Multimedia systems 37 Security measures 37 Data encryption (Computer science) 14 Computer security 13 Data protection 10 Digital watermarking 9 Intellectual property 9 Digital techniques 4 Recording and reproducing 4 Sound 4 Computational intelligence 2 Computer crime 2 Computer crimes 2 Computer network protocols 2 Computer networks 2 Copyright 2 Copyright and electronic data processing 2 Cryptography 2 Design 2 Embedded computer systems 2 Forensic sciences 2 Investigation 2 Handbooks, manuals, etc 1 Intellectual property infringement 1 Prevention 1 Technological innovations 1 Telecommunication systems 1