Digital System Integrity & Cybersecurity
As modern vehicles rely increasingly on software, connectivity and complex electronic architectures, cybersecurity and digital integrity have become inseparable components of overall vehicle safety. AutoSafe™ evaluates the resilience of software, networks and sensors against manipulation, intrusion and spoofing to ensure trust in digital vehicle functions.
The domain focuses on secure over-the-air updates, in-vehicle network protection, access and key management, and the robustness of autonomous and assisted driving stacks against cyber-originated failures. It aligns closely with the IAF Digital Systems Integrity Standard to provide a structured, evidence-based assessment.
Digital System Integrity & Cybersecurity contributes 10% of the global AutoSafe™ rating, expanding beyond traditional crash-based safety to ensure that digital features enhancing convenience and automation do not introduce unacceptable security or integrity risks.
Digital System Integrity & Cybersecurity ensures that connected and software-driven vehicle functions remain secure, reliable and tamper-resistant throughout the vehicle’s lifecycle.
Secure OTA Updates
Secure over-the-air (OTA) updates are essential to maintain and improve vehicle functionality over time without introducing new vulnerabilities. AutoSafe™ evaluates whether software and firmware updates are delivered, verified and installed using robust cryptographic and fail-safe mechanisms.
The focus is on ensuring that only authentic, authorised software can run on safety-critical systems, and that interrupted or compromised update attempts cannot leave the vehicle in an unsafe state—making this a core cybersecurity requirement.
- Signed firmware and software package validation
- Rollback prevention and anti-downgrade controls
- Update integrity and authenticity verification
- Fail-safe logic for power loss or interrupted updates
In-Vehicle Network Security
In-vehicle network security assesses the robustness of internal communication buses such as CAN, LIN, FlexRay and Automotive Ethernet. These networks are high-risk attack surfaces because compromise can directly affect safety-critical actuators and ECUs.
AutoSafe™ looks for message authentication, segmentation and intrusion detection capabilities that limit the spread and impact of malicious traffic, including attacks launched via physical ports or external connectivity gateways.
- Message authentication, segmentation and isolation
- Intrusion resistance and anomaly detection on vehicle buses
- ECU access control, hardening and secure diagnostics
- Protection against attacks via OBD or other physical ports
Keyless & Digital Access Security
Keyless and digital access security evaluates protection against theft techniques that exploit radio signals, mobile-based keys and backend services. The goal is to reduce the risk of unauthorised entry and start without creating user-hostile experiences.
AutoSafe™ examines the strength of encryption, anti-replay measures and tamper responses, treating this as a consumer-critical area where poor design can quickly erode trust in connected access functions.
- Relay attack mitigation and secure signal handling
- Rolling code integrity and anti-replay mechanisms
- Phone-as-key and digital key security validation
- Access lockout policies and tamper detection
Autonomous Driving System Security
Autonomous driving system security ensures that Level 1–3 assisted and automated functions remain safe even when exposed to digital manipulation attempts. This includes resistance to sensor spoofing, navigation interference and hostile control inputs.
AutoSafe™ evaluates both prevention and fail-safe strategies—such as graceful degradation and secure driver takeover protocols—making this a key area for the future of mobility safety.
- Resistance to sensor spoofing (radar, lidar, camera)
- GPS manipulation and position spoofing tests
- Fail-safe driver takeover and fallback protocols
- Redundancy in perception, decision and control paths
Software Architecture Integrity
Software architecture integrity examines how safety-critical software is structured, validated and protected against corruption at runtime. It focuses on ensuring that faults or exploits in non-critical domains cannot propagate into braking, steering or powertrain control.
Isolation, secure boot and runtime monitoring are key elements, forming the backbone of a defensible in-vehicle computing platform that can support complex, connected features without sacrificing safety.
- Memory safety, stack protection and code-hardening practices
- Secure boot and module verification for critical ECUs
- Runtime anomaly detection and fault containment
- Strict isolation between critical and non-critical domains
Scoring Summary
Digital System Integrity & Cybersecurity is weighted at 10% of the global AutoSafe™ score. Core contributors include cyber intrusion resilience, secure OTA implementation, network segmentation and spoofing resistance for automated functions, with penalties applied for weak isolation or insecure access mechanisms.
- Cyber intrusion performance and network resilience
- Security and authenticity of OTA systems
- Spoofing resistance for autonomous and assisted driving
- Penalties for non-isolated ECUs and weak keyless security
Characteristics of High Performance
Vehicles achieving top scores in this domain typically demonstrate:
- End-to-end secured update pipelines with clear auditability
- Segmented, monitored in-vehicle networks with strong ECU hardening
- Robust protection against relay, replay and digital key theft attacks
- Resilient automated driving stacks that degrade safely under attack
- Documented, lifecycle-oriented cybersecurity management practices
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