Patent ID: 6856237

Claim:
Apparatus for multiple-user security systems adaptable for sending and decoding encrypted signals, including: a first transmitter capable of emitting a first signal that including a button signal portion, a facility code signal portion, a first transmitter identification signal portion, a discrimination signal portion, and a first synchronization signal portion, at least one of said portions being encrypted; a receiver capable of receiving said first signal and decoding said encrypted portion of said first signal, said receiver including a timer for computing duration between emitted signals and a reference discrimination code, said receiver further capable of automatically recognizing said first transmitter when a button on said receiver first transmitter is pressed; a second transmitter capable of emitting a second signal; an algorithm for recognizing and processing said second transmitter's signal without manually teaching said second transmitter into said receiver; and said receiver being capable of outputting a command affecting a secured clearance based on said algorithm.