BY SySTem

PTC System Protection for Freight Rail

Positive Train Control (PTC) prevents collisions, overspeed, and unauthorized movements across freight networks. PTC spans onboard, wayside, and back-office systems, where integrity must be protected without disrupting safety enforcement.

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Challenges

The Main Challenges in Securing PTC Systems

PTC environments are closely tied to legacy freight protocols

PTC operates alongside long-established freight signaling, dispatch, and wayside technologies, many of which were not designed with cybersecurity in mind. This mix of modern safety systems and legacy protocols increases complexity and creates blind spots when security tools lack freight-specific awareness.

Communications span large geographies & variable connectivity

PTC relies on wireless communication between trains, wayside devices, and back-office systems across vast territories, yards, and remote segments. Intermittent connectivity, bandwidth constraints, and regional variation make it difficult to distinguish between normal freight operating conditions and anomalous system behavior.

Security actions must not interfere with safety enforcement

PTC is a safety-critical system subject to strict regulatory oversight, which limits the use of intrusive monitoring or active security controls. Any cybersecurity approach must preserve deterministic enforcement behavior and comply with regulatory and operational constraints unique to freight rail.

OUR Solution

How CylusOne Secures PTC Systems

Passive Monitoring of PTC Across Freight Operations

CylusOne secures PTC systems through passive observation of communications across onboard units, wayside interfaces, and back-office components, with awareness of freight rail protocols and operating patterns. It establishes a baseline of normal PTC behavior across mainline, yard, and regional operations without interfering with safety enforcement or triggering unintended penalty brake behavior.

Contextual Detection Within Freight Rail Protocols

CylusOne identifies deviations in PTC communications and interactions that may indicate cyber risk, misconfiguration, or unintended interaction with legacy freight systems. By understanding how PTC integrates with freight dispatching, signaling, and wayside protocols, teams can investigate anomalies in context rather than treating normal freight variability as a threat.

Rail-Safe Response Aligned to Operating Realities

CylusOne supports rail-safe response in PTC environments by providing system-level insights that reflect freight operational realities. It enables teams to carefully assess scope and impact at corridor level, coordinate across dispatch/OCC and SOC, and mitigate risk without disrupting safety-critical enforcement or the flow of freight traffic.

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