Manual Dispatching and Rail Cybersecurity: Legacy Technology Offers No True Safety

Relying on obsolete technology to evade digital attacks is not a security advantage, but a fragile illusion that leaves critical infrastructure vulnerable to catastrophic human error.

The notion that maintaining outdated legacy technology provides a natural defense against modern cyber threats has become an ironic talking point across critical infrastructure sectors. In railway transportation, however, this mindset constitutes a dangerous fallacy that trades manageable technical risks for catastrophic operational hazards. Recent global disruptions, such as the unauthorized halting of dozens of trains via unencrypted radio commands in Poland and remote command injection vulnerabilities like CVE-2025-1727 in the United States, demonstrate that wireless communication layers are primary attack surfaces. This analysis examines the realities of telephone dispatching on conventional lines, the operational costs of false security, and the urgent necessity of modernizing unsignaled networks through encrypted communications and domestic engineering capability.

The False Illusion of Security Through Obsolescence

The claim that obsolete systems remain inherently safe from malicious cyber actors is occasionally raised as a comforting rationalization. It is technically true that isolated networks lacking digital interfaces or trackside electronic interlocking cannot be breached across internet gateways. However, in engineering terms, this absence does not constitute a defensive triumph; it merely masks a severe vulnerability under a different operational guise.

Refusing to modernize control and signaling layers leaves rail operations entirely dependent on human attention, verbal coordination, and fatigue limits. Escaping digital exploit attempts does not protect a rail corridor from two opposing trains entering the same track block due to misheard station orders. Comprehensive infrastructure security cannot be achieved by rejecting digital tools in favor of operational fragility.

Global Railway Cyber Threats and the Radio Frequency Attack Surface

Contemporary incidents across global railway networks demonstrate how adversaries target the intersection of operational technology and wireless communications:

The Polish Radio-Stop Incident: In August 2023, more than twenty passenger and freight trains across Poland were abruptly immobilized using basic radio transmitters. Rather than compromising complex corporate networks, the perpetrators broadcast unauthenticated analog radio-stop tones across standard VHF frequencies, triggering automatic braking systems and paralyzing traffic.
Vulnerability CVE-2025-1727: Identified within North American freight networks, this critical vulnerability permitted unauthorized external transmitters to inject fabricated emergency braking commands directly into onboard locomotive control units, bypassing wayside signal logic.

These incidents highlight a fundamental principle: in modern rail operations, the most vulnerable failure point is rarely the heavy steel track or the physical relay interlocking, but the unencrypted radio and telemetry link spanning wayside transceivers and rolling stock.

Manual Dispatching Realities and Human Error Vulnerabilities

An evaluation of Turkey’s railway network reveals two divergent operating realities. Modern high-speed corridors and primary freight arterials operate under European Train Control System signaling with digital automated protection. Conversely, substantial sections of conventional lines continue to run under centralized telephone dispatching (TMİ).

The technical mechanics of this legacy operation are straightforward:

Trackside electronic signal aspects and automatic train stopping mechanisms are entirely absent.
Train movements across block sections are authorized manually via telephone and voice radio communication between central train dispatchers and station masters.
Because no digital telemetry layer exists, the external cyber attack surface is negligible.

However, relying entirely on voice coordination means that safety hinges on the vigilance of individual operators. A single moment of distraction, a misunderstood track switch identifier, or voice radio static can lead to fatal consequences. Transportation history consistently proves that human cognitive error poses a vastly more frequent danger than remote cyber manipulation.

Modernizing Turkey’s Six-Thousand-Kilometer Signaling Backlog

Official infrastructure surveys and TCDD data (2023–2024) indicate that approximately 6,000 kilometers of the national rail network currently lack modern electronic signaling and automatic train protection. This structural deficit severely limits operating capacity, speeds, and safety margins:

Unsignaled corridors require wide train separation intervals, leading to severe track capacity underutilization.
Operating speeds are restricted to mitigate collision hazards, driving up national logistics costs.
Expanding traffic volumes on manually dispatched lines compounds human cognitive burdens exponentially.

Consequently, comprehensive signaling and electrification programs under national transport agendas do not represent discretionary upgrades; they are foundational investments required to guarantee public safety and critical infrastructure resilience.

A Roadmap for Encrypted Communications and Domestic Engineering

Modernizing critical railway infrastructure requires adopting advanced digital architectures without inheriting unauthenticated communication vulnerabilities:

End-to-End Cryptographic Authentication: Wayside-to-train telemetry and voice radio links must implement robust mutual authentication and encryption, neutralizing the risk of unauthorized command spoofing demonstrated in recent global incidents.
Unified Safety and Security Architecture: Functional safety standards and industrial operational technology cybersecurity protocols must be integrated into a unified systems architecture from inception.
Fostering Domestic Engineering Ecosystems: Domestic defense and industrial engineering organizations must take an active role in rolling out trackside interlocking, onboard control units, and radio communication gateways. Systems developed with transparent national engineering oversight ensure technological self-reliance and straightforward long-term maintainability.

Critical infrastructure safety cannot be left to chance, good fortune, or the fleeting illusion of security through obsolescence. The future of sustainable railways lies in the disciplined combination of fail-safe modern signaling and cryptographically secured communication architectures.

📚 References

Ministry of Transport and Infrastructure (2024). Railway Sector Report and Infrastructure Statistics. Ankara.
TCDD Teknik (2023). Railway Signaling Modernization and Safety Framework. Ankara.
CISA (2025). ICSA-25-191-01: Rail Dispatch and Emergency Stop Signaling Vulnerabilities (CVE-2025-1727). Cybersecurity and Infrastructure Security Agency.
Burgess, M. (2023). How Hackers Used Cheap Radios to Stop Polish Trains. Wired.
ENISA (2024). Railway Cybersecurity: Good Practices and Threat Landscape. European Union Agency for Cybersecurity.
IEC (2018). IEC 62443: Security for Industrial Automation and Control Systems. International Electrotechnical Commission.

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