73799426
May 11, 1989
Dec 10, 1991
ELECTRONIC CIPHERING AND DECIPHERING SYSTEMS AND ELECTRONIC ENCRYPTION SYSTEMS COMPRISING STATIONARY [ OR PORTABLE ] INFORMATION PROCESSING TERMINALS, FACSIMILE TRANSMISSION AND RECEPTION UNITS, DATA CIPHERING AND PROGRAMMING UNITS, VOICE ENCRYPTION, TRANSMISSION, AND RECEPTION UNITS, [ VOICE SCRAMBLING UNITS, ] BULK (MULTIPLEX) DATA ENCRYPTION UNITS, ON-LINE DATA ENCRYPTION UNITS, CIPHERING UNITS FOR [TELEPRINTER AND] LOW SPEED TERMINALS, CIPHERING UNITS FOR ELECTRONIC MAIL TERMINALS, CIPHERING UNITS FOR PACKET SWITCH NETWORK LINKS, [ POCKET CIPHERING UNITS, ] OFF-LINE ENCRYPTION SYSTEMS, PARTS AND PERIPHERALS THEREFOR ALL FOR USE IN SECURE COMMUNICATIONS
Electrical and Scientific Apparatus