Secure Connectivity for Automotive Solutions
Chris Berg, Solutions Architect at SYSGO, talks about the benefits of secure data streams in embedded Automotive applications.
In particular the communication with the outside world requires deterministic and accurate response times that can only be achieved by means of an underlying real-time operating system.
The electronic systems inside a modern car are able to take control over critical systems, such as the steering and braking gear. This significantly improves the Safety during the car's operation, but at the same exposes the risk of unauthorised access. As a consequence, the vehicle's Safety must be accompanied by Security measures. Therefore, the connectivity platform contains a gateway utilising a robust routing system implementing a firewall and an intrusion detection system.
The list of desired features is growing year by year. This usually requires the combination of existing software components with completely new and partially incompatible application programming interfaces. Maintaining a stable software basis while being able to follow the desires of the end user is a challenge. This is where virtualization comes into play. The connectivity platform is extendable easily by adding an arbitrary number of guest operating systems without compromising Safety or Security.
The PikeOS operation system has been chosen as the backbone of the Secure Automotive Platform, as it naturally fulfils the substantial requirements of determinism and real-time, Security, Safety and virtualization. As a Type 1 hypervisor, it directly runs on the embedded hardware and makes the overall system as performant as possible. Another performance boost comes through the multi-core support, which has proven its maturity in recent Railway projects.
In the example of a gateway, the supported default configuration communicates to the outside world by means of a 4G/5G network. A firewall protects the vehicle internal WI-FI hotspot, which is available to the passenger’s convenience.
The internal communication lines, such as CAN and Ethernet are available to the hotspot by means of dedicated and surveillance channels only. The gateway supports Virtual Local Area Networks (VLAN).
Networking in Security
Connectivity of embedded computer devices by means of different network technologies has increases during the last years. We tell you why RTOS virtualization regarding Safety & Security certification is recommended.
The platform utilises a secure boot mechanism. Communication is assured by means of a Transport Layer Security (TLS) library. Cryptography and Storage is supported by executable binaries and configuration files that are digitally signed and stored on a secure Certified File System (CFS). The gateway’s network Intrusion Detection System (IDS) is located within a separate partition, that monitors the network traffic. In addition to security aspects, this approach demonstrates the ability of PikeOS to resolve licensing issues by means of software isolation
Over-The-Air (OTA) Updates
The platform allows the update of software and firmware components of the entire system by means of secure communication via TLS (Transport Layer Security, FIPS certified). Update files are signed digitally.
- Certifiable File System (ASIL-B)
- Crypto services
- Management API
- Secure Automotive Communication API
- VLAN, IPv6 and IP-Multicast
- Router supporting Firewall
- Secure OTA
- ARM Trustzone support
- Network Intrusion Detection System
- Optional CAN Intrusion Detection System
- Security Monitoring (CVE’s)
- Long-term support
Optional Guest Operating Systems
The platform supports the integration of the following guest operating systems:
- PikeOS native
- Linux (generic by means of hardware virtualization)
- AGL (Automotive Grade Linux)
- ELinOS, SYSGO’s own robust Embedded Linux distribution
Robust Automotive Development Platform
API compatibility to ELinOS, PikeOS native, POSIX or CFS
Enabled freedom from interference mechanisms with regards to safe/unsafe or secure/unsecure critical functions
- Included pre-certified components according to ISO 26262 or Common Criteria EAL 3+ or FIPS
- Pre-integrated Security components such as secure boot, IDS, TLS or CFS
- Pre-configured network settings and infrastructure
- Re-use of existing legacy code from previous projects
- Fast system reaction time via deterministic real-time behaviour
- Multi-core applications
- Task scheduling
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