System and method of monitoring of the execution system of a programmable logic controller

A system for monitoring an execution system of a programming logic controller (PLC), the system comprising:

• a hardware processor executing a security module configured to:
• access the PLC execution system;
• divide the code and data of the PLC execution system into a plurality of program modules based on at least one of:
• a functional structure of the PLC execution system, a threat to the security of the PLC execution system, or criticality of the code and data of the PLC execution system;
• modify data exchange interfaces of the program modules used for the interaction between the program modules and the resources of the operating system such that said interaction occurs through the security module, while a format of the data being exchanged complies with a format specified by the security module;
• and
• monitor the execution of the PLC execution system, including monitoring the interaction of the program modules of the PLC execution system with each other and with the resources of the operating system.

A non-transitory computer readable medium storing thereon computer executable instructions for monitoring an execution system of a programming logic controller (PLC), including instructions for:

• accessing, by a security module executable by a processor, the PLC execution system;
• dividing, by the security module, the code and data of the PLC execution system into a plurality of program modules based on at least one of:
• a functional structure of the PLC execution system, a threat to the security of the PLC execution system, or criticality of the code and data of the PLC execution system;
• modifying, by the security module, data exchange interfaces of the program modules used for the interaction between the program modules and the resources of the operating system such that said interaction occurs through the security module, while a format of the data being exchanged complies with a format specified by the security module;
• and
• monitoring, by the security module, the execution of the PLC execution system, including monitoring the interaction of the program modules of the PLC execution system with each other and with the resources of the operating system.