The document discusses cyber security challenges for industrial control systems (ICS) and supervisory control and data acquisition (SCADA) systems used in petroleum production. It notes that ICS/SCADA systems are no longer isolated and were not designed with security in mind, making them vulnerable to threats. It outlines potential threats from both external hackers and internal actors seeking to harm operations or steal information. The document then proposes a holistic cyber security approach including governance, technical safeguards, physical security, and crisis management to help mitigate risks. It acknowledges challenges in securing remote sites and ensuring security solutions work with ICS/SCADA systems and protocols.