- Computer science. --- Computer communication systems. --- Computer programming. --- Data encryption (Computer science). --- Pattern recognition. --- Computers and civilization. --- Computer Science. --- Computers and Society. --- Pattern Recognition. --- Programming Techniques. --- Systems and Data Security. --- Computer Communication Networks. --- Data Encryption. --- Data protection --- Security systems --- Hacking --- Civilization and computers --- Civilization --- Design perception --- Pattern recognition --- Form perception --- Perception --- Figure-ground perception --- Data encoding (Computer science) --- Encryption of data (Computer science) --- Computer security --- Cryptography --- Electronic computer programming --- Electronic data processing --- Programming (Electronic computers) --- Coding theory --- Communication systems, Computer --- Computer communication systems --- Data networks, Computer --- ECNs (Electronic communication networks) --- Electronic communication networks --- Networks, Computer --- Teleprocessing networks --- Data transmission systems --- Digital communications --- Electronic systems --- Information networks --- Telecommunication --- Cyberinfrastructure --- Network computers --- Informatics --- Science --- Programming --- Distributed processing --- Optical pattern recognition. --- Cryptology. --- Optical data processing --- Pattern perception --- Perceptrons --- Visual discrimination

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Since the mid 1990s, data hiding has been proposed as an enabling technology for securing multimedia communication, and is now used in various applications including broadcast monitoring, movie fingerprinting, steganography, video indexing and retrieval, and image authentication. Data hiding and cryptographic techniques are often combined to complement each other, thus triggering the development of a new research field of multimedia security. Besides, two related disciplines, steganalysis and data forensics, are increasingly attracting researchers and becoming another new research field of multimedia security. This journal, LNCS Transactions on Data Hiding and Multimedia Security, aims to be a forum for all researchers in these emerging fields, publishing both original and archival research results. This fourth issue contains five contributions in the area of digital watermarking. The first three papers deal with robust watermarking. The fourth paper introduces a new least distortion linear gain model for halftone image watermarking and the fifth contribution presents an optimal histogram pair based image reversible data hiding scheme.

Computer security. --- Data encryption (Computer science). --- Database security. --- Multimedia systems. --- Computer Science --- Engineering & Applied Sciences --- Data encryption (Computer science) --- Digital watermarking. --- Multimedia systems --- Security measures. --- Computer-based multimedia information systems --- Multimedia computing --- Multimedia information systems --- Multimedia knowledge systems --- Watermarking, Digital --- Data encoding (Computer science) --- Encryption of data (Computer science) --- Computer science. --- Multimedia information systems. --- User interfaces (Computer systems). --- Computers and civilization. --- Management information systems. --- Computer Science. --- Data Encryption. --- User Interfaces and Human Computer Interaction. --- Computers and Society. --- Systems and Data Security. --- Management of Computing and Information Systems. --- Multimedia Information Systems. --- Computer-based information systems --- EIS (Information systems) --- Executive information systems --- MIS (Information systems) --- Sociotechnical systems --- Information resources management --- Management --- Civilization and computers --- Civilization --- Interfaces, User (Computer systems) --- Human-machine systems --- Human-computer interaction --- Information storage and retrieval systems --- Computer security --- Cryptography --- Computer privacy --- Computer system security --- Computer systems --- Computers --- Cyber security --- Cybersecurity --- Electronic digital computers --- Protection of computer systems --- Security of computer systems --- Data protection --- Security systems --- Hacking --- Informatics --- Science --- Communication systems --- Protection --- Security measures --- Image steganography --- Watermarks --- Information Systems. --- Cryptology.

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Since the mid 1990s, data hiding has been proposed as an enabling technology for securing multimedia communication and is now used in various applications including broadcast monitoring, movie fingerprinting, steganography, video indexing and retrieval and image authentication. Data hiding and cryptographic techniques are often combined to complement each other, thus triggering the development of a new research field of multimedia security. Besides, two related disciplines, steganalysis and data forensics, are increasingly attracting researchers and becoming another new research field of multimedia security. This journal, LNCS Transactions on Data Hiding and Multimedia Security, aims to be a forum for all researchers in these emerging fields, publishing both original and archival research results. The seven papers included in this special issue were carefully reviewed and selected from 21 submissions. They address the challenges faced by the emerging area of visual cryptography and provide the readers with an overview of the state of the art in this field of research.

Data encryption (Computer science) --- Multimedia systems --- Security measures. --- Data encryption (Computer science). --- Computer security. --- Coding theory. --- Computer vision. --- Cryptology. --- Systems and Data Security. --- Coding and Information Theory. --- Image Processing and Computer Vision. --- Machine vision --- Vision, Computer --- Artificial intelligence --- Image processing --- Pattern recognition systems --- Data compression (Telecommunication) --- Digital electronics --- Information theory --- Machine theory --- Signal theory (Telecommunication) --- Computer programming --- Computer privacy --- Computer system security --- Computer systems --- Computers --- Cyber security --- Cybersecurity --- Electronic digital computers --- Protection of computer systems --- Security of computer systems --- Data protection --- Security systems --- Hacking --- Data encoding (Computer science) --- Encryption of data (Computer science) --- Computer security --- Cryptography --- Protection --- Security measures --- Information theory. --- Optical data processing. --- Optical computing --- Visual data processing --- Bionics --- Electronic data processing --- Integrated optics --- Photonics --- Communication theory --- Communication --- Cybernetics --- Optical equipment

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This book constitutes the thoroughly refereed post-conference proceedings of the 9th Interntaional Workshop on Digital Watermarking, IWDW 2010, held in Seoul, Korea, in October 2010. The 26 revised full papers presented were carefully reviewed and selected from 48 submissions. The papers are organized in topical sections on forensics, visual cryptography, robust watermarking, steganography, fingerprinting, and steganalysis.

Engineering & Applied Sciences --- Computer Science --- Computer security --- Data protection --- Digital watermarking --- Watermarking, Digital --- Computer science. --- Data structures (Computer science). --- Data encryption (Computer science). --- Coding theory. --- Information storage and retrieval. --- Computer graphics. --- Image processing. --- Computer Science. --- Data Encryption. --- Data Structures, Cryptology and Information Theory. --- Coding and Information Theory. --- Information Storage and Retrieval. --- Computer Graphics. --- Image Processing and Computer Vision. --- Pictorial data processing --- Picture processing --- Processing, Image --- Imaging systems --- Optical data processing --- Automatic drafting --- Graphic data processing --- Graphics, Computer --- Computer art --- Graphic arts --- Electronic data processing --- Engineering graphics --- Image processing --- Data compression (Telecommunication) --- Digital electronics --- Information theory --- Machine theory --- Signal theory (Telecommunication) --- Computer programming --- Data encoding (Computer science) --- Encryption of data (Computer science) --- Cryptography --- Information structures (Computer science) --- Structures, Data (Computer science) --- Structures, Information (Computer science) --- File organization (Computer science) --- Abstract data types (Computer science) --- Informatics --- Science --- Digital techniques --- Image steganography --- Watermarks --- Data structures (Computer scienc. --- Information storage and retrieva. --- Computer vision. --- Cryptology. --- Data Structures and Information Theory. --- Data structures (Computer science) --- Information retrieval. --- Data retrieval --- Data storage --- Discovery, Information --- Information discovery --- Information storage and retrieval --- Retrieval of information --- Documentation --- Information science --- Information storage and retrieval systems --- Machine vision --- Vision, Computer --- Artificial intelligence --- Pattern recognition systems --- Information storage and retrieval systems. --- Automatic data storage --- Automatic information retrieval --- Automation in documentation --- Computer-based information systems --- Data processing systems --- Data storage and retrieval systems --- Discovery systems, Information --- Information discovery systems --- Information processing systems --- Information retrieval systems --- Machine data storage and retrieval --- Mechanized information storage and retrieval systems --- Computer systems --- Electronic information resources --- Data libraries --- Digital libraries --- Information organization --- Information retrieval --- Information theory. --- Optical data processing. --- Optical computing --- Visual data processing --- Bionics --- Integrated optics --- Photonics --- Computers --- Communication theory --- Communication --- Cybernetics --- Optical equipment