Block encryption method and schemes for data confidentiality...
Broadcast data access controller communication system
Broadcast encryption
Broadcast system for scrambled programming signals
Broadcasting system
Broadcasting system, and charging system and method
Cable system having multiple barkering
Cable television setback decoder automatic control
Cable television system
Cable television system having dynamic market code shuffling
Cable TV system using passwords
Cable TV system using passwords
Calculating apparatus and method of encrypting/decrypting commun
Calculation apparatus and encrypt and decrypt processing...
Calculation unit for executing a cryptographic protocol
Call signs
Canal+ decoder switching circuit for video cassette recorders
Capability security for transparent distributed object systems
Card charging systems
Card-computer moderated systems