Method and apparatus for use of a time-dependent watermark...

Method and apparatus to control copying from a drive device...

Method and device for controlling information signal recording

Method and device for incorporating additional information...

Method and system for escrowed backup of hotelled world wide...

Method and system for managing rights in digital information...

Method and system for managing rights in digital information...

Method and system for preventing unauthorized recording of...

Method and system for recording data on and reading data...

Method and system for robust embedding of watermarks and...

Method and system for tracing an analog copy of a digital...

Method and system verifying product licenses using hardware...

Method for modifying a copy protected video signal with a...

Method for preventing copying of digital video disks

Method for securing video images

Method for tracing the distribution of physical digital media

Method for transmitting data apparatus for recording data...

Method of adaptive control of the presence of a copy...

Method of managing copy protection information of a...

Method of secure server control of local media via a trigger...