Plant Floor Defence by Kai London
OT security fails at the point where good intentions meet a running plant: no maintenance window, unsupported controllers, a vendor who needs access tonight. This workbook is built around that reality — structured exercises and worksheets that a site team can complete together and turn into a credible improvement plan.
What the book covers
Asset and connection inventory
Worksheets for building a usable picture of devices, protocols, external links and who maintains them.
Zones and conduits
Applying IEC 62443 segmentation to a real site layout, including the awkward legacy cases.
Remote and vendor access
Designing supervised access that engineering will actually use, with time-bound approval.
Patching under constraint
Compensating controls, risk acceptance and maintenance-window planning where updates are not possible.
Detection and monitoring
What to collect in an OT network, and how to make alerts meaningful to control-room staff.
Exercises and response
Tabletop scenarios for site teams, safe-shutdown decision points and recovery rehearsal.
Who it is for
OT and ICS security practitioners, control-systems and plant engineers, site and operations managers, and IT security teams taking on responsibility for industrial estates.
About the author
Professor Kai London — CISSP, CISM.
An internationally recognised cybersecurity executive, board advisor and Founder & CEO of Quantum AI Systems Security LLC, writing at the convergence of AI, governance and operational resilience. Honorary Professor and Researcher at UCL.