CBI, or Computer Based Interlocking, is an arrangement of signal devices that prevent conflicting movements through computer-based technologies. Interlocking systems, or IXL, prevent trains from conflicting movements along the track and make it impossible to display a signal to proceed unless the route is proven safe. Trains are guided by signals and appliances like relays and mechanics through control cables. A CBI system uses computers, which provides more advanced reliability and security than earlier mechanical or electrical systems.
Previously interlockings were fully mechanical and not compertized. Computer-Based Interlocking can be compromised via software exploitation, leading to safety and security disruptions.
Leading safety standard make the assupmtion that interlocking systems are always air-gapped and therefore shouldn't be encrypted, while air gaps are a known as an unreliable security measure.
Computer Based Interlocking is a fail safe system, and therefore most abnormal commands can lead to an immediate halt. Threat actors can leverage these halts to cause harm.
Complete information regarding interlocking features, maintenance servers, light signals, point machines, and all CBI functions.
Cutting-edge threat discovery and DPI for vendor-specific interlocking protocols and detection of abnormal commands, attack attempts, and cyber-inflicted disruptions.
Supports compliance with leading cybersecurity standards, such as TS 50701, IEC 62443 and NIST 800-82 using automatic validation of security controls.
February 14, 2024
In this episode Roark Pollock and Susan Howard delve deep into safeguarding light rail's most critical systems, often called the "crown jewels."
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