With cars increasingly becoming networked IT entities, the security threats are also growing. The most visible gateway for hacking attempts into cars is the infotainment domain which connects the vehicle to the outside world.
Part 1 of this series discussed the nature of the problem. This installment looks at different methods of protection.
Open source operating systems such as MeeGo or Ubuntu are well regarded for their adherence to the latest and greatest multimedia standards and availability of third party applications. However, we cannot necessarily depend on the multimedia OS to control all aspects of next-generation consolidated infotainment systems. General-purpose operating systems cannot boot fast enough, cannot guarantee real-time response for protocols such as CAN, and are not reliable and secure enough for safety-critical functions such as rear-view camera and integrated clusters.
Therefore we need a system architecture in which multimedia operating systems and their applications can peacefully coexist with real-time, high assurance applications, hosted on a real-time, safety-rated operating system.
One potential solution is to have multiple processors dedicated to the differing tasks. However, this results in the same issues as today's multiple ECUs, lowering the speed of communication between applications and increasing boundary complexity.
The need to contain these functions on a single processor is very real, enabling optimization of cost, processing cycles, data availability, and complexity. We need sandboxes for these mixed-criticality workloads. One can think of each sandbox as an isolated persona (silo).
The following four approaches to multiple personas have been commercialized in one form or another:
- Type-2 hypervisor
- Type-1 hypervisor
For the complete article, which details the four above approaches, secure network transactions, and reference platforms, click here
, courtesy of Automotive Designline Europe.
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