STEGANOGRAPHY

Patent Number    Patent Title
6,430,302 Steganographically encoding a first image in accordance with a second image
6,289,108 Methods for detecting alteration of audio and images
6,252,963 Method for preventing reproduction of documents
6,240,185 Steganographic methods for securely delivering electronic digital rights management control information over insecure communication channels
6,185,683 Trusted and secure methods for item delivery and execution
6,122,403 Computer system linked by using information in data objects
6,111,954 Steganographic methods and media for photography
6,064,737 Anti-piracy system for wireless telephony
6,021,196 Reference palette embedding
6,011,849 Encryption-based selection system for steganography
6,005,936 System for embedding authentication information into an image and an image alteration detecting system
6,005,643 Data hiding and extraction methods
5,943,422 Steganographic techniques for securely delivering electronic digital rights management control information over insecure communication channels
5,832,119 Methods for controlling systems using control signals embedded in empirical data
5,748,763 Image steganography system featuring perceptually adaptive and globally scalable signal embedding