Scrambled-communication system using adaptive transversal filter

Secure cryptographic processor arrangement

Secure mass storage system for computers

Security apparatus and system for retail environments

Security apparatus for data transmission with dynamic random enc

Self-verifying identification card

Stream cipher system with feedback

Switching matrix

System and method for certifying content of hard-copy documents

System and method for controlling the dispensing of an authentic

System and method for dispensing postage based on telephonic or

System and method for enhancing detection of counterfeit financi

System and method for registgration using indicia

System and process for guaranteeing signatures on securities

System for detecting unaccounted for printing in a value printin

System for encoding and decoding data in machine readable graphi

System for encoding data in machine readable graphic form

System for encoding data in machine readable graphic form

System for producing verifiable kiosk receipts and records

System for seamless processing of encrypted and non-encrypted da