1 Scope
This PAS establishes a framework for securing information and communication technology
aspects of industrial process measurement and control systems including its networks
and devices on those networks, during the operational phase of the plant ’s life cycle.
This PAS provides guidance on a plant ’s operational security requirements and is primarily intended for automation system
owners/operators (responsible for ICS operation)
Furthermore, the operational requirements of this PAS may interest ICS stakeholders
such as:
a) automation system designers;
b) manufacturers (vendors) of devices, subsystems, and systems;
c) integrators of subsystems and systems.
The PAS allows for the following concerns:
• graceful migration/evolution of existing systems;
• meeting security objectives with existing COTS technologies and products;
•
assurance of reliability/ availability of the secured communications services;