PROGRAM RANDOMIZATION FOR CYBER-ATTACK RESILIENT CONTROL IN PROGRAMMABLE LOGIC CONTROLLERS

摘要

A method for programmable logic controller (PLC) program randomization, the method comprising an engineering system computer receiving source code corresponding to a PLC program and compiling the source code into a plurality of functionally equivalent intermediate representations of the PLC program. Program structure of the PLC program is randomized during compilation such that each intermediate representation is unique among the plurality of intermediate representations. The engineering system computer transmits the plurality of intermediate representations to one or more PLCs.