System for controlling access to a function having clock synchro

System for controlling access to a function, using a plurality o

System for controlling access to broadcast transmissions

System for conveying information for the reliable authentificati

System for cryptographing and identification

System for decoding and displaying personalized indentification

System for decoding transmitted scrambled signals

System for detecting unaccounted for printing in a value printin

System for detecting unauthorized account access

System for displaying the subscription state of a pay broadcasti

System for distributing digital information

System for diversifying information in a network for distributin

System for encoding personalized identification for storage on m

System for encryption and identification

System for identifying authenticating and tracking manufactured

System for limiting use of down-loaded video-on-demand data

System for preventing fraudulent use of credit card

System for printing encrypted messages with bar-code representat

System for processing user access control data at a decoder

System for protecting documents or objects enclosed in a tamper-