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A secure information broadcasting system including a central transmitting station for encoding data in binary form utilizing a keyword and transmitting a FM-SCA signal phase shift modulated by the encoded data. Each of a plurality of portable receiving terminals has an identification number stored t

A secure information broadcasting system including a central transmitting station for encoding data in binary form utilizing a keyword and transmitting a FM-SCA signal phase shift modulated by the encoded data. Each of a plurality of portable receiving terminals has an identification number stored therein. When a subscriber desires to display the broadcast information on his terminal, he enters a unique password which is combined with the identification number to generate the keyword. The keyword is utilized to decode the received binary data. The portable terminal includes a receiver for decoding the phase shifted FM-SCA signal into the encoded binary data; a keyboard for entering the password, information and display commands; an alpha-numeric data display; a processor responsive to the inputs from the receiver and the keyboard for performing selected arithmetic and logic operations to generate output data to the data display and a bus connecting the circuits of the portable terminal for parallel signal flow.

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A secure information broadcasting system including a transmitting station for encoding as binary coded bits data received from an information source, for modulating a carrier wave with the data bits and for transmitting the modulated carrier wave and a plurality of portable terminals for receiving a

A secure information broadcasting system including a transmitting station for encoding as binary coded bits data received from an information source, for modulating a carrier wave with the data bits and for transmitting the modulated carrier wave and a plurality of portable terminals for receiving and selectively displaying the data, each of said portable terminals comprising: receiver means for separating the modulation signal from the carrier wave and generating the encoded binary data bits from the modulation signal; keyboard means for generating a binary coded password individual to each of said portable terminals; storage means for generating a binary coded identification number individual to each of said portable terminals; and processing means responsive to said password and said identification number for generating a binary coded keyword having a predetermined number of bits, said processing means being responsive to said keyword and a number of said encoded binary data bits equal to said predetermined number for decoding said encoded binary data bits.