1. A method comprising: incorporating, by a computing system, a security co-processor into a circuit design modeling an electronic device; configuring, by the computing system, the security co-processor to monitor messages on an interconnect transmitted by an electronic component in the electronic device; and loading, by the computing system, one or more rules defining permissibility of the monitored messages on the interconnect in the electronic device, wherein the security co-processor is configured to utilize the rules to identify the monitored messages on the interconnect correspond to an unauthorized operation performed by the electronic component in the electronic device.