Abstract
This paper presents cybersecurity challenges related to industrial control systems (ICSs), identified through interviews with ICS asset owners. We interviewed participants from 10 companies within the oil and gas, food and beverage, and electricity generation and distribution industries in Norway. The interviews focused on cybersecurity challenges related to the three topics of supply chain, handling of vulnerabilities, and testbeds and digital twins. Thematic analysis of the interviews resulted in identification of 7 challenges, which can serve as inspiration and motivation for future research efforts in the field of ICS and Operational Technology (OT) cybersecurity.