Digital audio scrambling system with pulse amplitude modulation
Digital broadcast transmitting and receiving system and transmit
Digital computer code word identification system
Digital computer system for executing encrypted programs
Digital cordless telephone apparatus
Digital dictation system with protection against unauthorized li
Digital information accessing, delivery and production system
Digital product dissemination and sale
Digital signature verification technology for smart credit card
Digital video signal process apparatus for use in a video tape r
Digital voice recording/reproducing apparatus
Disc serialization
Discrimination of malicious changes to digital information using
Distributed cryptographic object method
Distributed cryptographic object method
Distributed split-key cryptosystem and applications
Down-line transcription system for manipulating real-time testim
Down-line transcription system for manipulating real-time testim
Down-line transcription system for manipulating real-time testim
Dual purpose security architecture with protected internal opera