US Patent 11882132 Content-based application security for distributed computing system

A computer-implemented method of monitoring security of a set of computing devices in a distributed system, the distributed system having a plurality of computing devices, in communication with one another over a network, by a security software running in a computer node. The method includes comparing an app signature of the application running in a selected one of the set of computing devices to a reference app signatures generated from a respective functional replica of the application.