A security incident manger includes events and network flows in the analysis of an attack to better identify the magnitude of the attack and how to handle the situation. The beverage dispensing system is RFID-enabled by configuring the antenna to receive signals from radio frequency identification tag. One embodiment uses two computers Alice and Bob, and a Diffie-Hellman exponential key exchange in a large prime-order finite group. The load control device controls the power delivered to the electrical load in response to the ultrasonic waves received by the ultrasonic receiver.