Protecting critical industrial systems.
The cybersecurity of industrial systems — also known as OT cybersecurity (Operational Technology) — has become a critical issue for industrial sites. Ransomware attacks, targeted intrusions and supply chain compromises can paralyse production, compromise safety systems and cause major physical and financial damage. Unlike IT systems, OT systems have specific constraints: real-time sensitivity, requirement for continuity of service, equipment lifecycles measured in decades and often a complete absence of initial security design.
AUTOM Technologies offers an OT cybersecurity approach grounded in the IEC 62443 standard, the international reference for the security of industrial automation and control systems (IACS). Our interventions cover the entire security chain: from risk analysis and architecture design to technical implementation and qualification.
Our cybersecurity approach
Audit and risk analysis (IEC 62443 / NIST CSF)
We carry out OT cybersecurity audits of industrial installations: inventory of systems and communication flows, identification of vulnerabilities (obsolete firmware, open ports, weak authentication, unencrypted protocols), assessment of security levels (SL — Security Level) according to IEC 62443 and gap analysis against the target security level. These audits produce a risk assessment report and a prioritised remediation plan.
IT/OT segmentation and zone architecture
Segmentation between IT (office networks) and OT (industrial networks) domains is a fundamental cybersecurity measure. We design and implement zone and conduit architectures in compliance with IEC 62443-3-3: demilitarised zones (DMZ), industrial firewalls (Fortinet FortiGate, Cisco ASA), unidirectional data diodes for critical applications, VPN for remote access and network access control (NAC). Each data flow between zones is documented, justified and filtered.
Continuous monitoring and incident response
OT network monitoring enables early detection of abnormal behaviour: new equipment, unusual communication flows, blocked connection attempts. We deploy specialised OT security monitoring solutions (Claroty, Nozomi Networks) providing passive network visibility without impacting real-time processes. We also define incident response procedures adapted to industrial constraints, enabling rapid and controlled reaction to a security event.
Frameworks and standards
- IEC 62443 — International standard for the security of industrial automation and control systems (IACS)
- NIST Cybersecurity Framework (CSF) — Risk-based cybersecurity framework: Identify, Protect, Detect, Respond, Recover
- ANSSI Guidelines — ANSSI recommendations for industrial system operators of vital importance (OVI)
- NIS2 Directive — European directive on the security of network and information systems
- IEC 62351 — Security standards for energy automation protocols
Representative project
OT security architecture — Nuclear research installation
Design and implementation of the OT cybersecurity architecture for a nuclear research installation: IT/OT segmentation with industrial DMZ, deployment of Fortinet industrial firewalls, OPC-UA servers with certificate authentication, network monitoring with passive asset discovery, ANSSI-compliant security documentation and participation in the security qualification review.
Do you have an OT cybersecurity project?
Audit of an existing installation, secure architecture design or deployment of a monitoring solution — our team supports you at every stage of your industrial cybersecurity approach, combining regulatory expertise with concrete operational knowledge.
Why choose AUTOM Technologies for your OT cybersecurity project?
OT cybersecurity is not simply about applying IT security tools to an industrial environment — it requires a deep understanding of both the cyber threat landscape and the operational constraints of the plant. AUTOM Technologies bridges this gap. Our consultants hold IEC 62443 practitioner qualifications and have conducted security assessments for clients in nuclear energy, Oil & Gas and water treatment — sectors where the consequences of a cyber incident go well beyond data loss. We use Claroty and Nozomi Networks passive monitoring platforms to provide asset discovery and anomaly detection without any disruption to production. Our remediation roadmaps are always grounded in the operational reality of your site, prioritising the highest-risk vulnerabilities while maintaining the availability that your business depends on.