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Abstract

Disclosed is a scrambler/encryption system for randomizing an information-containing data signal for transmission and for reproducing the original information at a receiver. The information-containing data to be transmitted, encoded with a preselected base of a numeric system, is applied to a modulo adder appropriate for that base. An output of the modulo adder is applied as an input to a multistage shift register. An arbitrary logic networ, having a plurality of inputs, connected to a plurality of stages of the shift register, responds to the arbitrary logic's selected code and the contents in the register by delivering an output signal to the modulo adder. At the receiver the inverse operation is accomplished by a circuit which includes substantially the same components except the modulo adder receives the scrambled/encrypted input signal which is fed into the receiver's shift register. The receiver's modulo adder and the arbitrary logic network self-synchronously decode the original information-containing data signal.

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First Claim