SAE J3101:2020 pdf free
SAE J3101:2020 pdf free.Hardware Protected Security for Ground Vehicles
One of the primary purposes of the HW hardware protected security environment is to reduce the size, complexity, and attack surface of the trust base of the system as a whole, forming a minimal trust anchor which is implicitly trusted. The trust anchor then forms the basis by which all other functionality may be verified. Additionally, the hardware protected security environment includes a means to shield secrets from the normal environment and resist exposure of secrets.
Normal environment applications can make use of the security environment to secure data on behalf of such application;additionally, normal environment applications may make use of the hardware of a hardware protected security environment directly, however, only using it in a non-trusted manner.
The hardware protected security environment is potentially a closed system where inputs are controlled, and requirements can be implemented with respect to RAM, key storage, etc. With this closed system, a general building block may be achieved. Those blocks could be used at a system level if appropriate and applicable. Leveraging this building block model,certain hardware protected security environment requirements may apply to any ECU within vehicle networks, while others may only apply to specialized ECUs such as gateways and outside vehicle communications ECUs.
For example, under the use case of a smart sensor where only a very small microcontroller is used, proposals are pushing security into the smart sensors or also relying on security of the receive side of the signal (upstream to the ECU). Best practice would be to put a hardware protected security environment even in constrained sensors that are downstream and not internal to another ECU (with a hardware protected security environment). Such would provide defenses to avoid internally originated attacks on an in-vehicle network.SAE J3101 pdf free download.
