1. A non-transitory machine readable medium, on which are stored instructions, comprising instructions that when executed by a processor cause a machine to: receive first monitored information from digital sensors over a first channel for a control system, wherein the first monitored information is digital information and includes at least one primary parameter of the control system; receive second monitored information from analog sensors over a second channel for the control system, the second monitored information being analog information, and wherein the second channel is independent of the first channel; determine at least one secondary parameter for the control system responsive to receiving the second monitored information, wherein the at least one secondary parameter is digital information; detect a difference between the at least one primary parameter and the at least one secondary parameter; and provide an alert responsive to detecting the difference, wherein the digital sensors and the analog sensors are associated with the control system.