The Flow security model lets you associate resources with finite-state machines, receive and modify the states of finite-state machines, and check whether the state of the finite-state machine is within the defined set of states. For example, a process can be associated with a finite-state machine to allow or prohibit this process from using storage and/or the network depending on the state of the finite-state machine.
A PSL file containing a description of the Flow security model is located in the KasperskyOS SDK at the following path:
toolchain/include/nk/flow.psl