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I just realized that so many people in the company simply don’t understand, or don’t want to understand, the Purdue Model!
The Purdue Model is a functional model. Its origins have nothing to do with cybersecurity. It was adopted for cybersecurity, but not as a “zone” model. Its purpose is to define the functional layers at which different methods and tools are used. You don’t simply use typical IT tools at the lower levels!
The DMZ was added much later, as the model evolved into a cybersecurity model. “Additional segmentation can be performed using the concept of zones and conduits described in ISA 62443.” The layers are not intended to define a zone per se. Anyone who does not divide the layers into discrete security zones based on an analysis should not even attempt to work in this (OT) area!
Furthermore, individuals have the flexibility to design their own separation, segmentation, and zone configuration within each architecture, taking into account specific functional and application-related requirements. This approach enables the creation of a robust defense in depth, with the Purdue model serving as a guide while allowing for customization as needed, without rigid requirements.
I will not show these guys how the ISA62443 and the Purde model match. Because I expect that experts can do it and those who can't do it have to learn.
ICS[AP] Dashboards are updated with the 8 CISA Advisories released on 3/19/26:
Schneider Electric: 4 New
Mitsubishi Electric: 1 New
CTEK: 1 New
IGL-Technologies: 1 New
Automated Logic: 1 New
www.icsadvisoryproject.com
#icssecurity
#otsecurity
#vulnerabilitymanagement
🚨 New research today from Team82 reveals cyber-physical systems (CPS) are becoming a preferred target for opportunistic threat actors, who are often inspired politically and socially by geopolitical events.
Analyzing 200+ attacks against CPS in numerous industries, the findings show:
🔹 82% used virtual network computing (VNC) to access exposed, internet-facing assets
🔹 66% involved compromised HMI or SCADA systems
🔹 Many attacks required minimal sophistication, yet posed serious risks to operations, safety, and the public
#Team82 #CyberPhysicalSystems #OTSecurity #ThreatIntelligence #CriticalInfrastructure #Cybersecurity
ICS[AP] Dashboards are updated with the 6 CISA Advisories released on 3/17/26:
FESTO, CODESYS: 1 New | 1 KEV Match
Schneider Electric: 2 New | 1 Update
Siemens: 1 New
Hitachi Energy: 1 Update
www.icsadvisoryproject.com
#icssecurity
#otsecurity
#vulnerabilitymanagement
OT grid infiltration is no longer theoretical. A compromised controller can cause shutdowns. InfosecK2K fortifies industrial networks with visibility, access segmentation, and real-time detection to protect systems
#Cybersecurity #OTSecurity #CriticalInfrastructure #InfoSecK2K
With cyber-physical systems (CPS) becoming increasingly central to logistics, supply chains, and industrial operations, protecting them goes beyond traditional IT security. 🌐 It requires a holistic approach that bridges #IT and #OT, providing full visibility, prioritizing risk, and ensuring operational continuity.
🔖 Our latest blog explores how Claroty helps organizations safeguard the CPS that power global supply chains. Read here: https://claroty.com/blog/protecting-the-cyber-physical-systems-that-power-global-supply-chains
#CyberPhysicalSystems #OTSecurity #SupplyChainSecurity #CyberResilience #IndustrialCybersecurity
🚨 The recent cyberattack on Michigan-based medical tech manufacturer Stryker shows that threats now come not only from state actors but also from opportunistic hacktivist groups with geopolitical motives.
In this blog, we explore what the attack reveals about how global conflict is reshaping OT and cyber-physical systems (CPS) security, with impacts that go far beyond IT—threatening operational continuity, supply chains, and safety in #industrial environments.
Stay informed on these evolving risks and learn how to strengthen your organization’s resilience.
📖 Read here:
https://claroty.com/blog/stryker-cyberattack-brings-geopolitical-conflict-to-manufacturing
#CyberPhysicalSystems #OTSecurity #ManufacturingSecurity #CyberThreats #CriticalInfrastructureSecurity #Stryker #Handala
While Stryker is a medical technology manufacturer, the implications of this attack and global outage are applicable across critical infrastructure organizations, especially those heavy in CPS assets. Stryker manufactures devices and equipment used in hospitals including surgical instruments, robotic assisted surgery s...
With cyber-physical systems (CPS) becoming increasingly central to logistics, supply chains, and industrial operations, protecting them goes beyond traditional IT security. 🌐 It requires a holistic approach that bridges #IT and #OT, providing full visibility, prioritizing risk, and ensuring operational continuity.
🔖 Our latest blog explores how Claroty helps organizations safeguard the CPS that power global supply chains. Read here: https://claroty.com/blog/protecting-the-cyber-physical-systems-that-power-global-supply-chains
#CyberPhysicalSystems #OTSecurity #SupplyChainSecurity #CyberResilience #IndustrialCybersecurity
Theevolvedge
Michael Koerfer
ICS Advisory Project
Claroty
InfosecK2K