Cloud Security Solutions for Manufacturing

The Convergence of OT and IT

Connected manufacturing and the convergence of traditional IT systems with OT increase an organization’s attack surface. There are just so many new systems connected to the network, such as: 

• Industrial Control Systems (ICS): Programmable Logic Controllers (PLCs), Contrôle de surveillance et acquisition de données (SCADA), Distributed Control Systems (DCS), etc.
• Manufacturing Execution Systems (MES): Production scheduling systems, Quality Management Systems (QMS), inventory and material tracking systems, etc.
• Sensors: Temperature, pressure, vibration, etc.

Historically, factories relied on an “air gap,” keeping production systems physically isolated from external networks. That model isn’t viable in a world where OT must be constantly available and requires real-time cloud connectivity to enable advanced technologies such as digital twins or AI analytics. The emphasis on availability in OT security, compared to confidentiality in IT security, can also complicate manufacturing protections. Any cloud security controls for manufacturing cannot introduce significant latency, as they may slow production or trigger safety sensors.

New interconnected systems online create more opportunities for cybercriminals to compromise networks and more infrastructure for security teams to protect. The potential for misconfigurations and vulnerabilities rises dramatically, especially when dealing with legacy OT systems that were never designed to connect to cloud environments. For example, many factories still rely on decades-old PLCs and industrial systems, often running unpatched or unsupported operating systems.

Finally, once on the network, there are more opportunities for lateral movement and more systems to disrupt. Therefore, a successful cyberattack can have much greater reach and impact. Attacks disrupting a software company’s operations can cause applications to go offline and limit customer access. However, the impact is largely confined to the virtual environment and can often be restored with backup systems. 

In contrast, there is no workaround to a physical production line grinding to a halt. Plus, downtime in manufacturing translates directly into financial and operational damage with immediate, cascading consequences, including missed production targets, supply chain delays, and contractual penalties. Cloud security for manufacturing will always carry higher stakes as it protects real-world production systems.

Cloud Security Risks in Manufacturing

While factories have gotten smarter over the years, so have the cybercriminals. The Manufacturing Security Report by Check Point Research found that attacks on the manufacturing sector increased by 30% from the year before, to 1,585 per week. Plus, 22% of ransomware victims in the previous year were in the manufacturing industry. An industry that has undergone rapid digital transformation in recent years, has high downtime costs and often operates on fine margins, manufacturing is an ideal target for ransomware groups.

Cloud-related risks due to the tight integration of IT systems with physical operations in manufacturing include:

• IT-to-OT Lateral Movement: Often begins with a simple phishing email targeting office staff, but once inside the IT network, malware can spread into connected OT systems. From there, it can encrypt or disable production controllers, bringing entire assembly lines to a halt.
• Shadow OT and Shadow AI: Engineers and plant operators, seeking efficiency gains, may connect production systems directly to public cloud platforms or AI tools without oversight from IT or security teams. While well-intentioned, this can expose sensitive intellectual property.

• Supply Chain “Island Hopping”: Attackers increasingly compromise smaller vendors, exploiting their trusted access pathways to gain access to larger manufacturing networks. These indirect entry points are often overlooked but can be highly effective.

• Integrity Attacks (Data Poisoning): Instead of shutting systems down, attackers may manipulate cloud data feeds, such as temperature thresholds or calibration values, leading to product defects or spoilage without immediate detection.

• Digital Twin Desynchronization: Attackers target digital twin environments, altering simulation data such that engineers unknowingly implement harmful settings in real-world machinery. 

Cloud Security Solutions for Manufacturing Companies

To minimize these cloud risks, manufacturing organizations require a multi-layered security strategy that reflects the complexity of connected production environments. This includes cloud security solutions that protect both digital systems and physical operations. Implementing these technologies as part of a cohesive cloud security for manufacturing strategy helps reduce risk while maintaining the performance and uptime that production demands.

Cloud security solutions manufacturing companies should consider include the following:

• Zero Trust Security Models: Rather than assuming any user or device inside the network is trustworthy, Zero Trust enforces continuous verification. For manufacturers, this means strictly controlling access between IT and OT systems, ensuring that a compromised office device cannot easily impact production hardware. This approach is critical for reducing the impact of compromised systems and preventing lateral movement attacks.
• Cloud Access Security Brokers (CASB): Provides visibility and control over how SaaS applications are used. In manufacturing, this is especially important for detecting Shadow OT and unauthorized cloud usage. CASB solutions can enforce policies that prevent sensitive production data from being uploaded to unapproved platforms, helping organizations maintain control over their intellectual property.
• Secure Access Service Edge (SASE): Combines networking and security into a unified, cloud-delivered service. SASE enables secure remote access for employees, suppliers, and partners who need to interact with manufacturing systems. In a global supply chain environment, SASE ensures that connections to factory networks are consistently protected, regardless of location, making it a key enabler of scalable cloud security in the Manufacturing industry. Both Zero Trust and CASB are also regularly deployed as part of a broader SASE framework. 
• Data Loss Prevention (DLP): Focuses on safeguarding sensitive information from accidental or intentional leaks. For manufacturers, DLP solutions monitor data in motion and at rest, ensuring that critical information is not exposed when uploaded or stored in the cloud.
• AI-Driven Threat Detection: Adds another layer of defense by identifying anomalies that traditional tools might miss. In manufacturing environments, AI can combine data from both IT and OT systems to detect unusual behavior, such as changes in machine performance or unexpected data flows. This capability is particularly valuable for identifying early signs of ransomware or integrity attacks, strengthening the overall resilience of manufacturing networks.

Ultimately, the effectiveness of these solutions depends on how well they are integrated. Disconnected tools can create gaps in visibility and response, especially in complex manufacturing ecosystems. A unified manufacturing cloud security strategy brings solutions together, enabling centralized monitoring, coordinated threat response, and consistent policy enforcement across all systems.

Best Practices for Securing Connected Factories

Securing modern, connected factories requires more than traditional IT controls; it demands practices tailored to manufacturing environments where uptime and safety are paramount. Best practices to follow for securing connected factories include:

• Asset Discovery & Visibility: The first priority is asset discovery and visibility. Manufacturers often have hundreds or thousands of connected devices, many of which are undocumented. You cannot secure what you cannot see, so organizations must implement automated, passive discovery tools that identify all IoT and OT assets communicating with the cloud. Unlike active scanning, which can disrupt fragile systems, passive monitoring ensures full visibility without increasing downtime.
• Segmentation du réseau : Many factories still operate with flat networks, where a single compromised device can expose the entire environment. Adopting a modern version of the Modèle Purdue with strict micro-segmentation helps isolate IT and OT systems. This prevents threats like ransomware from spreading laterally, jumping from a corporate email system to the factory floor.
• Patching virtuel : Because many OT devices cannot be taken offline for easy patching, virtual patching becomes a key defense. By deploying network-based Intrusion Prevention Systems (IPS), manufacturers can block known exploit attempts at the gateway level. This approach effectively shields vulnerable systems without interrupting operations, making it a practical cloud security strategy for manufacturing companies.
• Accès à distance sécurisé : With third-party vendors maintaining equipment, secure remote access can be a major concern. Traditional VPNs often provide overly broad access, increasing risk. Instead, Zero Trust Network Access (ZTNA) and SASE ensure that users can only connect to the specific machine or system they need. This granular control significantly reduces manufacturing attack surfaces.
• On-Device Protection: For newer IoT devices that support it, on-device protection offers an additional safeguard at the edge of the network. Lightweight runtime protections, often referred to as nano agents, can be deployed directly on devices to block malicious firmware updates or unauthorized commands.
• Industrial Protocol Policing: Standard firewalls cannot interpret specialized OT protocols like Modbus or PROFINET. By using deep packet inspection (DPI), manufacturers can monitor and control specific commands, blocking dangerous instructions like “write” or “stop” while still allowing safe data to flow to the cloud. This level of precision is vital for maintaining both security and operational continuity in manufacturing cloud security postures.

Safety & Standards and Compliance Considerations

Any effective cloud security for manufacturing approach must align with established industrial standards and evolving legal requirements, ensuring both digital protection and physical safety. However, as manufacturing environments become more connected, adhering to safety and security regulations becomes more complex.

A key framework to understand is IEC 62443, often considered the foundation of industrial cybersecurity. It introduces the concepts of zones and conduits, in which systems are segmented by risk and function, with controlled communication pathways between them. Cloud security architectures must map to these principles, ensuring that data flows between factory systems and cloud platforms are tightly governed.

For European companies, the NIS2 Directive places additional pressure on manufacturers classified as “essential entities.” These organizations are required to implement robust cybersecurity measures and demonstrate the ability to detect, respond to, and report incidents, particularly those that could disrupt supply chains. This makes proactive planning and documentation critical to cloud security compliance in manufacturing.

Finally, the growing emphasis on Software Bill of Materials (SBOM) requirements reflects the need for transparency in complex supply chains. Manufacturers must maintain detailed records of all software components within their OT environments, including embedded firmware. This enables rapid identification of vulnerabilities, such as widely exploited open-source flaws.