1. A non-transitory computer-readable medium embodying a program executable in at least one computing device, the at least one computing device executing a plurality of machine instances, and the program, when executed, causing the at least one computing device to at least: detect pattern of activity of a physical implementation of the at least one computing device corresponding to at least one side channel pattern, the side channel pattern embodying at least one communication from at least one of the plurality of machine instances; translate the at least one side channel pattern to generate the at least one communication; determine, based on the at least one communication, whether the at least one of the plurality of machine instances comprises a quorum of trusted machine instances; and initiate at least one action based at least in part on the determining.