Product block cipher system for data security

Programmable cryptic device for enciphering and deciphering data

PSK modulator with reduced spectrum occupancy

Public key cryptographic apparatus and method

Pulse suppressing circuit arrangements and equipment incorporati

Random digital code generator

Random digital encryption secure communication system

Range division multiplexing

Readout for recording typewriter

Real-time simulation of a point system as viewed by a moving obs

Real-time simulation of a point system having textured areas as

Receiver for data transmitted by means of the interleaved binary

Receiver for pulses of different widths

Receiver including an automatic tuning correction suppression ci

Receivers for pulses of different widths

Recipient and message authentication method and system

Recognizer/converter for arabic and other language codes

Recording unidimensional holograms with reduced positional sensi

Reducing teleprinter errors caused by primary power frequency va

Reduction of message redundancy by multiple substitution: a mess