Digital watermarking Digital images 5 Watermarking 5 Digital techniques 4 Data encryption (Computer science) 3 Image processing 3 Security measures 3 Embedded computer systems 2 Multimedia systems 2 Wavelets (Mathematics) 2 Algorithms 1 Audio frequency 1 Computer networks 1 Computer programs 1 Computer security 1 Cryptography 1 Digital video 1 Editing 1 Electric networks 1 Measurement 1 Neural networks (Computer science) 1 Recording and reproducing 1 Sound 1