A Methodology to Enhance Industrial Control System Security

The frequency and sophistication of cyber-threats towards Industrial Control Systems (ICS) continues to increase. This reality, coupled with the increased interconnectivity of ICS and enterprise networks and the utilisation of standard system platforms and operating systems, has raised the potential risk to both the security and safety of critical infrastructure. There is a growing awareness that the safety and security of ICS cannot be dealt with in isolation, it should be considered jointly. This paper proposes a methodology that harmonises safety and security within ICS environments. The findings also indicate that efforts to harmonise safety and security extends beyond deconflicting and implementing effective technical countermeasures - non-technical factors and the organisational context play an equally important part.