Security system communications including encryption

摘要

A security system ( 20 ) includes a plurality of sensors ( 22 - 26 ) that provide an indication of a security condition to a corresponding plurality of microcontrollers ( 32 - 36 ). Each microcontroller communicates information regarding the security condition to a central control ( 40 ). The communications from the microcontroller include using an elliptical public key encryption for protecting a key associated with the security condition information. In a disclosed example, the security condition information is encrypted using a symmetrical encryption technique.